MTB


Line plots across dimensions of each concept
Tables

Table of contents



us-gaap:CommonStockValue

us-gaap:CommonStockSharesIssued

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareDiluted
us-gaap:ProductOrService
us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:ConsolidationItems
us-gaap:Revenues
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:InterestExpense

us-gaap:InterestExpenseLongTermDebt

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

us-gaap:IncomeTaxExpenseBenefit

us-gaap:IncomeTaxesPaidNet

us-gaap:ComprehensiveIncomeNetOfTax
us-gaap:StatementEquityComponents

us-gaap:NetIncomeLoss
us-gaap:StatementBusinessSegments

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted

us-gaap:Assets
us-gaap:ConsolidatedEntities

us-gaap:Liabilities

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:StockholdersEquity
us-gaap:InvestmentType
us-gaap:StatementEquityComponents
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
us-gaap:CashAndCashEquivalentsAtCarryingValue
us-gaap:FairValueByMeasurementBasis

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:Goodwill

us-gaap:FiniteLivedIntangibleAssetsNet

us-gaap:LongTermDebt
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
us-gaap:FairValueByMeasurementBasis
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:StatementEquityComponents

us-gaap:StockholdersEquity
us-gaap:InvestmentType
us-gaap:StatementEquityComponents

us-gaap:CommonStockValue

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:TreasuryStockValue

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetIncomeLoss
us-gaap:StatementBusinessSegments

us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:RepaymentsOfLongTermDebt

us-gaap:PaymentsForRepurchaseOfCommonStock

us-gaap:RepaymentsOfLongTermDebt

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument
mtb:AssumptionForFairValueOfInterestsContinuedToBeHeldByTransferorServicingAssetsOrLiabilitiesOptionAdjustedBasisSpreadOnVariableRate

mtb:CommonSharesOutstandingIncludingCommonStockIssuableAndUnvestedStockBasedCompensationAwards

mtb:DepreciationAndAmortization1
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation, us-gaap:TradingActivityByType
mtb:GainLossOnHedgedItemInFairValueHedge

mtb:ImpairedFinancingReceivableNonaccrualInterestIncome
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

mtb:IncomeAttributableToUnvestedStockBasedCompensationAwardsBasic

mtb:IncomeAttributableToUnvestedStockBasedCompensationAwardsDiluted

mtb:IncreaseDecreaseInEstimatedFairValueOfInterestRateContractsInAssetPosition

mtb:IncreaseDecreaseInEstimatedFairValueOfInterestRateContractsInLiabilityPosition
us-gaap:FairValueByFairValueHierarchyLevel
mtb:IncreaseDecreaseInFairValueOfNonrecurringFairValueMeasuredLoansForChargeOffsAndImpairmentReserves

mtb:IncreaseDecreaseInShortTermBorrowings

mtb:InterestExpensesSavingsAndInterestCheckingDeposits

mtb:InvestmentRepurchaseAgreementAmountToBeReceived1
us-gaap:Range
mtb:MeasurementInputAdjustments

mtb:NetChangeInAccruedInterestReceivablePayable

mtb:NetIncomeLossAvailableToCommonStockholdersBasicBeforeUnvestedStockBasedCompensationAwardsAdjustment

mtb:NetIncomeLossAvailableToCommonStockholdersDilutedBeforeUnvestedStockBasedCompensationAwardsAdjustment

mtb:NetIncreaseDecreaseInLoanServicingAdvances

mtb:OtherComprehensiveIncomeAmortizationOfDefinedBenefitPlanActuarialLossRecognizedInNetPeriodicBenefitCostNetOfTax

mtb:OtherComprehensiveIncomeAmortizationOfDefinedBenefitPlanActuarialLossRecognizedInNetPeriodicBenefitCostTaxEffect

mtb:OtherComprehensiveIncomeLossNetYieldAdjustmentFromCashFlowHedgesBeforeTax
us-gaap:StatementEquityComponents

mtb:OtherComprehensiveIncomeLossNetYieldAdjustmentFromCashFlowHedgesNetOfTax

mtb:OtherComprehensiveIncomeLossNetYieldAdjustmentFromCashFlowHedgesTax

mtb:OtherComprehensiveIncomeReclassificationToIncomeOfUnrealizedHoldingLossesBeforeTax
us-gaap:InvestmentType

mtb:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnHeldToMaturitySecuritiesArisingDuringPeriodNetOfTax

mtb:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnHeldToMaturitySecuritiesArisingDuringPeriodTax

mtb:PaymentsToAcquireEquityAndOtherSecuritiesInvestments
us-gaap:Range, us-gaap:FairValueByAssetClass, us-gaap:FairValueByMeasurementFrequency, us-gaap:ValuationTechnique
mtb:PercentageOfFairValueInputsCommitmentExpirations

mtb:ProceedsFromSaleOfEquityAndOtherSecuritiesInvestments
us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship
mtb:ReductionInEstimatedFairValueLossesOnHedgingInstruments
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
mtb:RevenuesFromSubservicing

mtb:ShareBasedCompensationExpenseNet
us-gaap:StatementEquityComponents

mtb:TaxableEquivalentAdjustment

mtb:UnvestedStockBasedCompensationAwards

us-gaap:AffordableHousingTaxCreditsAndOtherTaxBenefitsAmount

us-gaap:AllowanceForLoanAndLeaseLossesWriteoffsNet
us-gaap:FinancingReceivablePortfolioSegment

us-gaap:AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization

us-gaap:AmortizationOfIntangibleAssets

us-gaap:AmortizationOfMortgageServicingRightsMSRs

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:AssetImpairmentCharges
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument
us-gaap:AssumptionForFairValueOfInterestsContinuedToBeHeldByTransferorServicingAssetsOrLiabilitiesPrepaymentSpeed

us-gaap:BrokerageCommissionsRevenue

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect
us-gaap:StatementEquityComponents
us-gaap:CommonStockDividendsPerShareCashPaid

us-gaap:DebtAndEquitySecuritiesGainLoss

us-gaap:DeferredIncomeTaxExpenseBenefit
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAmortizationOfGainsLosses
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAmortizationOfPriorServiceCostCredit
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanInterestCost
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanServiceCost
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation, us-gaap:TradingActivityByType
us-gaap:DerivativeGainLossOnDerivativeNet
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet

us-gaap:DividendsCommonStockCash
us-gaap:StatementEquityComponents

us-gaap:DividendsPreferredStockCash
us-gaap:StatementEquityComponents
us-gaap:FairValueByAssetClass, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1
us-gaap:FairValueByAssetClass, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPeriodIncreaseDecrease
us-gaap:FairValueByAssetClass, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3

us-gaap:FederalDepositInsuranceCorporationPremiumExpense

us-gaap:FinancingReceivableAllowanceForCreditLossesRecovery
us-gaap:FinancingReceivablePortfolioSegment

us-gaap:FinancingReceivableAllowanceForCreditLossesWriteOffs
us-gaap:FinancingReceivablePortfolioSegment

us-gaap:FinancingReceivableModificationsNumberOfContracts2

us-gaap:FinancingReceivableModificationsPostModificationRecordedInvestment2

us-gaap:FinancingReceivableModificationsPreModificationRecordedInvestment2

us-gaap:GainLossOnDerivativeInstrumentsHeldForTradingPurposesNet
us-gaap:DerivativeInstrumentRisk

us-gaap:GainsLossesOnSalesOfAssets
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:IncomeStatementLocation
us-gaap:IncomeLossFromEquityMethodInvestments

us-gaap:IncreaseDecreaseInDeposits

us-gaap:IncreaseDecreaseInFairValueOfInterestRateFairValueHedgingInstruments1
us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:FinancialInstrument
us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:TradingActivityByType

us-gaap:IncreaseDecreaseInFinancialInstrumentsUsedInOperatingActivities

us-gaap:IncreaseDecreaseInLoansHeldForSale

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

us-gaap:InformationTechnologyAndDataProcessing

us-gaap:InterestAndDividendIncomeOperating

us-gaap:InterestAndFeeIncomeLoansAndLeases

us-gaap:InterestExpenseForeignDeposits

us-gaap:InterestExpenseShortTermBorrowings

us-gaap:InterestExpenseTimeDeposits

us-gaap:InterestIncomeDomesticDeposits

us-gaap:InterestIncomeExpenseAfterProvisionForLoanLoss

us-gaap:InterestIncomeExpenseNet

us-gaap:InterestIncomeSecuritiesTaxExempt

us-gaap:InterestIncomeSecuritiesTaxable

us-gaap:InterestPaidNet

us-gaap:LaborAndRelatedExpense

us-gaap:LitigationSettlementAmountAwardedToOtherParty
us-gaap:EmployeeStockOwnershipPlanESOPDisclosuresByPlan

us-gaap:MarketingAndAdvertisingExpense

us-gaap:NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfAdoptionQuantification
us-gaap:AdjustmentsForNewAccountingPronouncements
us-gaap:AdjustmentsForNewAccountingPronouncements, us-gaap:StatementEquityComponents
us-gaap:FinancingReceivablePortfolioSegment

us-gaap:NoninterestExpense

us-gaap:NoninterestIncome

us-gaap:NoninterestIncomeOtherOperatingIncome

us-gaap:OccupancyNet

us-gaap:OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossBeforeReclassificationAndTax
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax

us-gaap:OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax

us-gaap:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax

us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax
us-gaap:InvestmentType
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax

us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsTax

us-gaap:OtherComprehensiveIncomeLossBeforeTax
us-gaap:InvestmentType
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax

us-gaap:OtherComprehensiveIncomeLossNetOfTax
us-gaap:InvestmentType
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesTax

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossTax

us-gaap:OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax

us-gaap:OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax
us-gaap:InvestmentType

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax

us-gaap:OtherInterestAndDividendIncome

us-gaap:OtherNoninterestExpense

us-gaap:PaymentsForProceedsFromLoansAndLeases

us-gaap:PaymentsForProceedsFromOtherInvestingActivities

us-gaap:PaymentsForProceedsFromProductiveAssets

us-gaap:PaymentsOfDividendsCommonStock

us-gaap:PaymentsOfDividendsPreferredStockAndPreferenceStock

us-gaap:PaymentsToAcquireAvailableForSaleSecurities

us-gaap:PaymentsToAcquireHeldToMaturitySecurities

us-gaap:PensionAndOtherPostretirementBenefitExpense

us-gaap:PreferredStockDividendsIncomeStatementImpact
us-gaap:StatementClassOfStock
us-gaap:PreferredStockDividendsPerShareCashPaid

us-gaap:ProceedsFromInterestReceived

us-gaap:ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities

us-gaap:ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities

us-gaap:ProceedsFromPaymentsForInInterestBearingDepositsInBanks

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities

us-gaap:ProvisionForLoanAndLeaseLosses
us-gaap:FinancingReceivablePortfolioSegment

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument
us-gaap:ServicingAssetAtAmortizedValueValuationAllowance
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument
us-gaap:ServicingAssetAtFairValuePeriodIncreaseDecrease

us-gaap:SuppliesAndPostageExpense

us-gaap:TradingGainsLosses

us-gaap:TransferToOtherRealEstate

us-gaap:TreasuryStockValueAcquiredCostMethod
us-gaap:StatementEquityComponents

mtb:AccumulatedOtherComprehensiveIncomeLossIncomeTax

mtb:AverageAsset
us-gaap:StatementBusinessSegments

mtb:CommitmentsRegardingCommercialLettersOfCredit

mtb:CommitmentsRegardingFinancialGuaranteesAndIndemnificationContracts

mtb:CommitmentsToExtendCreditForCommercialAndOther

mtb:CommitmentsToExtendCreditForCommercialRealEstateLoansToBeSold

mtb:CommitmentsToExtendCreditForHomeEquityLinesOfCredit

mtb:CommitmentsToExtendCreditForOtherCommercialRealEstate

mtb:CommitmentsToExtendCreditForOtherResidentialRealEstate

mtb:CommitmentsToExtendCreditForResidentialRealEstateLoansToBeSold

mtb:CommitmentsToExtendCreditToCommercialCustomers
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
mtb:CommitmentsToOriginateRealEstateLoansForSale
us-gaap:FairValueByMeasurementBasis
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
mtb:CommitmentsToSellRealEstateLoansNet
us-gaap:FairValueByMeasurementBasis

mtb:CommitmentsToSellRealEstateLoansNotionalAmount

mtb:CommonStockIssuable

mtb:CommonStockIssuableShare

mtb:DerivativeHedgedLoans

mtb:EquityAndOtherSecuritiesAtCost

mtb:EquityAndOtherSecuritiesEstimatedFairValue

mtb:EquitySecuritiesGrossUnrealizedGains
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
mtb:InterestRateSwapAgreementsUsedForInterestRateRiskManagement
us-gaap:FairValueByMeasurementBasis

mtb:InvestmentInDebtSecuritiesAmortizedCost

mtb:InvestmentInDebtSecuritiesEstimatedFairValue

mtb:InvestmentInDebtSecuritiesGrossUnrealizedGains

mtb:InvestmentInDebtSecuritiesGrossUnrealizedLosses

mtb:InvestmentSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsAggregateLosses

mtb:InvestmentSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue

mtb:InvestmentSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerAggregateLosses

mtb:InvestmentSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue

mtb:InvestmentsInVariableInterestEntityCarryingAmount
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
mtb:LoansAndLeasesReceivableConsumerInstallmentRevolvingAndHomeEquity
us-gaap:FairValueByMeasurementBasis

mtb:LoansAndLeasesReceivableThirtyToEightyNineDaysPastDue
us-gaap:CreditFacility, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:ExtinguishmentOfDebt, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

mtb:MaximumCreditRiskForRecourseAssociatedWithLoansSoldUnderFederalNationalMortgageAssociationDelegatedUnderwritingAndServicingProgram
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
mtb:MortgageLoansOfPrivatelyHeldCompany

mtb:OtherAssetsForItsInvestmentInCommonSecuritiesRecognizedByCompanyOfVariousTrusts
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
mtb:OtherCreditRelatedCommitments
us-gaap:FairValueByMeasurementBasis

mtb:ReadilyMarketableSecuritiesAtEstimatedFairValue

mtb:ReadilyMarketableSecuritiesAtFairValueAmortizedCost

mtb:ReadilyMarketableSecuritiesAtFairValueGrossUnrealizedGains

mtb:ResidentialMortgageLoansSecuredByResidentialRealEstateInProcessOfForeclosure

mtb:SavingsAndInterestCheckingDeposits
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
us-gaap:FairValueByMeasurementBasis
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
mtb:SubServicedResidentialMortgageLoansOfPrivatelyHeldCompany

mtb:TradingAccount

mtb:UnfundedCommitmentsIncludesCarrryingAmountOfItsInvestments
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
us-gaap:AccruedInvestmentIncomeReceivable
us-gaap:FairValueByMeasurementBasis

us-gaap:AccumulatedOtherComprehensiveIncomeLossBeforeTax1
us-gaap:InvestmentType
us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:AssetsFairValueDisclosure
us-gaap:FairValueByMeasurementFrequency

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
us-gaap:FinancialInstrument

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
us-gaap:FinancialInstrument

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis
us-gaap:FinancialInstrument

us-gaap:AvailableForSaleSecuritiesDebtSecurities
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument
us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument
us-gaap:FinancialInstrument

us-gaap:CashAndDueFromBanks
us-gaap:FinancialInstrument
us-gaap:CollateralAlreadyPostedAggregateFairValue

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger
us-gaap:FinancialInstrument

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss
us-gaap:FinancialInstrument

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months
us-gaap:FinancialInstrument

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss
us-gaap:FinancialInstrument
us-gaap:BalanceSheetLocation
us-gaap:DeferredRevenue

us-gaap:Deposits

us-gaap:DepositsForeign
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
us-gaap:FairValueByMeasurementBasis

us-gaap:DerivativeAssetFairValueOfCollateral
us-gaap:FairValueByMeasurementBasis, us-gaap:FinancialInstrument, us-gaap:HedgingDesignation
us-gaap:DerivativeAssetsLiabilitiesAtFairValueNet
us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:FinancialInstrument
us-gaap:DerivativeAverageFixedInterestRate
us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:TradingActivityByType
us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:FinancialInstrument
us-gaap:DerivativeAverageVariableInterestRate
us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:TradingActivityByType

us-gaap:DerivativeFairValueOfDerivativeAsset
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation
us-gaap:HedgingDesignation

us-gaap:DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral

us-gaap:DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral

us-gaap:DerivativeFairValueOfDerivativeLiability
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation
us-gaap:HedgingDesignation

us-gaap:DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral
us-gaap:FinancialInstrument
us-gaap:DerivativeLiabilityFairValueOfCollateral

us-gaap:DerivativeNotionalAmount
us-gaap:DerivativeInstrumentRisk
us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:FinancialInstrument
us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:TradingActivityByType
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:EquitySecuritiesFvNi
us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByAssetClass, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue
us-gaap:FairValueByAssetClass, us-gaap:FairValueByMeasurementFrequency, us-gaap:ValuationTechnique
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
us-gaap:FederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchase
us-gaap:FairValueByMeasurementBasis

us-gaap:FederalHomeLoanBankStockAndFederalReserveBankStock

us-gaap:FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing

us-gaap:FinancingReceivableRecordedInvestmentCurrent
us-gaap:CreditFacility, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:ExtinguishmentOfDebt, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FairValueByMeasurementFrequency
us-gaap:ForeclosedAssets

us-gaap:HeldToMaturitySecurities
us-gaap:FinancialInstrument

us-gaap:HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain
us-gaap:FinancialInstrument

us-gaap:HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss
us-gaap:FinancialInstrument

us-gaap:HeldToMaturitySecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss
us-gaap:FinancialInstrument

us-gaap:HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss
us-gaap:FinancialInstrument

us-gaap:HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue
us-gaap:FinancialInstrument

us-gaap:HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue
us-gaap:FinancialInstrument

us-gaap:HeldToMaturitySecuritiesFairValue
us-gaap:FinancialInstrument

us-gaap:ImpairedFinancingReceivableRelatedAllowance
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:ImpairedFinancingReceivableUnpaidPrincipalBalance

us-gaap:ImpairedFinancingReceivableWithNoRelatedAllowanceUnpaidPrincipalBalance
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:ImpairedFinancingReceivableWithRelatedAllowanceUnpaidPrincipalBalance
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:InterestBearingDepositsInBanks
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
us-gaap:FairValueByMeasurementBasis
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
us-gaap:InterestPayableCurrentAndNoncurrent
us-gaap:FairValueByMeasurementBasis

us-gaap:InterestReceivableAndOtherAssets

us-gaap:Investments
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
us-gaap:FairValueByMeasurementBasis

us-gaap:LettersOfCreditOutstandingAmount
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:LiabilitiesFairValueDisclosure
us-gaap:FairValueByMeasurementFrequency

us-gaap:LoansAndLeasesReceivableAllowance

us-gaap:LoansAndLeasesReceivableDeferredIncome

us-gaap:LoansAndLeasesReceivableGrossCarryingAmount

us-gaap:LoansAndLeasesReceivableImpairedNonperformingNonaccrualOfInterest
us-gaap:CreditFacility, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:ExtinguishmentOfDebt, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:LoansAndLeasesReceivableNetOfDeferredIncome

us-gaap:LoansAndLeasesReceivableNetReportedAmount
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
us-gaap:FairValueByMeasurementBasis
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:LoansHeldForSaleFairValueDisclosure
us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:LoansReceivableFairValueDisclosure
us-gaap:FairValueByMeasurementFrequency
us-gaap:FinancialInstrument, us-gaap:FinancingReceivablePortfolioSegment
us-gaap:LoansReceivableHeldForSaleNetNotPartOfDisposalGroup
us-gaap:Range
us-gaap:LossContingencyEstimateOfPossibleLoss
us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName
us-gaap:MortgageBackedSecuritiesHeldToMaturityFairValueDisclosure

us-gaap:NoninterestBearingDepositLiabilitiesDomestic
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
us-gaap:FairValueByMeasurementBasis
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:NotesReceivableGross
us-gaap:FairValueByMeasurementBasis, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:OtherAssetsFairValueDisclosure
us-gaap:FairValueByMeasurementFrequency

us-gaap:OtherInvestmentsAndSecuritiesAtCost

us-gaap:OtherLiabilities
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:OtherLiabilitiesFairValueDisclosure
us-gaap:FairValueByMeasurementFrequency

us-gaap:OtherRealEstateAndForeclosedAssets
us-gaap:StatementClassOfStock
us-gaap:PreferredStockSharesIssued
us-gaap:StatementClassOfStock
us-gaap:PreferredStockSharesOutstanding

us-gaap:PreferredStockValue

us-gaap:RevenueRemainingPerformanceObligation

us-gaap:SecuritiesHeldAsCollateralAtFairValue

us-gaap:SecuritiesSoldUnderAgreementsToRepurchaseFairValueOfCollateral
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument
us-gaap:ServicingAssetAtAmortizedValue

us-gaap:ShortTermBorrowings

us-gaap:TimeDeposits
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
us-gaap:FairValueByMeasurementBasis
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
us-gaap:TradingLiabilitiesFairValueDisclosure
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByMeasurementBasis
us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis
us-gaap:TradingSecurities
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByMeasurementBasis
us-gaap:FairValueByMeasurementFrequency

us-gaap:TreasuryStockCommonShares

Tables

  2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-30
us-gaap:CommonStockValue █████████████▂▂▂▂▂▂▂▁▁▁7979797979797979797979797966666666656565646463
us-gaap:CommonStockSharesIssued █████████████▂▂▂▂▂▂▂▁▁▁159159159159159159159159159159159159159133133132132131131130129128127
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding ▂▂▃▃▄▅▆▆▇▇▇██▂▂▂▂▂▂▂▂▁▁129132135137142144148151153154156158159133133132132131131130129128126
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic ▂▂▃▄▅▅▆▇▇▇▇██▂▂▂▂▂▂▂▂▁▁129132135137142144148151152154155157158132132132131130130129128127125
us-gaap:EarningsPerShareBasic ▂█▇▇█▇▃▃▄▃▃▂▁▂▂▁▂▂▁▃▄▂▃1.933.473.343.353.543.262.242.222.362.132.11.981.741.941.991.661.921.991.632.132.562.02.18
us-gaap:EarningsPerShareDiluted ▂█▇▇█▇▃▃▄▃▃▂▁▂▂▁▂▂▁▃▄▂▃1.933.473.343.353.533.262.232.212.352.122.11.981.731.931.981.651.911.981.612.112.551.982.17
  2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-30
 us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:ProductOrService us-gaap:DepositAccount▄█▄▁▅▄▃▆▄106111107103108106105109106NANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:ProductOrService us-gaap:FiduciaryAndTrust█▇▇▃▄▅▃▁▂148143144132133137131124126NANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:ProductOrService us-gaap:MortgageBanking▇█▄▂▁▂▁▂▁127137107958892879686NANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName mtb:BayviewLendingGroupAndBayviewFinancial▁▁▁▁███3333444NANANANANANANANANANANANANANANANA
 us-gaap:Revenues us-gaap:ConsolidationItems us-gaap:OperatingSegments▇███▇▇▆▆▆▅▅▄▄▂▃▁▂▂▁▂▃▁▁15061557155315501488146614341416139913611349131212921132118010991120112510761150118610881108
 us-gaap:Revenues us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:IntersegmentElimination,mtb:BusinessBanking▁▁█▁▁▁▁▁█▁██▁██████████00100000101101111111111
 us-gaap:Revenues us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:IntersegmentElimination,mtb:CommercialBanking█▁▁▁▁▁▁▁▁▁▁▁███████████10000000000011111111111
 us-gaap:Revenues us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:IntersegmentElimination,mtb:CommercialRealEstateSegment▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄00000000000000000000NA15
 us-gaap:Revenues us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:IntersegmentElimination,mtb:ResidentialMortgageBanking▅▅▄▃▃▄▃▄▄▄▆▅▅▂▂▂▂▂▁▃▅▄█211917141516151818182221191212111211915211828
 us-gaap:Revenues us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:IntersegmentElimination,mtb:RetailBanking▁▃▆▆▆▆▆▆██████████████▆01222222333333333333332
 us-gaap:Revenues us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,mtb:BusinessBanking▇█▇▇▇▇▅▆▅▃▃▃▃▃▃▂▂▁▁▂▂▂▃137143140139138136127130124115116114113112111108107104102107106105114
 us-gaap:Revenues us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,mtb:CommercialBanking█▇▆▄▆▅▄▄▆▅▄▄▂▅▃▁▁▂▁▃▂▁▂291282278267280269266267277273268265253270257246249252248257252249255
 us-gaap:Revenues us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,mtb:CommercialRealEstateSegment▇█▇▆▆▅▅▆▄▄▅▄▃▃▃▁▂▂▁▂223238225219214205202212197195205192177181178163170164158171NA165169
 us-gaap:Revenues us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,mtb:DiscretionaryPortfolio▄▄▅▅▅▅▄▅▆▆█▇▆▂▃▃▃▃▃▄▁▂▂49506063535850657278114988613201517292444-14121
 us-gaap:Revenues us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,mtb:ResidentialMortgageBanking▆▅▃▁▁▁▁▂▂▃▄▄▃▃▅▅▅▅▃▃▅▆█125115968379828290889310810396991121111101109492111119138
 us-gaap:Revenues us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,mtb:RetailBanking▇████▇▆▆▆▅▅▄▄▃▃▃▂▁▁▃▂▂▃402432436430427420393392383361353345339308305300274268261314292291318
 us-gaap:Revenues us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,us-gaap:AllOtherSegments▆▆▇█▆▆▇▅▅▅▃▃▄▁▃▂▃▃▁▂▅275294315346294293311257254242182192225146194154194194132163248NANA
us-gaap:InterestExpense ▅██▇▅▄▃▃▂▂▃▃▃▂▂▂▁▁▁▁▁▁▂143199196176138120106100929111110610077777873656669727382
us-gaap:InterestExpenseLongTermDebt ▁▅███▆▄▃▂▃▆▆▅▇▇▇▆▃▄▃▄▄▄4056666766585347444658585762626458495049505053
us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax ▁▃▆▆▆▁█▆█▆▆▃▆▆█▁▃▆▆█▆▆▆-2-1000-210100-1001-2-1001000
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest ▁▇▇▇█▇▃▆▆▄▅▅▃▃▃▂▃▃▁349635625634696654457580596518550530467434453375425427354NANANANA
us-gaap:IncomeTaxExpenseBenefit ▁▅▄▄▅▅▂██▅▇▇▅▅▅▄▄▃▃▄▆▄▄80154152151170161105224215169200194169154166133136129113149182141152
us-gaap:IncomeTaxesPaidNet ▃▄▄▅▃▅▃▅█▃▃▆▁▅▅▄▅▆▃▅▇▃▄44599314921137371412912933191-86147136881311934104216968
us-gaap:ComprehensiveIncomeNetOfTax █▅▇▇▅▅▁▃▄▃▃▃▄▃▁▂▁▃▂685512648614501458250378402351336385399334221270247349267NANANANA
 us-gaap:ComprehensiveIncomeNetOfTax us-gaap:StatementEquityComponents us-gaap:AccumulatedOtherComprehensiveIncome█▃▅▄▂▂▁▃▃▂▂▃▄▃▂▃▂▃▃41632175132-24-34-10222213-134910154-6528-276538NANANANA
 us-gaap:ComprehensiveIncomeNetOfTax us-gaap:StatementEquityComponents us-gaap:RetainedEarnings▂▇▇▇█▇▄▄▅▄▄▄▃▂▂▁▂▂▁268480473482526493352355381348349336298280286241275284229NANANANA
us-gaap:NetIncomeLoss ▂▇▇▇█▇▄▄▅▄▄▄▃▂▂▁▂▂▁▃▄▂▃268480473482526493352355381348349336298280286241275284229294348274293
 us-gaap:NetIncomeLoss us-gaap:StatementBusinessSegments mtb:BusinessBanking▄█▇▇▇▇▅▄▃▁▁▁▂▂▂▂▄▃▃▂▄▄▆3246424343433731282221222523252430272826303238
 us-gaap:NetIncomeLoss us-gaap:StatementBusinessSegments mtb:CommercialBanking█▆▅▆█▆▅▄▃▄▃▃▃▃▃▂▃▃▂▂▁▃▄14313212313214712612510910511210210510110810896101105999787107112
 us-gaap:NetIncomeLoss us-gaap:StatementBusinessSegments mtb:CommercialRealEstateSegment▆█▇▆▆▆▅▄▃▂▃▂▂▂▂▂▁▁▁▂11713112111711611210897878490848085798078757479NA7675
 us-gaap:NetIncomeLoss us-gaap:StatementBusinessSegments mtb:RetailBanking▆▇████▇▅▅▄▃▄▃▃▃▃▁▁▁▂▂▂▃110131140145141143123961008169716364686832322953515258
us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic ▂▇▇▇█▇▄▄▅▄▄▃▃▂▂▁▂▂▁▃▄▂▂250461452462505472332335360328326312275257263218251260211275328255273
us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted ▂▇▇▇█▇▄▄▅▄▄▃▃▂▂▁▂▂▁▃▄▂▂250461452462505472332335360328326312275257263218251260211275328255273
  2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-30
us-gaap:Assets ██▇▇▆▇▇▇▇▇███▄▃▄▃▂▂▂▁▁▁12457712550012155412002511682711842611862212040112089612322312684112382012462597797970809837797228908358853084427832298281181085
us-gaap:Liabilities ██▇▇▆▇▇▇▇▇█▇█▃▃▄▃▂▂▁▁▁▁10876210972110586310443710139110284810291310408310461310701011050010734910827084875844128584984895786667664373411725127238971139
us-gaap:LiabilitiesAndStockholdersEquity ██▇▇▆▇▇▇▇▇███▄▃▄▃▂▂▂▁▁▁12457712550012155412002511682711842611862212040112089612322312684112382012462597797970809837797228908358853084427832298281181085
us-gaap:StockholdersEquity ▇▇▇▇▇▇▇██████▄▄▄▄▃▃▂▂▂▁158151577915691155871543615577157091631816283162131634016471163551292112667125281233312168118861101610716104229945
 us-gaap:StockholdersEquity us-gaap:StatementEquityComponents us-gaap:AdditionalPaidInCapital█████████████▂▂▂▂▂▁▁▁▁6588658465776568658565796572659866046603668966906683351134773445337733473302319231123061NA
 us-gaap:StockholdersEquity us-gaap:StatementEquityComponents us-gaap:RetainedEarnings██▇▇▆▆▅▅▄▄▄▃▃▃▃▂▂▂▂▁▁▁12837124901216211842111281076310404990996859437902188018596827381077934764274817309707468876645NA
  2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-30
 us-gaap:CashAndCashEquivalentsAtCarryingValue us-gaap:FairValueByFairValueHierarchyLevel,us-gaap:FairValueByMeasurementBasis us-gaap:FairValueInputsLevel1,us-gaap:EstimateOfFairValueFairValueDisclosure▂█▁125617651214NANANANANANANANANANANANANANANANANANANANA
 us-gaap:CashAndCashEquivalentsAtCarryingValue us-gaap:FairValueByFairValueHierarchyLevel,us-gaap:FairValueByMeasurementBasis us-gaap:FairValueInputsLevel2,us-gaap:EstimateOfFairValueFairValueDisclosure▁▇█415356NANANANANANANANANANANANANANANANANANANANA
 us-gaap:CashAndCashEquivalentsAtCarryingValue us-gaap:FairValueByMeasurementBasis us-gaap:CarryingReportedAmountFairValueDisclosure▂▆▂▂▂▃▂▃▂▂▂▂▁▂▂▂▄▇▆█12981818127112671311136912921368134512861332128411781249135013661523191717632059NANANA
 us-gaap:CashAndCashEquivalentsAtCarryingValue us-gaap:FairValueByMeasurementBasis us-gaap:EstimateOfFairValueFairValueDisclosure▂▆▂▂▂▃▂▃▂▂▂▂▁▂▂▂▄▇▆█12981818127112671311136912921368134512861332128411781249135013661523191717632059NANANA
  2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-30
us-gaap:PropertyPlantAndEquipmentNet █▇▇▇▂▂▂▂▂▂▂▂▂▁▁▁▁▂▂▁▁▁▁1154107410661044634637628656673672660658662581590602612625627614595589589
us-gaap:Goodwill █████████████▁▁▁▁▁▁▁▁▁▁45934593459345934593459345934593459345934593459345933513351335243524352435243524352435243524
us-gaap:FiniteLivedIntangibleAssetsNet ▁▂▂▃▃▄▄▅▅▆▇▇█▁▁▂25333843525864788694106116127182228NANANANANANANA
  2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-30
  2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-30
us-gaap:LongTermDebt ▃▄▄▅▆▅▆▆▄▅██████▆▄▃▁▁▂▁63217002765584769140838285918577764980871021110328103411017410175105099061739162515121512253944969
 us-gaap:LongTermDebt us-gaap:FairValueByFairValueHierarchyLevel,us-gaap:FairValueByMeasurementBasis us-gaap:FairValueInputsLevel2,us-gaap:EstimateOfFairValueFairValueDisclosure▁▅█623370567703NANANANANANANANANANANANANANANANANANANANA
 us-gaap:LongTermDebt us-gaap:FairValueByMeasurementBasis us-gaap:CarryingReportedAmountFairValueDisclosure▃▃▄▅▆▅▆▅▄▅██████▆▄▂▁63217002765584769140838285918577764980871021110328103411017410175105099061739162515121NANANA
 us-gaap:LongTermDebt us-gaap:FairValueByMeasurementBasis us-gaap:EstimateOfFairValueFairValueDisclosure▂▃▄▅▆▅▅▅▄▅███▇▇█▆▄▂▁62337056770385119160839285988630767681041027710382103381021910219106419214754963885257NANANA
 us-gaap:LongTermDebt us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName,us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable mtb:BayviewFinancial,mtb:SyndicatedLoanFacility▁▂█▃▄▄▄690714826738750750750NA750NANANANANANANANANANANANANANA
  2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-30
us-gaap:StockholdersEquity ▇▇▇▇▇▇▇██████▄▄▄▄▃▃▂▂▂▁158151577915691155871543615577157091631816283162131634016471163551292112667125281233312168118861101610716104229945
 us-gaap:StockholdersEquity us-gaap:StatementEquityComponents us-gaap:AdditionalPaidInCapital█████████████▂▂▂▂▂▁▁▁▁6588658465776568658565796572659866046603668966906683351134773445337733473302319231123061NA
 us-gaap:StockholdersEquity us-gaap:StatementEquityComponents us-gaap:RetainedEarnings██▇▇▆▆▅▅▄▄▄▃▃▃▃▂▂▂▂▁▁▁12837124901216211842111281076310404990996859437902188018596827381077934764274817309707468876645NA
us-gaap:CommonStockValue █████████████▂▂▂▂▂▂▂▁▁▁7979797979797979797979797966666666656565646463
us-gaap:RetainedEarningsAccumulatedDeficit ██▇▇▆▆▅▅▅▄▄▄▃▃▃▃▂▂▂▂▂▁▁128371249012162118421112810763104049909968594379021880185968273810779347642748173097074688766456286
us-gaap:TreasuryStockValue █▇▇▆▅▄▃▂▁▁515045464247384830482560209612541050849NANANANANANANANANANANANANA
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax █▅▅▃▁▁▂▄▄▃▅▅▅▅▄▅▆▆▆▄▄▄▄209-80-112-288-542-517-483-247-270-291-114-101-150-163-217-1521240-25-198-227-225-230
  2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-30
us-gaap:NetCashProvidedByUsedInOperatingActivities ▁▇▃▅█▃▅▅-39474666413101837484442NANANANANANANANANANA561-112-81698-170
us-gaap:NetCashProvidedByUsedInInvestingActivities ▁▂▅▇██▆▇-3852-3418-852271873911-248514NANANANANANANANANANA-3441229-419-371329
us-gaap:NetCashProvidedByUsedInFinancingActivities █▇▄▂▁▂▃▂41083219789-1022-1949-872-363-934NANANANANANANANANANA2970468150-48741
  2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-30
us-gaap:NetCashProvidedByUsedInOperatingActivities ▁▇▃▅█▃▅▅-39474666413101837484442NANANANANANANANANANA561-112-81698-170
us-gaap:NetIncomeLoss ▂▇▇▇█▇▄▄▅▄▄▄▃▂▂▁▂▂▁▃▄▂▃268480473482526493352355381348349336298280286241275284229294348274293
 us-gaap:NetIncomeLoss us-gaap:StatementBusinessSegments mtb:BusinessBanking▄█▇▇▇▇▅▄▃▁▁▁▂▂▂▂▄▃▃▂▄▄▆3246424343433731282221222523252430272826303238
 us-gaap:NetIncomeLoss us-gaap:StatementBusinessSegments mtb:CommercialBanking█▆▅▆█▆▅▄▃▄▃▃▃▃▃▂▃▃▂▂▁▃▄14313212313214712612510910511210210510110810896101105999787107112
 us-gaap:NetIncomeLoss us-gaap:StatementBusinessSegments mtb:CommercialRealEstateSegment▆█▇▆▆▆▅▄▃▂▃▂▂▂▂▂▁▁▁▂11713112111711611210897878490848085798078757479NA7675
 us-gaap:NetIncomeLoss us-gaap:StatementBusinessSegments mtb:RetailBanking▆▇████▇▅▅▄▃▄▃▃▃▃▁▁▁▂▂▂▃110131140145141143123961008169716364686832322953515258
us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet ▆▃▄█▇▃▁▃▃▄▁▇▃▃▄▆▅▇▃▂▆▃█73-69-26171129-90-165-59-500-145102-70-50-40806140-57-9560-80169
  2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-30
us-gaap:NetCashProvidedByUsedInInvestingActivities ▁▂▅▇██▆▇-3852-3418-852271873911-248514NANANANANANANANANANA-3441229-419-371329
  2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-30
us-gaap:NetCashProvidedByUsedInFinancingActivities █▇▄▂▁▂▃▂41083219789-1022-1949-872-363-934NANANANANANANANANANA2970468150-48741
us-gaap:RepaymentsOfLongTermDebt ▅▄▅▁▁▂▄▂██▂▁▃▁▃▁▁▁▃▁▂▁▅753675875112025043011326140110453171321113835212533720
us-gaap:PaymentsForRepurchaseOfCommonStock ▄▃▄▄▅▅█▂▂▆▄▂▁373299401365498475720224224532350154100NANANANANANANANANANA
  2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-30
us-gaap:RepaymentsOfLongTermDebt ▅▄▅▁▁▂▄▂██▂▁▃▁▃▁▁▁▃▁▂▁▅753675875112025043011326140110453171321113835212533720

Common Stock Value

us-gaap:CommonStockValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-312009-12-312008-12-31
Value797979797979797979797979797979797979666666666665656565646464636363626262606060606060
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.1

Common Stock Par Or Stated Value Per Share

Shares Outstanding

Common Stock Shares Issued

us-gaap:CommonStockSharesIssued



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-312009-12-312008-12-31
Value159159159159159159159159159159159159159159159159159159133133132132132131131130130129128128127126126125125125120120120120120120
Percentage of CommonStockSharesIssued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Common Stock Shares Authorized

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-09-302009-03-31
Value129132135137142144148151153154156158159133133132132131131130129128126125125124122119119118118117110
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-09-302009-03-31
Value129132135137142144148151152154155157158132132132131130130129128127125125125124122119118118117117110
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-03-31
Value1.933.59999999999999963.473.343.353.743.543.262.242.01000000000000072.222.362.131.97999999999999952.11.981.741.631.941.991.661.92999999999999971.921.991.631.56999999999999942.132.562.02.18000000000000062.181.711.51.03000000000000021.322.431.591.59999999999999961.491.471.161.05999999999999980.970.49
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-03-31
Value1.933.593.473.343.353.743.533.262.232.0099999999999992.212.352.121.98000000000000042.11.981.731.621.931.981.651.921.911.981.611.55999999999999962.112.551.982.172.171.711.51.02999999999999941.322.421.591.59000000000000071.481.461.151.050.970.49
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Revenue From Contract With Customer Including Assessed Tax

us-gaap:ProductOrService

us-gaap:RevenueFromContractWithCustomerIncludingAssessedTax

us-gaap:DepositAccount



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value106110111107103108108106105107109106
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues us-gaap:DepositAccount0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:FiduciaryAndTrust



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value148151143144132135133137131129124126
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax140.1136.5129.5134.0128.8124.1122.9128.9125.0120.3114.2119.6
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues us-gaap:FiduciaryAndTrust0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:MortgageBanking



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value1271181371079592889287969686
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax120.5106.4123.399.692.484.881.486.683.189.388.581.2
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues us-gaap:MortgageBanking0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

mtb:BayviewLendingGroupAndBayviewFinancial



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value333333444
Percentage of RevenueFromContractWithCustomerIncludingAssessedTax2.82.72.72.82.92.83.73.73.8
Percentage of Revenues0.00.00.00.00.00.00.00.00.0
Percentage of Revenues mtb:BayviewLendingGroupAndBayviewFinancial0.00.00.00.00.00.00.00.00.0

Revenues

us-gaap:ConsolidationItems

us-gaap:Revenues

us-gaap:OperatingSegments



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-30
Value15061557155315501488146614341416139913611349131212921132118010991120112510761150118610881108
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues us-gaap:OperatingSegments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:IntersegmentElimination, mtb:BusinessBanking



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-30
Value00100000101101111111111
Percentage of Revenues0.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.1
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues us-gaap:IntersegmentElimination mtb:BusinessBanking100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IntersegmentElimination, mtb:CommercialBanking



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-30
Value10000000000011111111111
Percentage of Revenues0.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.1
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues us-gaap:IntersegmentElimination mtb:CommercialBanking100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IntersegmentElimination, mtb:CommercialRealEstateSegment



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-03-312012-09-30
Value0000000000000000000015
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.10.5
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues us-gaap:IntersegmentElimination mtb:CommercialRealEstateSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IntersegmentElimination, mtb:DiscretionaryPortfolio



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-30
Value-13-10-9-9-10-10-10-12-12-12-14-14-14-5-5-5-5-5-5-19-10-8-25
Percentage of Revenues-0.9-0.7-0.6-0.6-0.7-0.7-0.8-0.9-0.9-0.9-1.1-1.1-1.1-0.5-0.5-0.5-0.5-0.5-0.5-1.7-0.8-0.8-2.3
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues us-gaap:IntersegmentElimination mtb:DiscretionaryPortfolio100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IntersegmentElimination, mtb:ResidentialMortgageBanking



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-30
Value211917141516151818182221191212111211915211828
Percentage of Revenues1.41.21.10.91.01.11.11.31.31.31.61.61.51.11.11.01.11.00.91.31.81.72.6
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues us-gaap:IntersegmentElimination mtb:ResidentialMortgageBanking100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IntersegmentElimination, mtb:RetailBanking



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-30
Value01222222333333333333332
Percentage of Revenues0.00.10.20.20.20.20.20.20.20.20.20.20.20.30.30.30.30.30.30.30.30.30.3
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues us-gaap:IntersegmentElimination mtb:RetailBanking100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IntersegmentElimination, us-gaap:AllOtherSegments



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-30
Value-10-12-12-9-10-10-9-11-10-10-12-12-10-13-12-11-13-13-10-2-18
Percentage of Revenues-0.7-0.8-0.8-0.6-0.7-0.7-0.7-0.8-0.8-0.8-0.9-0.9-0.8-1.2-1.1-1.0-1.2-1.2-1.0-0.2-1.5
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues us-gaap:IntersegmentElimination us-gaap:AllOtherSegments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, mtb:BusinessBanking



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value137141143140139143138136127130124115136116114113114112111108108107104102108107106105114114
Percentage of Revenues9.20.09.29.19.00.09.39.38.99.28.98.50.08.68.78.80.09.99.49.90.09.69.39.50.09.49.09.70.010.3
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues us-gaap:OperatingSegments mtb:BusinessBanking100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, mtb:CommercialBanking



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value291290282278267294280269266267277273272268265253269270257246254249252248261257252249265255
Percentage of Revenues19.40.018.217.917.20.018.918.418.618.919.820.10.019.920.219.60.023.921.822.40.022.222.423.10.022.421.322.90.023.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues us-gaap:OperatingSegments mtb:CommercialBanking100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, mtb:CommercialRealEstateSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-03-312012-12-312012-09-30
Value223224238225219226214205202212197195212205192177184181178163166170164158177171165173169
Percentage of Revenues14.80.015.314.514.10.014.414.014.115.014.114.30.015.214.613.70.016.015.214.90.015.214.614.70.014.915.20.015.3
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues us-gaap:OperatingSegments mtb:CommercialRealEstateSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, mtb:DiscretionaryPortfolio



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value49605060635653585065727847114988664132015291729242244-141211
Percentage of Revenues3.30.03.33.94.10.03.64.03.54.65.15.80.08.57.56.70.01.21.71.40.01.62.72.30.03.8-1.21.10.00.2
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues us-gaap:OperatingSegments mtb:DiscretionaryPortfolio100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, mtb:ResidentialMortgageBanking



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value12511711596837579828290889363108103968999112111105110110949992111119138138
Percentage of Revenues8.30.07.46.25.40.05.35.65.76.46.36.90.08.07.97.50.08.89.510.10.09.89.88.80.08.09.411.00.012.5
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues us-gaap:OperatingSegments mtb:ResidentialMortgageBanking100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, mtb:RetailBanking



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value402417432436430433427420393392383361392353345339327308305300272274268261285314292291313318
Percentage of Revenues26.70.027.828.127.80.028.728.727.427.727.426.50.026.226.326.20.027.225.927.30.024.523.924.30.027.324.726.70.028.7
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues us-gaap:OperatingSegments mtb:RetailBanking100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, us-gaap:AllOtherSegments



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-30
Value275294315346294293311257254242182192225146194154194194132163248
Percentage of Revenues18.318.920.322.319.820.021.718.218.217.813.614.617.412.916.514.017.317.312.314.221.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues us-gaap:OperatingSegments us-gaap:AllOtherSegments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Interest Expense

us-gaap:InterestExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-03-31
Value1431771991961761611381201061021009291107111106100957777787473656667697273778289939710310298108116117120133152206
Percentage of InterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Interest Expense Long Term Debt

us-gaap:InterestExpenseLongTermDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-03-31
Value40495666677066585350474446565858576462626459584950494950505153596160626159646968687077100
Percentage of InterestExpenseLongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value-23-10000-21001000-10001-2-1-10001000000000
Percentage of OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value349652635625634699696654457628580596518510550530467411434453375380425427354
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-03-31
Value801591541521511531701611053062242151691792001941691401541661331421361291131061491821411491521181015581125102102949068644419
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Income Taxes Paid Net

us-gaap:IncomeTaxesPaidNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-03-31
Value441859931491772113737321412912913833191-86514713688821311934571042169133681958-564118977726913014-11-67
Percentage of IncomeTaxesPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Profit Loss

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value68536651264861466850145825027037840235115033638539918233422127084247349267
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value416-12632175132122-24-34-102-5122213-180-1349101-8854-6528-193-276538
Percentage of ComprehensiveIncomeNetOfTax60.8-34.56.427.021.518.3-4.9-7.6-41.0-19.25.95.30.9-119.7-4.012.825.4-48.216.2-29.310.6-230.1-11.218.714.5
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value268493480473482546526493352322355381348330349336298270280286241277275284229
Percentage of ComprehensiveIncomeNetOfTax39.2134.593.673.078.581.7104.9107.6141.0119.294.194.799.1219.7104.087.274.6148.283.8129.389.4330.1111.281.385.5
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest

Net Income Loss

us-gaap:NetIncomeLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-03-31
Value26849348047348254652649335232235538134833034933629827028028624127727528422922129434827429629323320614718332220620419218815013612764
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:StatementBusinessSegments

mtb:BusinessBanking



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value32464243434337312822342122253523252412302728212630323638
Percentage of NetIncomeLoss12.29.68.99.08.38.710.78.87.56.410.36.16.88.513.18.68.810.34.311.29.812.59.69.08.811.912.213.1
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues mtb:BusinessBanking0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

mtb:CommercialBanking



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value143132123132147126125109105112101102105101117108108969610110599999787107116112
Percentage of NetIncomeLoss53.527.626.127.428.125.635.630.827.732.330.829.431.433.943.538.737.739.934.637.037.143.644.933.025.039.239.238.4
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues mtb:CommercialBanking0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

mtb:CommercialRealEstateSegment



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-03-312012-12-312012-09-30
Value1171311211171161121089787849590848090857980857875747579768475
Percentage of NetIncomeLoss43.727.325.724.322.122.930.727.322.924.228.925.725.027.033.330.427.833.130.928.626.632.634.327.027.928.425.9
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues mtb:CommercialRealEstateSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

mtb:DiscretionaryPortfolio



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value252938393929193129331250463937510513814111025-81-5-5
Percentage of NetIncomeLoss9.56.28.08.17.65.95.68.97.89.73.614.513.813.413.81.83.82.55.03.05.34.95.08.6-2.30.7-1.7-1.7
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues mtb:DiscretionaryPortfolio0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

mtb:ResidentialMortgageBanking



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value2415712131514131314-4221917-121273112252719181234344044
Percentage of NetIncomeLoss9.23.31.62.72.53.14.23.83.64.3-1.46.65.95.7-0.47.59.713.24.59.19.78.58.24.39.812.513.715.2
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues mtb:ResidentialMortgageBanking0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

mtb:RetailBanking



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value11013114014514114312396100819069716385646868178323229245351525558
Percentage of NetIncomeLoss41.027.429.730.126.929.035.027.126.323.527.319.921.321.231.623.124.028.564.411.911.313.011.118.314.819.118.819.9
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues mtb:RetailBanking0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AllOtherSegments



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value-185-60-72323-76-2315-11-7-13-29-94-28-33-66-120-2-1-66-176063
Percentage of NetIncomeLoss-69.1-1.5-0.1-1.54.54.8-21.8-6.74.2-0.40.4-2.1-4.1-9.8-35.0-10.1-11.8-27.5-43.5-0.8-0.4-29.0-79.7-0.218.1
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues us-gaap:AllOtherSegments0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Income Loss Available To Common Stockholders Basic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-03-31
Value25047346145246252550547233230233536032830732631227524825726321825425126021120327532825527627321418812916429719018917617313812211355
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Income Loss Available To Common Stockholders Diluted

us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value250473461452462525505472332302335360328307326312275248257263218254251260211203275328255276273214188129164297190189176173136122113
Percentage of NetIncomeLossAvailableToCommonStockholdersDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Assets

us-gaap:Assets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-312009-12-312008-12-31
Value124577119872125500121554120025120097116827118426118622118593120401120896123223123449126841123820124625122787977979708098377966859722890835885308516284427832298281183008810858080779186779247786377727678816802168246684396888065815
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities

us-gaap:VariableInterestEntityPrimaryBeneficiary



Period End2020-03-312019-12-312018-12-31
Value160015001100
Percentage of Assets1.31.30.9
Percentage of Assets1.31.30.9
Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary100.0100.0100.0

Liabilities

us-gaap:Liabilities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-312009-12-312008-12-31
Value108762104156109721105863104437104637101391102848102913102342104083104613107010106962110500107349108270106614848758441285849843498489578666766437385673411725127238972806711397117769758686536848868482593735966360015605236112759031
Percentage of Liabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets87.386.987.487.187.087.186.886.886.886.386.486.586.886.687.186.786.986.886.887.087.387.287.386.686.686.787.087.187.487.787.788.188.188.188.088.187.587.787.988.488.789.7

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-312009-12-312008-12-31
Value124577119872125500121554120025120097116827118426118622118593120401120896123223123449126841123820124625122787977979708098377966859722890835885308516284427832298281183008810858080779186779247786377727678816802168246684396888065815
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-312009-12-312008-12-31
Value158151571615779156911558715460154361557715709162501631816283162131648616340164711635516173129211266712528123351233312168118861130511016107161042210202994596299428927193759244850783578231791577526784
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets12.713.112.612.913.012.913.213.213.213.713.613.513.213.412.913.313.113.213.213.012.712.812.713.413.413.313.012.912.612.312.311.911.911.912.011.912.512.312.111.611.310.3

us-gaap:InvestmentType

us-gaap:SecuritiesInvestment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-31
Value13437296-62-147-228-198-161-44-1648
Percentage of StockholdersEquity0.90.20.20.0-0.4-1.0-1.5-1.3-1.0-0.3-0.10.3
Percentage of Assets0.10.00.00.0-0.1-0.1-0.2-0.2-0.1-0.0-0.00.0
Percentage of Assets us-gaap:SecuritiesInvestment0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:StatementEquityComponents

mtb:CommonStockIssuable



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-312010-12-31
Value11111111111112222222222222222344
Percentage of StockholdersEquity0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.1
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets mtb:CommonStockIssuable0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedDefinedBenefitPlansAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-312014-12-312013-12-31
Value-333-342-252-255-259-261-283-290-297-304-260-264-268-272-285-296-305-98
Percentage of StockholdersEquity-2.1-2.2-1.6-1.6-1.7-1.7-1.8-1.9-1.9-1.9-1.6-1.6-1.7-1.7-1.7-1.8-2.5-0.9
Percentage of Assets-0.3-0.3-0.2-0.2-0.2-0.2-0.2-0.2-0.3-0.3-0.2-0.2-0.2-0.2-0.2-0.2-0.3-0.1
Percentage of Assets us-gaap:AccumulatedDefinedBenefitPlansAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges



Period End2020-03-312019-12-31
Value40898
Percentage of StockholdersEquity2.60.6
Percentage of Assets0.30.1
Percentage of Assets us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges0.00.0

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-312010-12-31
Value209-206-80-112-288-420-542-517-483-363-247-270-291-294-114-101-150-251-163-217-152-1801240-25-64-198-227-225-240-356-205
Percentage of StockholdersEquity1.3-1.3-0.5-0.7-1.8-2.7-3.5-3.3-3.1-2.2-1.5-1.7-1.8-1.8-0.7-0.6-0.9-1.6-1.3-1.7-1.2-1.50.10.3-0.2-0.6-1.8-2.1-2.2-2.4-3.8-2.5
Percentage of Assets0.2-0.2-0.1-0.1-0.2-0.3-0.5-0.4-0.4-0.3-0.2-0.2-0.2-0.2-0.1-0.1-0.1-0.2-0.2-0.2-0.2-0.20.00.0-0.0-0.1-0.2-0.3-0.3-0.3-0.5-0.3
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-312010-12-31
Value65886593658465776568657965856579657265906598660466036676668966906683668035113477344534093377334733023232319231123061302528282398
Percentage of StockholdersEquity41.742.041.741.942.142.642.742.241.840.640.440.640.740.540.940.640.941.327.227.527.527.627.427.527.828.629.029.029.429.730.528.7
Percentage of Assets5.35.55.25.45.55.55.65.65.55.65.55.55.45.45.35.45.45.43.63.63.53.53.53.73.73.83.83.73.73.63.63.5
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-312010-12-31
Value7979797979797979797979797979797979796666666666656565656464646260
Percentage of StockholdersEquity0.50.50.50.50.50.50.50.50.50.50.50.50.50.50.50.50.50.50.50.50.50.50.50.50.60.60.60.60.60.60.70.7
Percentage of Assets0.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.1
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:PreferredStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-312010-12-31
Value1250125012501231123112311231123112311231123112311231123112311231123112311231123112311231123112311231881879876874872864740
Percentage of StockholdersEquity7.98.07.97.87.98.08.07.97.87.67.57.67.67.57.57.57.57.69.59.79.810.010.010.110.47.88.08.28.48.69.38.9
Percentage of Assets1.01.01.01.01.01.01.11.01.01.01.01.01.01.01.01.01.01.01.31.31.31.31.31.41.41.01.01.11.11.11.11.1
Percentage of Assets us-gaap:PreferredStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-312010-12-31
Value128371282012490121621184211516111281076310404101649909968594379222902188018596843082738107793478077642748173097188707468876645647758675426
Percentage of StockholdersEquity81.281.679.277.576.074.572.169.166.262.560.759.558.255.955.253.452.652.164.064.063.363.362.061.561.563.664.264.363.863.563.364.9
Percentage of Assets10.310.710.010.09.99.69.59.18.88.68.28.07.77.57.17.16.96.98.58.48.18.17.98.28.38.48.48.38.07.87.58.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TreasuryStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312010-12-31
Value-5150-4822-4546-4247-3848-3528-3048-2560-2096-1454-1254-1050-849-431-569-233-88-67
Percentage of StockholdersEquity-32.6-30.7-28.8-27.1-24.7-22.8-19.7-16.4-13.3-8.9-7.7-6.4-5.2-2.6-3.5-1.4-0.5-0.8
Percentage of Assets-4.1-4.0-3.6-3.5-3.2-2.9-2.6-2.2-1.8-1.2-1.0-0.9-0.7-0.3-0.4-0.2-0.1-0.1
Percentage of Assets us-gaap:TreasuryStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Cash

Cash And Cash Equivalents At Carrying Value

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis

us-gaap:CashAndCashEquivalentsAtCarryingValue

us-gaap:FairValueInputsLevel1, us-gaap:EstimateOfFairValueFairValueDisclosure



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value12561394176512141528
Percentage of CashAndCashEquivalentsAtCarryingValue100.0100.0100.0100.0100.0
Percentage of Assets1.01.21.41.01.3
Percentage of Assets us-gaap:FairValueInputsLevel1 us-gaap:EstimateOfFairValueFairValueDisclosure0.00.00.00.00.0

us-gaap:FairValueInputsLevel2, us-gaap:EstimateOfFairValueFairValueDisclosure



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value4137535677
Percentage of CashAndCashEquivalentsAtCarryingValue3.32.73.04.75.0
Percentage of Assets0.00.00.00.00.1
Percentage of Assets us-gaap:FairValueInputsLevel2 us-gaap:EstimateOfFairValueFairValueDisclosure0.00.00.00.00.0

us-gaap:FairValueByMeasurementBasis

us-gaap:CarryingReportedAmountFairValueDisclosure



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value1298143218181271126716051311136912921420136813451286132013321284117813681249135013661373152319171763167220591986
Percentage of CashAndCashEquivalentsAtCarryingValue103.3102.7103.0104.70.0105.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets1.01.21.41.01.11.31.11.21.11.21.11.11.01.11.11.00.91.11.31.41.41.41.62.12.02.02.42.4
Percentage of Assets us-gaap:CarryingReportedAmountFairValueDisclosure0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:EstimateOfFairValueFairValueDisclosure



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value1298143218181271126716051311136912921420136813451286132013321284117813681249135013661373152319171763167220591986
Percentage of CashAndCashEquivalentsAtCarryingValue103.3102.7103.0104.70.0105.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets1.01.21.41.01.11.31.11.21.11.21.11.11.01.11.11.00.91.11.31.41.41.41.62.12.02.02.42.4
Percentage of Assets us-gaap:EstimateOfFairValueFairValueDisclosure0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Land

Property Plant And Equipment Gross

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-312009-12-312008-12-31
Value11541140107410661044647634637628646656673672675660658662666581590602612612625627633614595589594589592580581569567431435421427435388
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.91.00.90.90.90.50.50.50.50.50.50.60.50.50.50.50.50.50.60.60.60.60.60.70.70.70.70.70.70.70.70.70.70.70.70.70.60.60.60.60.60.6

Goodwill

us-gaap:Goodwill



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-05-312011-03-312010-12-312010-09-302010-03-312009-12-312008-12-31
Value4593459345934593459345934593459345934593459345934593459345934593459345933513351335243524352435243524352435243524352435243524352435243524352435240352435243524352435243192
Percentage of Goodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.73.83.73.83.83.83.93.93.93.93.83.83.73.73.63.73.73.73.63.63.63.63.63.94.04.14.24.24.34.24.34.44.54.54.54.50.05.25.25.25.25.14.9

Intangible Assets Net Excluding Goodwill

Finite Lived Intangible Assets Net

us-gaap:FiniteLivedIntangibleAssetsNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312013-12-312012-12-312011-12-312010-12-312009-12-31
Value25293338434752586471788694971061161271401822283568115176125182
Percentage of FiniteLivedIntangibleAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.10.10.10.10.10.10.10.10.10.10.00.00.00.00.10.10.20.20.3

Deferred Tax Assets Liabilities Net

Long Term Debt

us-gaap:LongTermDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-312009-12-312008-12-31
Value6321698670027655847684449140838285918141857776498087949310211103281034110653101741017510509900690617391625151085121512253944607496956876476668667487128730578408991100651024012075
Percentage of LongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets5.15.85.66.37.17.07.87.17.26.97.16.36.67.78.18.38.38.710.410.510.79.39.38.17.16.06.16.26.55.66.17.08.28.68.79.210.811.513.214.714.918.3

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis

us-gaap:FairValueInputsLevel2, us-gaap:EstimateOfFairValueFairValueDisclosure



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value62337063705677038385
Percentage of LongTermDebt98.6101.1100.8100.699.3
Percentage of Assets5.05.95.66.37.0
Percentage of Assets us-gaap:FairValueInputsLevel2 us-gaap:EstimateOfFairValueFairValueDisclosure0.00.00.00.00.0

us-gaap:FairValueByMeasurementBasis

us-gaap:CarryingReportedAmountFairValueDisclosure



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value63216986700276558476844491408382859181418577764980879493102111032810341106531017410175105099006906173916251510851214607
Percentage of LongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets5.15.85.66.37.17.07.87.17.26.97.16.36.67.78.18.38.38.710.410.510.79.39.38.17.16.06.15.6
Percentage of Assets us-gaap:CarryingReportedAmountFairValueDisclosure0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:EstimateOfFairValueFairValueDisclosure



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value62337063705677038511838591608392859881938630767681049473102771038210338106391021910219106419139921475496388524452574768
Percentage of LongTermDebt98.6101.1100.8100.6100.499.3100.2100.1100.1100.6100.6100.4100.299.8100.6100.5100.099.9100.4100.4101.3101.5101.7102.1102.2102.7102.7103.5
Percentage of Assets5.05.95.66.37.17.07.87.17.26.97.26.36.67.78.18.48.38.710.410.510.89.59.58.37.26.26.25.7
Percentage of Assets us-gaap:EstimateOfFairValueFairValueDisclosure0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

mtb:BayviewFinancial, mtb:SyndicatedLoanFacility



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-06-30
Value690702714826738900750750750750
Percentage of LongTermDebt10.910.010.210.88.710.78.28.98.79.8
Percentage of Assets0.60.60.60.70.60.70.60.60.60.6
Percentage of Assets mtb:BayviewFinancial mtb:SyndicatedLoanFacility0.00.00.00.00.00.00.00.00.00.0

us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:StatementEquityComponents

mtb:BayviewFinancial, mtb:SyndicatedLoanFacility, us-gaap:Parent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value85889011294127909090888888
Percentage of LongTermDebt1.31.31.31.51.11.51.01.11.01.11.01.2
Percentage of Assets0.10.10.10.10.10.10.10.10.10.10.10.1
Percentage of Assets mtb:BayviewFinancial mtb:SyndicatedLoanFacility us-gaap:Parent0.00.00.00.00.00.00.00.00.00.00.00.0

Stockholders Equity

us-gaap:StockholdersEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-312009-12-312008-12-31
Value158151571615779156911558715460154361557715709162501631816283162131648616340164711635516173129211266712528123351233312168118861130511016107161042210202994596299428927193759244850783578231791577526784
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets12.713.112.612.913.012.913.213.213.213.713.613.513.213.412.913.313.113.213.213.012.712.812.713.413.413.313.012.912.612.312.311.911.911.912.011.912.512.312.111.611.310.3

us-gaap:InvestmentType

us-gaap:SecuritiesInvestment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312015-12-31
Value13437296-62-147-228-198-161-44-1648
Percentage of StockholdersEquity0.90.20.20.0-0.4-1.0-1.5-1.3-1.0-0.3-0.10.3
Percentage of Assets0.10.00.00.0-0.1-0.1-0.2-0.2-0.1-0.0-0.00.0
Percentage of Assets us-gaap:SecuritiesInvestment0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:StatementEquityComponents

mtb:CommonStockIssuable



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-312010-12-31
Value11111111111112222222222222222344
Percentage of StockholdersEquity0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.1
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets mtb:CommonStockIssuable0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedDefinedBenefitPlansAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-312014-12-312013-12-31
Value-333-342-252-255-259-261-283-290-297-304-260-264-268-272-285-296-305-98
Percentage of StockholdersEquity-2.1-2.2-1.6-1.6-1.7-1.7-1.8-1.9-1.9-1.9-1.6-1.6-1.7-1.7-1.7-1.8-2.5-0.9
Percentage of Assets-0.3-0.3-0.2-0.2-0.2-0.2-0.2-0.2-0.3-0.3-0.2-0.2-0.2-0.2-0.2-0.2-0.3-0.1
Percentage of Assets us-gaap:AccumulatedDefinedBenefitPlansAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges



Period End2020-03-312019-12-31
Value40898
Percentage of StockholdersEquity2.60.6
Percentage of Assets0.30.1
Percentage of Assets us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges0.00.0

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-312010-12-31
Value209-206-80-112-288-420-542-517-483-363-247-270-291-294-114-101-150-251-163-217-152-1801240-25-64-198-227-225-240-356-205
Percentage of StockholdersEquity1.3-1.3-0.5-0.7-1.8-2.7-3.5-3.3-3.1-2.2-1.5-1.7-1.8-1.8-0.7-0.6-0.9-1.6-1.3-1.7-1.2-1.50.10.3-0.2-0.6-1.8-2.1-2.2-2.4-3.8-2.5
Percentage of Assets0.2-0.2-0.1-0.1-0.2-0.3-0.5-0.4-0.4-0.3-0.2-0.2-0.2-0.2-0.1-0.1-0.1-0.2-0.2-0.2-0.2-0.20.00.0-0.0-0.1-0.2-0.3-0.3-0.3-0.5-0.3
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-312010-12-31
Value65886593658465776568657965856579657265906598660466036676668966906683668035113477344534093377334733023232319231123061302528282398
Percentage of StockholdersEquity41.742.041.741.942.142.642.742.241.840.640.440.640.740.540.940.640.941.327.227.527.527.627.427.527.828.629.029.029.429.730.528.7
Percentage of Assets5.35.55.25.45.55.55.65.65.55.65.55.55.45.45.35.45.45.43.63.63.53.53.53.73.73.83.83.73.73.63.63.5
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-312010-12-31
Value7979797979797979797979797979797979796666666666656565656464646260
Percentage of StockholdersEquity0.50.50.50.50.50.50.50.50.50.50.50.50.50.50.50.50.50.50.50.50.50.50.50.50.60.60.60.60.60.60.70.7
Percentage of Assets0.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.1
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:PreferredStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-312010-12-31
Value1250125012501231123112311231123112311231123112311231123112311231123112311231123112311231123112311231881879876874872864740
Percentage of StockholdersEquity7.98.07.97.87.98.08.07.97.87.67.57.67.67.57.57.57.57.69.59.79.810.010.010.110.47.88.08.28.48.69.38.9
Percentage of Assets1.01.01.01.01.01.01.11.01.01.01.01.01.01.01.01.01.01.01.31.31.31.31.31.41.41.01.01.11.11.11.11.1
Percentage of Assets us-gaap:PreferredStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-312010-12-31
Value128371282012490121621184211516111281076310404101649909968594379222902188018596843082738107793478077642748173097188707468876645647758675426
Percentage of StockholdersEquity81.281.679.277.576.074.572.169.166.262.560.759.558.255.955.253.452.652.164.064.063.363.362.061.561.563.664.264.363.863.563.364.9
Percentage of Assets10.310.710.010.09.99.69.59.18.88.68.28.07.77.57.17.16.96.98.58.48.18.17.98.28.38.48.48.38.07.87.58.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TreasuryStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312010-12-31
Value-5150-4822-4546-4247-3848-3528-3048-2560-2096-1454-1254-1050-849-431-569-233-88-67
Percentage of StockholdersEquity-32.6-30.7-28.8-27.1-24.7-22.8-19.7-16.4-13.3-8.9-7.7-6.4-5.2-2.6-3.5-1.4-0.5-0.8
Percentage of Assets-4.1-4.0-3.6-3.5-3.2-2.9-2.6-2.2-1.8-1.2-1.0-0.9-0.7-0.3-0.4-0.2-0.1-0.1
Percentage of Assets us-gaap:TreasuryStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Value

us-gaap:CommonStockValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-312009-12-312008-12-31
Value797979797979797979797979797979797979666666666665656565646464636363626262606060606060
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.10.1

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-312009-12-312008-12-31
Value1283712820124901216211842115161112810763104041016499099685943792229021880185968430827381077934780776427481730971887074688766456477628660985969586758235745553454265319513150765062
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets10.310.710.010.09.99.69.59.18.88.68.28.07.77.57.17.16.96.98.58.48.18.17.98.28.38.48.48.38.07.87.87.57.57.57.57.48.28.07.87.57.47.7

Treasury Stock Value

us-gaap:TreasuryStockValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-312009-12-312008-12-31
Value5150482245464247384835283048256020961454125410508494310004671051692251071
Percentage of TreasuryStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0100.0100.0100.0100.0100.0100.0
Percentage of Assets4.14.03.63.53.22.92.62.21.81.21.00.90.70.30.00.00.00.00.10.20.20.31.6

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302008-12-312007-12-31
Value209-206-80-112-288-420-542-517-483-363-247-270-291-294-114-101-150-251-163-217-152-1801240-25-64-198-227-225-240-230-277-331-356-192-228-197-205-192-197-255-335-419-736-114
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.2-0.2-0.1-0.1-0.2-0.3-0.5-0.4-0.4-0.3-0.2-0.2-0.2-0.2-0.1-0.1-0.1-0.2-0.2-0.2-0.2-0.20.00.0-0.0-0.1-0.2-0.3-0.3-0.3-0.3-0.3-0.4-0.5-0.2-0.3-0.3-0.3-0.30.0-0.4-0.50.0-1.10.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-03-31
Value-394113074666413550101837484716442561428-112-8169826-1701055394864229277042622037565311374
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-03-31
Value-38524726-3418-852271-2946873911-2481215514-3441-1641229-419-371-1334329-1372-1683-245-2251252-4122219291-47-178578
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-03-31
Value4108-62403219789-10222690-1949-872-363-1879-9342970825468150-48716714113451036-142-175-994-309-803-196-654-808-63-1067
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-03-31
Value-394113074666413550101837484716442561428-112-8169826-1701055394864229277042622037565311374
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Income Loss

us-gaap:NetIncomeLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-03-31
Value26849348047348254652649335232235538134833034933629827028028624127727528422922129434827429629323320614718332220620419218815013612764
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:StatementBusinessSegments

mtb:BusinessBanking



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value32464243434337312822342122253523252412302728212630323638
Percentage of NetIncomeLoss12.29.68.99.08.38.710.78.87.56.410.36.16.88.513.18.68.810.34.311.29.812.59.69.08.811.912.213.1
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues mtb:BusinessBanking0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

mtb:CommercialBanking



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value143132123132147126125109105112101102105101117108108969610110599999787107116112
Percentage of NetIncomeLoss53.527.626.127.428.125.635.630.827.732.330.829.431.433.943.538.737.739.934.637.037.143.644.933.025.039.239.238.4
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues mtb:CommercialBanking0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

mtb:CommercialRealEstateSegment



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-03-312012-12-312012-09-30
Value1171311211171161121089787849590848090857980857875747579768475
Percentage of NetIncomeLoss43.727.325.724.322.122.930.727.322.924.228.925.725.027.033.330.427.833.130.928.626.632.634.327.027.928.425.9
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues mtb:CommercialRealEstateSegment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

mtb:DiscretionaryPortfolio



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value252938393929193129331250463937510513814111025-81-5-5
Percentage of NetIncomeLoss9.56.28.08.17.65.95.68.97.89.73.614.513.813.413.81.83.82.55.03.05.34.95.08.6-2.30.7-1.7-1.7
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues mtb:DiscretionaryPortfolio0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

mtb:ResidentialMortgageBanking



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value2415712131514131314-4221917-121273112252719181234344044
Percentage of NetIncomeLoss9.23.31.62.72.53.14.23.83.64.3-1.46.65.95.7-0.47.59.713.24.59.19.78.58.24.39.812.513.715.2
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues mtb:ResidentialMortgageBanking0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

mtb:RetailBanking



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value11013114014514114312396100819069716385646868178323229245351525558
Percentage of NetIncomeLoss41.027.429.730.126.929.035.027.126.323.527.319.921.321.231.623.124.028.564.411.911.313.011.118.314.819.118.819.9
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues mtb:RetailBanking0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AllOtherSegments



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value-185-60-72323-76-2315-11-7-13-29-94-28-33-66-120-2-1-66-176063
Percentage of NetIncomeLoss-69.1-1.5-0.1-1.54.54.8-21.8-6.74.2-0.40.4-2.1-4.1-9.8-35.0-10.1-11.8-27.5-43.5-0.8-0.4-29.0-79.7-0.218.1
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Revenues us-gaap:AllOtherSegments0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Profit Loss

Increase Decrease In Other Operating Capital Net

us-gaap:IncreaseDecreaseInOtherOperatingCapitalNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-31
Value73-151-69-26171112129-90-165312-59-50053-145102-70300-50-4080-206140-5743-9560-80-416967-32-16845-21-2-2435-74-80189
Percentage of IncreaseDecreaseInOtherOperatingCapitalNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-03-31
Value-38524726-3418-852271-2946873911-2481215514-3441-1641229-419-371-1334329-1372-1683-245-2251252-4122219291-47-178578
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Payments To Acquire Investments

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-03-31
Value4108-62403219789-10222690-1949-872-363-1879-9342970825468150-48716714113451036-142-175-994-309-803-196-654-808-63-1067
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Proceeds From Issuance Of Long Term Debt

Repayments Of Long Term Debt

us-gaap:RepaymentsOfLongTermDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-03-31
Value7530675875175112025044043011326140169210453178588132115213835221253335272080420259418802528111629285325288520
Percentage of RepaymentsOfLongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Payments For Repurchase Of Common Stock

us-gaap:PaymentsForRepurchaseOfCommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value37328229940136549949847572022422422453237350154100
Percentage of PaymentsForRepurchaseOfCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Repayments Of Long Term Debt

us-gaap:RepaymentsOfLongTermDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-03-31
Value7530675875175112025044043011326140169210453178588132115213835221253335272080420259418802528111629285325288520
Percentage of RepaymentsOfLongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Debt Instrument Interest Rate Stated Percentage

Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number

Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price

Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period

Deferred Tax Liabilities

Unrecognized Tax Benefits

Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions

Operating Lease Right Of Use Asset

Cash And Cash Equivalents Period Increase Decrease

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value129814361819127112671605131113691292142013681345128613201368
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Proceeds From Repayments Of Short Term Debt

Proceeds From Sale Of Short Term Investments

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument

mtb:AssumptionForFairValueOfInterestsContinuedToBeHeldByTransferorServicingAssetsOrLiabilitiesOptionAdjustedBasisSpreadOnVariableRate

us-gaap:FairValueInputsLevel3, us-gaap:ResidentialMortgage



Period End2020-03-31
Value9.0
Percentage of AssumptionForFairValueOfInterestsContinuedToBeHeldByTransferorServicingAssetsOrLiabilitiesOptionAdjustedBasisSpreadOnVariableRate100.0

mtb:CommonSharesOutstandingIncludingCommonStockIssuableAndUnvestedStockBasedCompensationAwards



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value1300133136138-1143145149015215315501561591604134133133013213213101301291290127127127012612412001201191190118
Percentage of CommonSharesOutstandingIncludingCommonStockIssuableAndUnvestedStockBasedCompensationAwards100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mtb:DepreciationAndAmortization1



Period End2020-03-312019-12-312019-03-312018-12-31
Value54545024
Percentage of DepreciationAndAmortization1100.0100.0100.0100.0

us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation, us-gaap:TradingActivityByType

mtb:GainLossOnHedgedItemInFairValueHedge

us-gaap:InterestRateSwap, us-gaap:FairValueHedging, us-gaap:DesignatedAsHedgingInstrument, mtb:FixedRateLongTermBorrowings



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-8718-22-56-34-571213
Percentage of GainLossOnHedgedItemInFairValueHedge100.0100.0100.0100.0100.0100.0100.0100.0

mtb:ImpairedFinancingReceivableNonaccrualInterestIncome



Period End2020-03-312019-03-31
Value1210
Percentage of ImpairedFinancingReceivableNonaccrualInterestIncome100.0100.0

us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

mtb:CommercialFinancialLeasing



Period End2020-03-312019-03-31
Value13
Percentage of ImpairedFinancingReceivableNonaccrualInterestIncome13.829.4

mtb:CommercialRealEstateExcludingResidentialBuilderAndDeveloperAndOtherConstruction



Period End2020-03-312019-03-31
Value11
Percentage of ImpairedFinancingReceivableNonaccrualInterestIncome8.710.5

mtb:HomeEquityLinesAndLoans



Period End2020-03-312019-03-31
Value11
Percentage of ImpairedFinancingReceivableNonaccrualInterestIncome11.612.5

mtb:OtherCommercialConstruction



Period End2020-03-312019-03-31
Value861000.0637000.0
Percentage of ImpairedFinancingReceivableNonaccrualInterestIncome6.86.1

mtb:OtherLoans



Period End2020-03-312019-03-31
Value154000.0122000.0
Percentage of ImpairedFinancingReceivableNonaccrualInterestIncome1.21.2

mtb:RecreationalFinance



Period End2020-03-312019-03-31
Value152000.0142000.0
Percentage of ImpairedFinancingReceivableNonaccrualInterestIncome1.21.4

mtb:ResidentialBuilderAndDeveloper



Period End2020-03-312019-03-31
Value48000.0184000.0
Percentage of ImpairedFinancingReceivableNonaccrualInterestIncome0.41.8

mtb:ResidentialLimitedDocumentation



Period End2020-03-312019-03-31
Value201000.0252000.0
Percentage of ImpairedFinancingReceivableNonaccrualInterestIncome1.62.4

mtb:ResidentialRealEstateExcludingAltA



Period End2020-03-312019-03-31
Value63
Percentage of ImpairedFinancingReceivableNonaccrualInterestIncome54.234.4

us-gaap:AutomobileLoan



Period End2020-03-312019-03-31
Value47000.054000.0
Percentage of ImpairedFinancingReceivableNonaccrualInterestIncome0.40.5

mtb:IncomeAttributableToUnvestedStockBasedCompensationAwardsBasic



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value122222221112222222222323223434432124216-2216-1
Percentage of IncomeAttributableToUnvestedStockBasedCompensationAwardsBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mtb:IncomeAttributableToUnvestedStockBasedCompensationAwardsDiluted



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value122222221112222222222223223434432124222
Percentage of IncomeAttributableToUnvestedStockBasedCompensationAwardsDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mtb:IncreaseDecreaseInEstimatedFairValueOfInterestRateContractsInAssetPosition



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-3-261258-88-1313036235
Percentage of IncreaseDecreaseInEstimatedFairValueOfInterestRateContractsInAssetPosition100.0100.0100.0100.0100.0100.0100.0100.0100.0

mtb:IncreaseDecreaseInEstimatedFairValueOfInterestRateContractsInLiabilityPosition



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-945109-109-158-12247-1-26
Percentage of IncreaseDecreaseInEstimatedFairValueOfInterestRateContractsInLiabilityPosition100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel

mtb:IncreaseDecreaseInFairValueOfNonrecurringFairValueMeasuredLoansForChargeOffsAndImpairmentReserves

us-gaap:FairValueInputsLevel3



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-30
Value-21-25-51-20-20-14-35-21-27-1-16-21-42-29-20-4-27-22-11
Percentage of IncreaseDecreaseInFairValueOfNonrecurringFairValueMeasuredLoansForChargeOffsAndImpairmentReserves100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mtb:IncreaseDecreaseInShortTermBorrowings



Period End2020-03-312019-03-31
Value-3-795
Percentage of IncreaseDecreaseInShortTermBorrowings100.0100.0

mtb:InterestExpensesSavingsAndInterestCheckingDeposits



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value78951049176695648403937302526242016
Percentage of InterestExpensesSavingsAndInterestCheckingDeposits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mtb:InvestmentRepurchaseAgreementAmountToBeReceived1



Period End2020-03-31
Value101
Percentage of InvestmentRepurchaseAgreementAmountToBeReceived1100.0

us-gaap:Range

mtb:MeasurementInputAdjustments

srt:Maximum



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value0.90.00.0-0.0500000000000000440.9-0.0500000000000000440.0
Percentage of MeasurementInputAdjustments100.00.00.0100.0100.0100.00.0

srt:Minimum



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value0.15-0.049999999999999990.00.00.15-0.049999999999999990.0
Percentage of MeasurementInputAdjustments16.70.00.0-0.016.7100.00.0

mtb:NetChangeInAccruedInterestReceivablePayable



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-03-31
Value13-22-3-4035-2335-2014-516-1723-116-18164013-102-50-13371-123125-721101-514-720-4412
Percentage of NetChangeInAccruedInterestReceivablePayable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mtb:NetIncomeLossAvailableToCommonStockholdersBasicBeforeUnvestedStockBasedCompensationAwardsAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value251475463455464528507475334304337362330310329315278250260266221257254263214206278332258280278218191131167301193191179176138124115
Percentage of NetIncomeLossAvailableToCommonStockholdersBasicBeforeUnvestedStockBasedCompensationAwardsAdjustment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mtb:NetIncomeLossAvailableToCommonStockholdersDilutedBeforeUnvestedStockBasedCompensationAwardsAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value251475463455464528507475334304337362330310329315278250260266221257254263214206278332258280278218191131167301193191179176138124115
Percentage of NetIncomeLossAvailableToCommonStockholdersDilutedBeforeUnvestedStockBasedCompensationAwardsAdjustment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mtb:NetIncreaseDecreaseInLoanServicingAdvances



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value-48-136-356022404147115-10-5647564828137-1314424176-143-83-134-122-819-23256-9
Percentage of NetIncreaseDecreaseInLoanServicingAdvances100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mtb:OtherComprehensiveIncomeAmortizationOfDefinedBenefitPlanActuarialLossRecognizedInNetPeriodicBenefitCostNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value1033437778444444459665222266665555
Percentage of OtherComprehensiveIncomeAmortizationOfDefinedBenefitPlanActuarialLossRecognizedInNetPeriodicBenefitCostNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mtb:OtherComprehensiveIncomeAmortizationOfDefinedBenefitPlanActuarialLossRecognizedInNetPeriodicBenefitCostTaxEffect



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value-3-1-1-1-1-2-1422222223231445111144443333
Percentage of OtherComprehensiveIncomeAmortizationOfDefinedBenefitPlanActuarialLossRecognizedInNetPeriodicBenefitCostTaxEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mtb:OtherComprehensiveIncomeLossNetYieldAdjustmentFromCashFlowHedgesBeforeTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-32-19-4465420-1-1
Percentage of OtherComprehensiveIncomeLossNetYieldAdjustmentFromCashFlowHedgesBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

mtb:AccumulatedOther



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-32-19-4465420-1-1
Percentage of OtherComprehensiveIncomeLossNetYieldAdjustmentFromCashFlowHedgesBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mtb:OtherComprehensiveIncomeLossNetYieldAdjustmentFromCashFlowHedgesNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-23-14-334432000
Percentage of OtherComprehensiveIncomeLossNetYieldAdjustmentFromCashFlowHedgesNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mtb:OtherComprehensiveIncomeLossNetYieldAdjustmentFromCashFlowHedgesTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value851-1-1-1-10000
Percentage of OtherComprehensiveIncomeLossNetYieldAdjustmentFromCashFlowHedgesTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mtb:OtherComprehensiveIncomeReclassificationToIncomeOfUnrealizedHoldingLossesBeforeTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value000001000000000101000500000-1-100000000
Percentage of OtherComprehensiveIncomeReclassificationToIncomeOfUnrealizedHoldingLossesBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InvestmentType

us-gaap:SecuritiesInvestment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value000001000
Percentage of OtherComprehensiveIncomeReclassificationToIncomeOfUnrealizedHoldingLossesBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0

mtb:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnHeldToMaturitySecuritiesArisingDuringPeriodNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value00000100000000000000000000000000-1-100-5
Percentage of OtherComprehensiveIncomeUnrealizedHoldingGainLossOnHeldToMaturitySecuritiesArisingDuringPeriodNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.00.0100.0100.0

mtb:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnHeldToMaturitySecuritiesArisingDuringPeriodTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-31
Value000000-1000000000000002000000000000003
Percentage of OtherComprehensiveIncomeUnrealizedHoldingGainLossOnHeldToMaturitySecuritiesArisingDuringPeriodTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0100.0100.0100.00.0100.0100.0

mtb:PaymentsToAcquireEquityAndOtherSecuritiesInvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value17158359357103190124231288063
Percentage of PaymentsToAcquireEquityAndOtherSecuritiesInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Range, us-gaap:FairValueByAssetClass, us-gaap:FairValueByMeasurementFrequency, us-gaap:ValuationTechnique

mtb:PercentageOfFairValueInputsCommitmentExpirations

srt:Maximum, mtb:OtherAssetsAndOtherLiabilities, us-gaap:FairValueMeasurementsRecurring, mtb:DiscountedCashFlows



Period End2020-03-312019-12-312019-09-30
Value1.00.030000000000000027-0.020000000000000018
Percentage of PercentageOfFairValueInputsCommitmentExpirations100.0100.0100.0

srt:WeightedAverage, mtb:OtherAssetsAndOtherLiabilities, us-gaap:FairValueMeasurementsRecurring, mtb:DiscountedCashFlows



Period End2020-03-312019-12-312019-09-30
Value0.160.020000000000000004-0.05
Percentage of PercentageOfFairValueInputsCommitmentExpirations16.066.7250.0

mtb:ProceedsFromSaleOfEquityAndOtherSecuritiesInvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value229129726731211432502540147
Percentage of ProceedsFromSaleOfEquityAndOtherSecuritiesInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship

mtb:ReductionInEstimatedFairValueLossesOnHedgingInstruments

us-gaap:CashFlowHedging



Period End2020-03-312019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-30
Value55965-2723303-1
Percentage of ReductionInEstimatedFairValueLossesOnHedgingInstruments100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueHedging



Period End2020-03-312019-03-312018-12-312018-09-302018-06-302018-03-312017-09-302017-06-30
Value13411-5514128312-2
Percentage of ReductionInEstimatedFairValueLossesOnHedgingInstruments24.018.1205.9645.5368.6273.7358.8193.3

us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

mtb:RevenuesFromSubservicing

mtb:BayviewFinancial



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value373533292828282830292625232525252324263035
Percentage of RevenuesFromSubservicing100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mtb:ShareBasedCompensationExpenseNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value39331110189995588-1185120111015511
Percentage of ShareBasedCompensationExpenseNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

mtb:CommonStockIssuable



Period End2020-03-312019-03-31
Value-274000.0-212000.0
Percentage of ShareBasedCompensationExpenseNet-0.7-1.2

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value-55119-7999-15378-678070111015511
Percentage of ShareBasedCompensationExpenseNet-12.916.495.785.1-42.098.293.195.4-263.465.783.793.0587.498.910.260.11778.299.9100.0100.097.4100.0

us-gaap:RetainedEarnings



Period End2020-03-312019-03-31
Value-102000.0-51000.0
Percentage of ShareBasedCompensationExpenseNet-0.3-0.3

us-gaap:TreasuryStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value4528012500021210550550
Percentage of ShareBasedCompensationExpenseNet113.884.74.314.9142.01.86.94.6363.834.316.37.0-487.91.189.939.9-1354.5

mtb:TaxableEquivalentAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value5555555549887766666656555666666666666656555
Percentage of TaxableEquivalentAdjustment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mtb:UnvestedStockBasedCompensationAwards



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value000000000000101110111011101-11011101113-1112-1
Percentage of UnvestedStockBasedCompensationAwards100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AffordableHousingTaxCreditsAndOtherTaxBenefitsAmount



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value26212120151616161516181414181515141518
Percentage of AffordableHousingTaxCreditsAndOtherTaxBenefitsAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AllowanceForLoanAndLeaseLossesWriteoffsNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value-49413644223815354027244542494124423540213632282931414757364441
Percentage of AllowanceForLoanAndLeaseLossesWriteoffsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivablePortfolioSegment

mtb:CommercialFinancialLeasing



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value-1313810094894521111714-30-3214898
Percentage of AllowanceForLoanAndLeaseLossesWriteoffsNet26.733.624.622.73.225.229.624.024.117.521.248.327.935.034.1-12.92.1-9.453.719.023.229.328.8

us-gaap:CommercialRealEstatePortfolioSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value000900-1231-4-51300-1-1-102610
Percentage of AllowanceForLoanAndLeaseLossesWriteoffsNet1.71.5-1.520.7-2.5-1.0-80.28.82.8-16.2-22.63.19.31.8-0.3-7.7-2.7-4.90.211.416.83.91.4

us-gaap:ConsumerPortfolioSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value-3126262320262221262523182126222637381612191817
Percentage of AllowanceForLoanAndLeaseLossesWriteoffsNet64.664.973.652.792.370.5139.961.166.192.492.641.651.653.154.5107.888.5107.440.760.054.058.863.7

us-gaap:ResidentialPortfolioSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value-30111112212344435222221
Percentage of AllowanceForLoanAndLeaseLossesWriteoffsNet7.00.03.33.97.05.210.76.17.06.38.77.011.210.111.712.812.06.95.39.75.98.06.0

us-gaap:AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value2117171717131313132211111311131111151011101414
Percentage of AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AmortizationOfIntangibleAssets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-03-31
Value345555666778899111294567791010101213131415161717141213131416161615
Percentage of AmortizationOfIntangibleAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AmortizationOfMortgageServicingRightsMSRs



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-03-31
Value18181917161312121114131413131312121312121216161717181615151415141415131313131414141515
Percentage of AmortizationOfMortgageServicingRightsMSRs100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-09-30
Value0000000000222112113344991011101010101115
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AssetImpairmentCharges



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-03-31
Value2-46150117223423566-1831121301111131762316106163017321623273934
Percentage of AssetImpairmentCharges100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument

us-gaap:AssumptionForFairValueOfInterestsContinuedToBeHeldByTransferorServicingAssetsOrLiabilitiesPrepaymentSpeed

us-gaap:FairValueInputsLevel3, us-gaap:ResidentialMortgage



Period End2020-03-31
Value0.1865
Percentage of AssumptionForFairValueOfInterestsContinuedToBeHeldByTransferorServicingAssetsOrLiabilitiesPrepaymentSpeed100.0

us-gaap:BrokerageCommissionsRevenue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-03-31
Value1311121212121212131214161715151616151616151517171615161715141416131313141411121213141415
Percentage of BrokerageCommissionsRevenue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-138-3825474-338293-5776-128522258-33
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:CommonStockDividendsPerShareCashPaid

us-gaap:RetainedEarnings



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value1.11.09999999999999961.01.01.01.01.00.80.750.750.750.750.750.69999999999999970.70000000000000020.70.70.69999999999999970.70000000000000020.70.70.69999999999999970.70000000000000020.70.70.69999999999999970.70000000000000020.70.7
Percentage of CommonStockDividendsPerShareCashPaid100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtAndEquitySecuritiesGainLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value-20-638114-32-92100
Percentage of DebtAndEquitySecuritiesGainLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0

us-gaap:DeferredIncomeTaxExpenseBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-03-31
Value-3640021389500-124390-7-193664144450376-9-73759-7-142466211192396-3151932-2911172-12-100-11
Percentage of DeferredIncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAmortizationOfGainsLosses

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value300000.0312000.0312000.0323000.0300000.0207000.0206000.0213000.0200000.0247000.0247000.0469000.025000.0-15000.0-15000.0-30000.0
Percentage of DefinedBenefitPlanAmortizationOfGainsLosses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value-13-5-5-6-4-10-10-10-11-7-7-7-6-7-7-6
Percentage of DefinedBenefitPlanAmortizationOfGainsLosses-4650.0-1762.2-1762.2-2026.6-1483.3-5289.4-5314.6-5068.5-5550.0-2961.9-2961.9-1669.7-27200.050240.050240.022576.7

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAmortizationOfPriorServiceCostCredit

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value-1-1-1-1-1-1-1-1-10000000
Percentage of DefinedBenefitPlanAmortizationOfPriorServiceCostCredit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value125000.0139000.0139000.0154000.0125000.0140000.0139000.0153000.0125000.0139000.0139000.0154000.0125000.0-807000.0-807000.0-789000.0
Percentage of DefinedBenefitPlanAmortizationOfPriorServiceCostCredit-10.6-11.7-11.8-12.9-10.6-11.8-11.8-12.9-10.6-40.9-40.9-46.8-35.7237.4238.1239.1

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value31303030303030303027272727272726
Percentage of DefinedBenefitPlanExpectedReturnOnPlanAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanInterestCost

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value0000000000001111
Percentage of DefinedBenefitPlanInterestCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value17202020201818181819191919202020
Percentage of DefinedBenefitPlanInterestCost4268.73480.43480.23618.63349.93253.53259.33149.13376.12133.32133.32563.41823.21677.61679.01625.4

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value0000000000001111
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value5001-144345564666
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost-624.225.825.8-192.9258.6-700.3-700.2-680.4-719.3816.0817.33326.9397.4510.8510.5493.6

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanServiceCost

us-gaap:OtherPostretirementBenefitPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value223000.0215000.0215000.0229000.0200000.0235000.0234000.0243000.0226000.0294000.0293000.0202000.0383000.0398000.0399000.0340000.0
Percentage of DefinedBenefitPlanServiceCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-30
Value4444455555554666
Percentage of DefinedBenefitPlanServiceCost2113.92011.22011.21990.82043.52165.12173.52086.02258.01717.01722.92568.81281.51572.61568.71805.0

us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation, us-gaap:TradingActivityByType

us-gaap:DerivativeGainLossOnDerivativeNet

us-gaap:InterestRateSwap, us-gaap:FairValueHedging, us-gaap:DesignatedAsHedgingInstrument, mtb:FixedRateLongTermBorrowings



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value88-1822563458-12-13
Percentage of DerivativeGainLossOnDerivativeNet100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeInstrumentRisk

us-gaap:DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet

us-gaap:InterestRateSwap



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value3621-1-11-13-13-8-517774791010111111111111121111111010
Percentage of DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DividendsCommonStockCash



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-03-31
Value1431451321351381391431151111121131141151091081111119393939393929292919191909089898988888884-84-418251-83-83-78
Percentage of DividendsCommonStockCash100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-03-31
Value1431451321351381391431151111121131141151091081111119393939393929292919191909089898988888884-84-418251-83-83-78
Percentage of DividendsCommonStockCash100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DividendsPreferredStockCash



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-03-31
Value1717191818181818181818181820202020202020202020201413131313131313131414910-10-5030-10-10-4
Percentage of DividendsPreferredStockCash100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-03-31
Value1717191818181818181818181820202020202020202020201413131313131313131414910-10-5030-10-10-4
Percentage of DividendsPreferredStockCash100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByAssetClass, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1

mtb:OtherAssetsAndOtherLiabilities, us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-30
Value-44-14-62-36-16-20-10-20-8-12-22-19-2345-35-2321
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByAssetClass, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPeriodIncreaseDecrease

mtb:OtherAssetsAndOtherLiabilities, us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-09-302016-03-312015-09-30
Value32-131917834108-5121015271415
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPeriodIncreaseDecrease100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByAssetClass, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3

mtb:OtherAssetsAndOtherLiabilities, us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-31
Value1927552616161618717212315373016
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FederalDepositInsuranceCorporationPremiumExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-03-31
Value12129999181920232325282828222519111010111315151714171923232428272626191818212119215
Percentage of FederalDepositInsuranceCorporationPremiumExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableAllowanceForCreditLossesRecovery



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value1821232422263622162622161917172216281211111415121522161912118121114912
Percentage of FinancingReceivableAllowanceForCreditLossesRecovery100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivablePortfolioSegment

mtb:CommercialFinancialLeasing



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value3366797648434761051753347
Percentage of FinancingReceivableAllowanceForCreditLossesRecovery17.616.428.326.133.935.519.629.129.733.920.020.822.342.538.947.031.959.941.131.734.932.752.1

us-gaap:CommercialRealEstatePortfolioSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value001004141045010122521041
Percentage of FinancingReceivableAllowanceForCreditLossesRecovery2.42.37.03.93.617.840.26.51.418.326.62.67.42.09.511.514.620.316.49.05.233.88.4

us-gaap:ConsumerPortfolioSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value13141315121012129999127776445533
Percentage of FinancingReceivableAllowanceForCreditLossesRecovery71.065.858.464.054.640.435.756.259.637.444.360.062.841.940.932.842.016.633.948.651.221.922.9

us-gaap:ResidentialPortfolioSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value13111111122212111011012
Percentage of FinancingReceivableAllowanceForCreditLossesRecovery9.015.56.36.18.06.34.68.29.310.49.216.67.513.510.78.711.53.38.710.78.811.716.6

us-gaap:FinancingReceivableAllowanceForCreditLossesWriteOffs



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value6762606945645257565347616266594658645332474643414763647648565064608866718399101
Percentage of FinancingReceivableAllowanceForCreditLossesWriteOffs100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivablePortfolioSegment

mtb:CommercialFinancialLeasing



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value16171516819111414139251624217613267121415
Percentage of FinancingReceivableAllowanceForCreditLossesWriteOffs24.227.726.023.918.829.522.625.925.725.620.640.926.136.935.616.010.521.650.623.426.030.336.9

us-gaap:CommercialRealEstatePortfolioSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value111100414100151101423661
Percentage of FinancingReceivableAllowanceForCreditLossesWriteOffs1.91.81.814.60.66.83.77.92.40.70.53.08.71.92.61.62.26.44.110.514.113.13.9

us-gaap:ConsumerPortfolioSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value4441403932373434363432283433293344432018252121
Percentage of FinancingReceivableAllowanceForCreditLossesWriteOffs66.465.267.656.773.058.067.259.264.265.469.946.555.150.250.471.675.566.739.156.053.447.449.5

us-gaap:ResidentialPortfolioSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value53233333444567656333344
Percentage of FinancingReceivableAllowanceForCreditLossesWriteOffs7.55.34.54.77.55.76.46.97.78.38.99.610.011.011.410.911.95.36.110.06.69.19.7

us-gaap:FinancingReceivableModificationsNumberOfContracts2



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value96.090.097.093.0132.0119.0151.0137.0150.0148.0147.0191.0168.0170.0134.0216.0219.0204.0245.0218.0150.0170.0154.0193.0243.0275.0310.0341.0332.0
Percentage of FinancingReceivableModificationsNumberOfContracts2100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableModificationsPostModificationRecordedInvestment2



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value663916234618305872322989394383104366023951832857322419130798253
Percentage of FinancingReceivableModificationsPostModificationRecordedInvestment2100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableModificationsPreModificationRecordedInvestment2



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value6656162346182958703629105444493106346423962035957322418135798555
Percentage of FinancingReceivableModificationsPreModificationRecordedInvestment2100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:GainLossOnDerivativeInstrumentsHeldForTradingPurposesNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value1789104130015023468211610200-52110300004004000-20
Percentage of GainLossOnDerivativeInstrumentsHeldForTradingPurposesNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeInstrumentRisk

mtb:ForeignExchangeAndOtherOptionAndFuturesContracts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value412213022211121217200000-500-1000-20-31000-1
Percentage of GainLossOnDerivativeInstrumentsHeldForTradingPurposesNet25.420.528.822.637.326.4-138.2-736.8256.440.4144.365.448.547.726.629.855.464.937.2-67.0-33.9-5.9120.3-131.494.3-30.5-45.0-122.1-64.9-28.98.7685.9-165.5349.642.1-288.0750.76.2213.1

us-gaap:InterestRateContract



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-30
Value12768210-1-2-1300124504410201032204021221040
Percentage of GainLossOnDerivativeInstrumentsHeldForTradingPurposesNet74.679.571.277.462.773.6238.2836.8-156.459.6-44.334.651.552.373.470.244.635.162.8167.0133.9105.9-20.3231.45.7130.5145.0222.1164.9128.991.3-585.9265.5-249.657.9388.0-650.793.8-113.1

us-gaap:GainsLossesOnSalesOfAssets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-03-31
Value3-45355584425691116365551347131103655621112321364474-2100
Percentage of GainsLossesOnSalesOfAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName, us-gaap:IncomeStatementLocation

us-gaap:IncomeLossFromEquityMethodInvestments

mtb:BayviewLendingGroup, mtb:OtherRevenuesFromOperations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-03-31
Value230003700023-2
Percentage of IncomeLossFromEquityMethodInvestments100.00.00.00.0100.00.00.00.0100.0100.0

us-gaap:IncreaseDecreaseInDeposits



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-03-31
Value5413-343343312113131016-131-1673-1484-1099-26-35001550-2640349044022641140315-946-4-758451311301581909550573-5191606146116391522-82259-1787456611135-1193596-103
Percentage of IncreaseDecreaseInDeposits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInFairValueOfInterestRateFairValueHedgingInstruments1



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value24011-1632000-4
Percentage of IncreaseDecreaseInFairValueOfInterestRateFairValueHedgingInstruments1100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:FinancialInstrument

us-gaap:CashFlowHedging, mtb:InterestPaymentsOnVariableRateCommercialRealEstateLoans



Period End2020-03-312019-12-312019-09-30
Value330
Percentage of IncreaseDecreaseInFairValueOfInterestRateFairValueHedgingInstruments1132.188.2138.1

us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:TradingActivityByType

us-gaap:FairValueHedging, mtb:FixedRateLongTermBorrowings



Period End2020-03-312019-12-312019-09-30
Value-959000.0519000.0138000.0
Percentage of IncreaseDecreaseInFairValueOfInterestRateFairValueHedgingInstruments1-32.111.8-38.1

us-gaap:IncreaseDecreaseInFinancialInstrumentsUsedInOperatingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-31
Value708-141126228170191-50-37-91-65321-113-4642-185953-1818-10412-271697-2212-12-4-7-201020-8078432-27
Percentage of IncreaseDecreaseInFinancialInstrumentsUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInLoansHeldForSale



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-03-31
Value158-150-198421-202-102-50368372-18721167-712379971880-90-310275-19712631314-122-134587426-205396494188-15478-148205-373-134160-479252-48-263
Percentage of IncreaseDecreaseInLoansHeldForSale100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value00000000000000000000000000100000
Percentage of IncrementalCommonSharesAttributableToShareBasedPaymentArrangements100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InformationTechnologyAndDataProcessing



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value6461605552505049485045444443424243
Percentage of InformationTechnologyAndDataProcessing100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestAndDividendIncomeOperating



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-03-31
Value1120118512291237122612201167112810821074105710301006982969970972902770760738756743734722734742750729745744737714716720688667682685684676692700654
Percentage of InterestAndDividendIncomeOperating100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestAndFeeIncomeLoansAndLeases



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-03-31
Value10461079111911251117109910601024979966953924898882871867863796672662647659647645645663683705682693687674648648655624594605603596588598599554
Percentage of InterestAndFeeIncomeLoansAndLeases100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestExpenseForeignDeposits



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-03-31
Value34664310000000000000000000000000000000000000
Percentage of InterestExpenseForeignDeposits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestExpenseShortTermBorrowings



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-03-31
Value03676111000000012100000000000000000000000112
Percentage of InterestExpenseShortTermBorrowings100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestExpenseTimeDeposits



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-03-31
Value2123252421161211101213161823272624153333333467891012131417191921232629395060
Percentage of InterestExpenseTimeDeposits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestIncomeDomesticDeposits



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-03-31
Value1837403627412621182114121211121010433353211110000011000000000
Percentage of InterestIncomeDomesticDeposits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestIncomeExpenseAfterProvisionForLoanLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-03-31
Value726954984986102810201013973932940927886859813811831822749648653621648640639624624625620618618616587571544558523493489476482451413393289
Percentage of InterestIncomeExpenseAfterProvisionForLoanLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestIncomeExpenseNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-03-31
Value9761008102910411050105810291008975971957938914875858863871807692683659681669669656666673677656667662647620618616586568574569567556558547447
Percentage of InterestIncomeExpenseNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestIncomeSecuritiesTaxExempt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-03-31
Value00000000000000000001111111111122222222222221
Percentage of InterestIncomeSecuritiesTaxExempt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestIncomeSecuritiesTaxable



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-03-31
Value5063697580788082828587929587849198999393859091857367554144495459626360607073808585919798
Percentage of InterestIncomeSecuritiesTaxable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestPaidNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value15815821616919113516210011894111
Percentage of InterestPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LaborAndRelatedExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-03-31
Value536469476455499438431418463402399398449393399398431434363361389345348339371336339323356323321323346312325300266243246245264247255249
Percentage of LaborAndRelatedExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LitigationSettlementAmountAwardedToOtherParty



Period End2020-03-31
Value88
Percentage of LitigationSettlementAmountAwardedToOtherParty100.0

us-gaap:EmployeeStockOwnershipPlanESOPDisclosuresByPlan

mtb:ESOP



Period End2020-03-31
Value80
Percentage of LitigationSettlementAmountAwardedToOtherParty90.9

us-gaap:MarketingAndAdvertisingExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value2227222420252121161917161621212221
Percentage of MarketingAndAdvertisingExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfAdoptionQuantification



Period End2020-03-31
Value132
Percentage of NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfAdoptionQuantification100.0

us-gaap:AdjustmentsForNewAccountingPronouncements

us-gaap:AccountingStandardsUpdate201613



Period End2020-03-31
Value-91
Percentage of NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfAdoptionQuantification-69.4

us-gaap:AdjustmentsForNewAccountingPronouncements, us-gaap:StatementEquityComponents

us-gaap:AccountingStandardsUpdate201613, us-gaap:RetainedEarnings



Period End2020-03-31
Value-91
Percentage of NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfAdoptionQuantification-69.4

us-gaap:FinancingReceivablePortfolioSegment

mtb:CommercialFinancialLeasing



Period End2020-03-31
Value-61
Percentage of NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfAdoptionQuantification-46.4

us-gaap:CommercialRealEstatePortfolioSegment



Period End2020-03-31
Value23
Percentage of NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfAdoptionQuantification17.9

us-gaap:ConsumerPortfolioSegment



Period End2020-03-31
Value194
Percentage of NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfAdoptionQuantification146.5

us-gaap:ResidentialPortfolioSegment



Period End2020-03-31
Value53
Percentage of NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfAdoptionQuantification40.7

us-gaap:UnallocatedFinancingReceivables



Period End2020-03-31
Value-77
Percentage of NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfAdoptionQuantification-58.6

us-gaap:NoninterestExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-03-31
Value906823877873894802775776933795806750787769752749776786653696686680679681702743658598635626616627639739662576499469480476489478500438
Percentage of NoninterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NoninterestIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-03-31
Value529521527512500480459457458484459460446465491448420448439497440451451456420446477508432453445391376398368501314286289273257265278232
Percentage of NoninterestIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NoninterestIncomeOtherOperatingIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-03-31
Value1331181031121341101131001261051061171101151031041011181131509510398102961041531009610196898614893163911197779798210659
Percentage of NoninterestIncomeOtherOperatingIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OccupancyNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value79828279797377737471757374697575747068666662676871686664656264656565685956505455555358
Percentage of OccupancyNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossBeforeReclassificationAndTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value-34-200-10-310110-10-20002-3-1-200010-10000
Percentage of OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossBeforeReclassificationAndTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

mtb:AccumulatedOther



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value-34-200-10-310110-10-20002-3-1-200
Percentage of OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossBeforeReclassificationAndTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value-1-1-1-1-1-1-1-1-10000-1-1-1-1-1-1-1-1-1-1-1-213-1-1-211
Percentage of OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value-1-1-1-1-1-1-1-1-10000-1-1-1-1-1-1-1-1-1-1-1-213-1-1-211
Percentage of OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value00000000000000000-1-1-10-1-1-1-1-1-1-1-10
Percentage of OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value000000100000000000000000000000
Percentage of OtherComprehensiveIncomeLossAmortizationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetPriorServiceCostCreditTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value97722698481-30-36-100-531816-1-191-174797-8048-722518-276438-2923-6102424920034-33
Percentage of OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value584-15643227168148-47-51-158-692928-2-302-174159-15778-11737-320-4810561
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InvestmentType

us-gaap:SecuritiesInvestment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value13192993113108-42-42-145
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax22.5-6.267.841.467.572.987.981.991.7

us-gaap:StatementEquityComponents

mtb:AccumulatedOther



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value453-40141335420-5-9-13-10010-10-20002-2-1-100
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsBeforeTax77.525.632.258.632.513.812.118.18.315.22.34.7-32.10.432.8-3.2-0.10.40.1-2.5-6.00.53.7-0.4-0.4

us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value430-11532167124109-35-44-110-411817-1-18304596-9647-7123-194-29633712824-272-24
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value-15441-11-59-44-39123-7-47-2811110-11902962-6030-4514-125
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossBeforeTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value565-17144237179166-33-38-147-8436355-296-2281167-14688-10647-318-451076422048-223-16788741
Percentage of OtherComprehensiveIncomeLossBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InvestmentType

us-gaap:SecuritiesInvestment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value132103094114110-41-41-144
Percentage of OtherComprehensiveIncomeLossBeforeTax23.4-6.269.039.964.166.4124.3107.798.2

us-gaap:StatementEquityComponents

mtb:AccumulatedOther



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value421-5991376126-1-6-12-12000-10-20002-2-1-100
Percentage of OtherComprehensiveIncomeLossBeforeTax74.434.921.757.934.215.84.916.98.514.5-1.40.613.80.41.7-3.0-0.10.40.0-2.7-4.80.53.9-0.4-0.4

us-gaap:AccumulatedDefinedBenefitPlansAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value12-122453299991667620657-14999-346111268888-21777
Percentage of OtherComprehensiveIncomeLossBeforeTax2.271.39.32.21.717.8-29.3-24.6-6.7-19.018.820.4130.6-6.9-28.87.04.310.110.6-8.919.5108.8-3.61.82.1122.017.2-280.836.0129.89.98.819.0

us-gaap:OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value312-47810244200-2-10-7-10000000000000
Percentage of OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value00000000000000000001-100000000000000
Percentage of OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value416-12632175132122-24-34-102-5122213-180-1349101-8854-6528-193-276538355324346288286341286231-16219291
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InvestmentType

us-gaap:SecuritiesInvestment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value97722698481-30-36-100
Percentage of OtherComprehensiveIncomeLossNetOfTax23.4-6.269.239.964.066.4124.2105.998.2

us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value9-9033221777944312334
Percentage of OtherComprehensiveIncomeLossNetOfTax2.271.49.42.21.717.8-29.2-20.3-7.1-18.918.820.3129.4-6.9-28.47.14.3

us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges



Period End2020-03-31
Value309
Percentage of OtherComprehensiveIncomeLossNetOfTax74.4

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-30
Value416-12632175132122-24-34-102-5122213-18013329-114-10475325-16336
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.037.79.2-0.55.0-3.614.018.610.91013.816.5

us-gaap:OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-30
Value-990-3-3-2-21-7-7-7-9-4-4-3-12-3-3-47-5-5-4210-1-10-163-5-5-513-4-4-4163-2-2
Percentage of OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value34000.043000.037000.028000.028000.028000.027000.028000.028000.028000.031000.039000.039000.039000.039000.038000.039000.039000.039000.039000.024000.0
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

mtb:AccumulatedOther



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value34000.043000.037000.028000.028000.028000.027000.028000.028000.028000.031000.039000.039000.039000.039000.038000.039000.039000.039000.039000.024000.0
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value25000.032000.026000.021000.021000.021000.020000.020000.021000.017000.019000.024000.023000.024000.023000.023000.024000.023000.024000.024000.014000.0-102000.0-613000.0
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value-9000.0-11000.0-11000.0-7000.0-7000.0-7000.0-37000.08000.07000.011000.012000.015000.016000.015000.016000.015000.015000.016000.015000.015000.010000.0
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value-13-5-5-6-4-10-10-10-10-7-7-7-6-7-7-6-8-11-11-11-11-3-3-3-3-10-10-10-10-9
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedDefinedBenefitPlansAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value-13-5-5-6-4-10-10-10-10-7-7-7-6-7-7-6-8-11-11-11-11-3-3-3-3-10-10-10-10-9
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIPensionAndOtherPostretirementBenefitPlansForNetGainLossBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-31
Value-14945-11-62-47-438444-2714131-116-83265-5834-4119-124-1742258619-19-6303416
Percentage of OtherComprehensiveIncomeLossTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value456-44161335421-5-6-14-110000101
Percentage of OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0100.0100.0100.0

us-gaap:StatementEquityComponents

mtb:AccumulatedOther



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value456-44161335421-5-6-14-110000101
Percentage of OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302015-12-312015-09-302014-12-312014-09-302014-06-30
Value336-3212984015-4-4-10-6000000
Percentage of OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302015-12-312015-09-302014-12-312014-09-30
Value-11911-4-35-14-512-93-500000
Percentage of OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302009-12-31
Value13192993113108-42-42-145-682926-3-315077159-13278-1204028-4610562-4937-455-15606329-269-60-7-33-55-13
Percentage of OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InvestmentType

us-gaap:SecuritiesInvestment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value13192993113108-42-42-145
Percentage of OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-03-31
Value96721698379-31-37-101-401716-1-19104696-8047-732417-286437-3022-273-9363818-142-36-4-20-33557997110
Percentage of OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302009-12-31
Value-34-2-7-24-29-28109-5-44-281110-1-12403062-5130-461511-184124-1914-172-62348-110-2723313215
Percentage of OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherInterestAndDividendIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-312013-09-302013-06-30
Value460000000000000000000000000
Percentage of OtherInterestAndDividendIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherNoninterestExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-03-31
Value1761562102332181891601782942122271741560230231220240197242202244233239223301217170170192183186170305214165136134140129123131140110
Percentage of OtherNoninterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsForProceedsFromLoansAndLeases



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-03-31
Value310513112248464121919-584-555-303327-1124-337-79793110904904391187437996661000853346220782-1134632-404210076617631042171167-1255791289-330-210-546-143-84
Percentage of PaymentsForProceedsFromLoansAndLeases100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsForProceedsFromOtherInvestingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-03-31
Value-42025128-78-5-582-324146-18-35-11-266-109106-7-8691-382119-214-21-275233-68143347132552113-151-35-546-38-114412
Percentage of PaymentsForProceedsFromOtherInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsForProceedsFromProductiveAssets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-03-31
Value5158365130382227916122821422820163919139221221164342261625192719312458311512103110
Percentage of PaymentsForProceedsFromProductiveAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsOfDividendsCommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-03-31
Value1431451321341391391431151121121141141161081091111129393939393929292919191909088908988888884848483838377
Percentage of PaymentsOfDividendsCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsOfDividendsPreferredStockAndPreferenceStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-03-31
Value211218181718171817181719172317231723172317231723621421421421423491010101010104
Percentage of PaymentsOfDividendsPreferredStockAndPreferenceStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireAvailableForSaleSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-03-31
Value2187113350242395241263220631129330711411871361700189917091561241426910922959125535325133673458221
Percentage of PaymentsToAcquireAvailableForSaleSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireHeldToMaturitySecurities



Period End2020-03-312019-12-312019-03-312018-12-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-03-31
Value5049502500636539198555659764733901575562122636965710518969128
Percentage of PaymentsToAcquireHeldToMaturitySecurities100.00.0100.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PensionAndOtherPostretirementBenefitExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value27-29211922-26161721-23161719-22141517-21141316-19131215-19121215-20111114-3050810455989010176-159877511690-168
Percentage of PensionAndOtherPostretirementBenefitExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PreferredStockDividendsIncomeStatementImpact



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value1717161818181818181818181820202020202020202020201414131313
Percentage of PreferredStockDividendsIncomeStatementImpact100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementClassOfStock

us-gaap:PreferredStockDividendsPerShareCashPaid

us-gaap:SeriesGPreferredStock



Period End2020-03-31
Value125.694
Percentage of PreferredStockDividendsPerShareCashPaid100.0

us-gaap:ProceedsFromInterestReceived



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value1159119212551250119412081150113210771067105010361001980976978968899755752726745726725695710724740718744729
Percentage of ProceedsFromInterestReceived100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-03-31
Value30368942511343715824656003494804984546976186235555111048483490369312310209166147235298353429414324417299256342408442367360369383496
Percentage of ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-03-31
Value35937557411399103127123123138145123121149167159132143168202148131126118927175627991807582926548661086247294928
Percentage of ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromPaymentsForInInterestBearingDepositsInBanks



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-31
Value-17065305-3703-1188502-1581146-534-10561227-12821921-19445776-23021070-19504687-66722451791205-4643266-1648274629-1250-1174282657212-11272071484301300-283312-101
Percentage of ProceedsFromPaymentsForInInterestBearingDepositsInBanks100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-03-31
Value-10-4-30-17-5-10245-362158102292461-465273024187893148-2231588024-494511352161566
Percentage of ProceedsFromPaymentsForOtherFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProvisionForLoanAndLeaseLosses



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-30
Value250544555223816354331305255624732495844303833293032424857384946604974586375859385105145154
Percentage of ProvisionForLoanAndLeaseLosses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivablePortfolioSegment

mtb:CommercialFinancialLeasing



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value66282410622-6117-3213281926-1024102191102
Percentage of ProvisionForLoanAndLeaseLosses26.652.954.518.828.559.1-43.632.116.8-10.18.225.752.432.055.8-34.149.717.948.932.53.833.08.2

us-gaap:CommercialRealEstatePortfolioSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value88-4-1614-4-13-11-10-55-77139154111-315-98
Percentage of ProvisionForLoanAndLeaseLosses35.5-8.0-37.126.4-19.1-36.1-71.2-31.0-12.217.8-25.714.72.36.221.249.48.220.74.3-12.240.9-29.427.7

us-gaap:ConsumerPortfolioSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value8533373122333230292633241831162219142421193521
Percentage of ProvisionForLoanAndLeaseLosses34.262.683.957.4104.088.3205.588.069.385.5113.046.534.250.035.270.940.624.955.670.151.5106.375.2

us-gaap:ResidentialPortfolioSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value9-30-2-2-4051021757-64119-310-3-3
Percentage of ProvisionForLoanAndLeaseLosses3.7-6.4-0.7-4.3-11.1-10.74.615.024.46.54.213.810.212.1-13.313.82.534.0-7.25.42.5-9.3-11.0

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability



Period End2020-03-312019-12-312019-09-302019-06-302019-03-31
Value1762242420
Percentage of RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability100.0100.0100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument

us-gaap:ServicingAssetAtAmortizedValueValuationAllowance

us-gaap:FairValueInputsLevel3, us-gaap:ResidentialMortgage



Period End2020-03-312019-03-31
Value170
Percentage of ServicingAssetAtAmortizedValueValuationAllowance100.00.0

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument

us-gaap:ServicingAssetAtFairValuePeriodIncreaseDecrease

us-gaap:FairValueInputsLevel3, us-gaap:ResidentialMortgage



Period End2020-03-312019-03-31
Value100
Percentage of ServicingAssetAtFairValuePeriodIncreaseDecrease100.00.0

us-gaap:SuppliesAndPostageExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-03-31
Value109101098889888988911108998991089101010811111110998789989
Percentage of SuppliesAndPostageExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:TradingGainsLosses



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-03-31
Value211616181016654107897121379866868613898108610746812634671
Percentage of TradingGainsLosses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:TransferToOtherRealEstate



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value172426142421142115323133232333323332111210816988207812
Percentage of TransferToOtherRealEstate100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:TreasuryStockValueAcquiredCostMethod



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value37328229940136549949847572022422422453237350154100
Percentage of TreasuryStockValueAcquiredCostMethod100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:TreasuryStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value37328229940136549949847572022422422453237350154100
Percentage of TreasuryStockValueAcquiredCostMethod100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mtb:AccumulatedOtherComprehensiveIncomeLossIncomeTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312010-12-31
Value7673-27-39-102-149-192-184-180129160174-188-190-73-65-97-162-104-139-97-116825-16-41-128-147-146-155-148-179-214-230-132
Percentage of AccumulatedOtherComprehensiveIncomeLossIncomeTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mtb:AverageAsset



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value1205851195841185841176671168391169591166761170211176841208601210731218651229781243401238971234791232521017809734596750958929214389952882788666583662831008263781913
Percentage of AverageAsset100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementBusinessSegments

mtb:BusinessBanking



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value60065793575857245702563156375656568156025596559555965456544254405424533953215313530052815287528652425080504150104980
Percentage of AverageAsset5.04.84.94.94.94.84.84.84.84.64.64.64.64.44.44.44.45.25.55.55.55.75.96.06.06.16.16.16.1

mtb:CommercialBanking



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value2917228142280892798127858266262652426542264822657326699268022672325592253632519524838241432404123997236832289222805227422252321655215542144621272
Percentage of AverageAsset24.223.523.723.823.822.822.722.722.522.022.122.021.720.620.520.420.223.724.724.824.724.825.425.826.025.925.926.026.0

mtb:CommercialRealEstateSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value2484923921238932372023572228852289922848228112274122800228752297721131205712011619839188271863218191180191711316941168781693717150171121712217054
Percentage of AverageAsset20.620.020.120.220.219.619.619.519.418.818.818.818.717.016.616.316.118.519.118.818.818.618.819.119.520.520.620.720.8

mtb:DiscretionaryPortfolio



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value2714329081293552988830341321233265933277340953720337807383413873140867412534190042509266482315323029227142079820306194171858116480162241627816585
Percentage of AverageAsset22.524.324.825.426.027.528.028.429.030.831.231.531.532.933.333.934.526.223.823.823.722.622.622.021.419.719.519.720.2

mtb:ResidentialMortgageBanking



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value32182611244421732071216121232186227823552335234124262569257825872647291830073413351233333262322631572858278327522847
Percentage of AverageAsset2.72.22.11.81.81.81.81.91.91.91.91.92.02.12.12.12.12.93.13.53.73.63.63.73.63.43.33.33.5

mtb:RetailBanking



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value1600215083148391458014403136561352213403133771270212519123371220411840117391164011568110351091210830107881044910348102291015510997113041135711391
Percentage of AverageAsset13.312.612.512.412.311.711.611.511.410.510.310.19.99.59.59.49.410.811.211.211.311.311.511.611.713.113.613.713.9

us-gaap:AllOtherSegments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-312013-09-302013-06-30
Value141951495314206136011289213877133121310912960136841331713574143211688516951166011642712870122791197711876122771100310500944290828672
Percentage of AverageAsset11.812.512.011.611.011.911.411.211.011.311.011.111.613.613.713.413.312.612.612.412.413.312.211.911.310.910.5

mtb:CommitmentsRegardingCommercialLettersOfCredit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302009-12-31
Value34413843595542555646423046445046455544424246524339534936435346565444416558767266
Percentage of CommitmentsRegardingCommercialLettersOfCredit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mtb:CommitmentsRegardingFinancialGuaranteesAndIndemnificationContracts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302009-12-31
Value4072410839963741370335293416345834493434338533063477304331472926277327942922279525352490251827012842245723942600223021201994189522451903204517901707160915211633
Percentage of CommitmentsRegardingFinancialGuaranteesAndIndemnificationContracts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mtb:CommitmentsToExtendCreditForCommercialAndOther



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302009-12-31
Value152201617016313151881490014363146081324712951127331267712310121341229812219118981207711802121441143911493110801103710560107811041910629100799782100701031510004109361044210967107878816833277317155
Percentage of CommitmentsToExtendCreditForCommercialAndOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mtb:CommitmentsToExtendCreditForCommercialRealEstateLoansToBeSold



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302009-12-31
Value29116439324719922915332328819417019129870403112184578910434621214125015162602471051392821341901775518142272157180
Percentage of CommitmentsToExtendCreditForCommercialRealEstateLoansToBeSold100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mtb:CommitmentsToExtendCreditForHomeEquityLinesOfCredit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302009-12-31
Value5480544254515489552954845465547455185482549254985535549955255569560456315535561262196194621362466260621862396276630262826319636963996393642865346274628163466482
Percentage of CommitmentsToExtendCreditForHomeEquityLinesOfCredit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mtb:CommitmentsToExtendCreditForOtherCommercialRealEstate



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value9021902982227771733175566549585557886050574959876166645163656325572759495161
Percentage of CommitmentsToExtendCreditForOtherCommercialRealEstate100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mtb:CommitmentsToExtendCreditForOtherResidentialRealEstate



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302009-12-31
Value810448511414277219267240223201202293240232297286281212674719581524473412368384410440453445475438243129199113112151217127
Percentage of CommitmentsToExtendCreditForOtherResidentialRealEstate100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mtb:CommitmentsToExtendCreditForResidentialRealEstateLoansToBeSold



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302009-12-31
Value711423530473314245307361343347482524473478635638520488587671661432557596521469647895126615501645771295182227482438161930631
Percentage of CommitmentsToExtendCreditForResidentialRealEstateLoansToBeSold100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mtb:CommitmentsToExtendCreditToCommercialCustomers



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value8900910089008600870086008100
Percentage of CommitmentsToExtendCreditToCommercialCustomers100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis

mtb:CommitmentsToOriginateRealEstateLoansForSale

us-gaap:FairValueInputsLevel3, us-gaap:EstimateOfFairValueFairValueDisclosure



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value351024177
Percentage of CommitmentsToOriginateRealEstateLoansForSale100.0100.0100.0100.0100.0

us-gaap:FairValueByMeasurementBasis

us-gaap:CarryingReportedAmountFairValueDisclosure



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value351024177741088131216729211691711261716221231347
Percentage of CommitmentsToOriginateRealEstateLoansForSale100.0100.0100.0100.00.0100.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:EstimateOfFairValueFairValueDisclosure



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value351024177741088131216729211691711261716221231347
Percentage of CommitmentsToOriginateRealEstateLoansForSale100.0100.0100.0100.00.0100.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis

mtb:CommitmentsToSellRealEstateLoansNet

us-gaap:FairValueInputsLevel2, us-gaap:EstimateOfFairValueFairValueDisclosure



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value-320-11-23-6
Percentage of CommitmentsToSellRealEstateLoansNet100.0100.0100.0100.0100.0

us-gaap:FairValueByMeasurementBasis

us-gaap:CarryingReportedAmountFairValueDisclosure



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value-320-11-23-1-61002123136-111540
Percentage of CommitmentsToSellRealEstateLoansNet100.0100.0100.0100.00.0100.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:EstimateOfFairValueFairValueDisclosure



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value-320-11-23-1-61002123136-111540
Percentage of CommitmentsToSellRealEstateLoansNet100.0100.0100.0100.00.0100.00.00.00.00.00.00.00.00.00.00.00.00.0

mtb:CommitmentsToSellRealEstateLoansNotionalAmount



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302009-12-31
Value13239061350137774694099417259778121052109110131489153811559587829771354132212371127125484585412943016213626252337106860263544590388973413751239
Percentage of CommitmentsToSellRealEstateLoansNotionalAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mtb:CommonStockIssuable



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-312009-12-312008-12-31
Value111111111111122222222222222223333444344444
Percentage of CommonStockIssuable100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mtb:CommonStockIssuableShare



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value17641.021534.021461.021327.021324.024563.024595.024447.024371.027138.027019.028835.028740.032403.033748.033546.033391.036644.036462.041330.0
Percentage of CommonStockIssuableShare100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mtb:DerivativeHedgedLoans



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value2718242516181826171627262428382822182329312828312323
Percentage of DerivativeHedgedLoans100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mtb:EquityAndOtherSecuritiesAtCost



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value502487619558468677488507526415
Percentage of EquityAndOtherSecuritiesAtCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mtb:EquityAndOtherSecuritiesEstimatedFairValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value515521660595496693500523539415
Percentage of EquityAndOtherSecuritiesEstimatedFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mtb:EquitySecuritiesGrossUnrealizedGains



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value133441372817
Percentage of EquitySecuritiesGrossUnrealizedGains100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis

mtb:InterestRateSwapAgreementsUsedForInterestRateRiskManagement

us-gaap:FairValueInputsLevel2, us-gaap:EstimateOfFairValueFairValueDisclosure



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value2-1-6-55
Percentage of InterestRateSwapAgreementsUsedForInterestRateRiskManagement100.0100.0100.0100.0100.0

us-gaap:FairValueByMeasurementBasis

us-gaap:CarryingReportedAmountFairValueDisclosure



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value2-1-6-5-1652000047112133414360637273769194102114143
Percentage of InterestRateSwapAgreementsUsedForInterestRateRiskManagement100.0100.0100.0100.00.0100.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:EstimateOfFairValueFairValueDisclosure



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value2-1-6-5-1652000047112133414360637273769194102114143
Percentage of InterestRateSwapAgreementsUsedForInterestRateRiskManagement100.0100.0100.0100.00.0100.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

mtb:InvestmentInDebtSecuritiesAmortizedCost



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value824889159966109631211312186
Percentage of InvestmentInDebtSecuritiesAmortizedCost100.0100.0100.0100.0100.0100.0

mtb:InvestmentInDebtSecuritiesEstimatedFairValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value8537901710060110101202511937
Percentage of InvestmentInDebtSecuritiesEstimatedFairValue100.0100.0100.0100.0100.0100.0

mtb:InvestmentInDebtSecuritiesGrossUnrealizedGains



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value3291531551195633
Percentage of InvestmentInDebtSecuritiesGrossUnrealizedGains100.0100.0100.0100.0100.0100.0

mtb:InvestmentInDebtSecuritiesGrossUnrealizedLosses



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value40506172144281
Percentage of InvestmentInDebtSecuritiesGrossUnrealizedLosses100.0100.0100.0100.0100.0100.0

mtb:InvestmentSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsAggregateLosses



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value701006132151117234310012813135451204311342458431-320245222918691323
Percentage of InvestmentSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsAggregateLosses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mtb:InvestmentSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value145128260503041085520762946355372750957587824891133393013934749202131261679232173120534934342145912999814099175394425435863213256961
Percentage of InvestmentSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mtb:InvestmentSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerAggregateLosses



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value324959711442742922141991458045525455617268636259698281698178-90-201250275318343363364344359413612
Percentage of InvestmentSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerAggregateLosses100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mtb:InvestmentSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312009-12-31
Value1402256275337777954918661504820509752151951235273255236337167245145948350367897410072842762842799681039110711041001102010791175134013791920
Percentage of InvestmentSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mtb:InvestmentsInVariableInterestEntityCarryingAmount



Period End2020-03-312019-12-312019-09-302018-12-31
Value724748604523
Percentage of InvestmentsInVariableInterestEntityCarryingAmount100.0100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis

mtb:LoansAndLeasesReceivableConsumerInstallmentRevolvingAndHomeEquity

us-gaap:FairValueInputsLevel3, us-gaap:EstimateOfFairValueFairValueDisclosure



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value1510015413151571453713819
Percentage of LoansAndLeasesReceivableConsumerInstallmentRevolvingAndHomeEquity100.0100.0100.0100.0100.0

us-gaap:FairValueByMeasurementBasis

us-gaap:CarryingReportedAmountFairValueDisclosure



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value15571153861517514558140881397013805134531329813266130021258012221121461206611811116321159911375111331097310982108541061010360102911017411559
Percentage of LoansAndLeasesReceivableConsumerInstallmentRevolvingAndHomeEquity103.199.8100.1100.10.0101.10.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:EstimateOfFairValueFairValueDisclosure



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value15100154131515714537140181381913676132571311213161129351248512083120611200911713115531155011280110141088010909107631052410271102011015111504
Percentage of LoansAndLeasesReceivableConsumerInstallmentRevolvingAndHomeEquity100.0100.0100.0100.00.0100.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

mtb:LoansAndLeasesReceivableThirtyToEightyNineDaysPastDue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-31
Value136611741146916942866905102699110781081102589210259429289291135503543474530517596610704725629749730673656675725854580545645
Percentage of LoansAndLeasesReceivableThirtyToEightyNineDaysPastDue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CreditFacility, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

mtb:RevolvingLoansConvertedToTermLoans, mtb:HomeEquityLinesAndLoans



Period End2020-03-31
Value26
Percentage of LoansAndLeasesReceivableThirtyToEightyNineDaysPastDue1.9

mtb:RevolvingLoansConvertedToTermLoans, mtb:OtherLoans



Period End2020-03-31
Value1
Percentage of LoansAndLeasesReceivableThirtyToEightyNineDaysPastDue0.1

us-gaap:RevolvingCreditFacility, mtb:OtherLoans



Period End2020-03-31
Value7
Percentage of LoansAndLeasesReceivableThirtyToEightyNineDaysPastDue0.6

us-gaap:RevolvingCreditFacility, mtb:ResidentialRealEstateExcludingAltA



Period End2020-03-31
Value1
Percentage of LoansAndLeasesReceivableThirtyToEightyNineDaysPastDue0.1

us-gaap:ExtinguishmentOfDebt, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

mtb:LongTermDebtPriorPeriod, mtb:HomeEquityLinesAndLoans



Period End2020-03-31
Value4
Percentage of LoansAndLeasesReceivableThirtyToEightyNineDaysPastDue0.3

mtb:LongTermDebtPriorPeriod, mtb:OtherLoans



Period End2020-03-31
Value1
Percentage of LoansAndLeasesReceivableThirtyToEightyNineDaysPastDue0.1

mtb:LongTermDebtPriorPeriod, mtb:RecreationalFinance



Period End2020-03-31
Value10
Percentage of LoansAndLeasesReceivableThirtyToEightyNineDaysPastDue0.8

mtb:LongTermDebtPriorPeriod, mtb:ResidentialLimitedDocumentation



Period End2020-03-31
Value87
Percentage of LoansAndLeasesReceivableThirtyToEightyNineDaysPastDue6.4

mtb:LongTermDebtPriorPeriod, mtb:ResidentialRealEstateExcludingAltA



Period End2020-03-31
Value419
Percentage of LoansAndLeasesReceivableThirtyToEightyNineDaysPastDue30.7

mtb:LongTermDebtPriorPeriod, us-gaap:AutomobileLoan



Period End2020-03-31
Value7
Percentage of LoansAndLeasesReceivableThirtyToEightyNineDaysPastDue0.6

us-gaap:LongTermDebt, mtb:OtherLoans



Period End2020-03-312019-12-312018-12-312017-12-312016-12-31
Value04000
Percentage of LoansAndLeasesReceivableThirtyToEightyNineDaysPastDue0.00.30.10.00.0

us-gaap:LongTermDebt, mtb:RecreationalFinance



Period End2020-03-312019-12-312018-12-312017-12-312016-12-31
Value07664
Percentage of LoansAndLeasesReceivableThirtyToEightyNineDaysPastDue0.10.60.80.60.4

us-gaap:LongTermDebt, mtb:ResidentialRealEstateExcludingAltA



Period End2020-03-312019-12-312018-12-312017-12-312016-12-31
Value16133816
Percentage of LoansAndLeasesReceivableThirtyToEightyNineDaysPastDue0.10.61.63.61.6

us-gaap:LongTermDebt, us-gaap:AutomobileLoan



Period End2020-03-312019-12-312018-12-312017-12-312016-12-31
Value011161711
Percentage of LoansAndLeasesReceivableThirtyToEightyNineDaysPastDue0.01.01.91.71.1

us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

mtb:CommercialFinancialLeasing



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value21918412526141398129511674849385370633052293643374177
Percentage of LoansAndLeasesReceivableThirtyToEightyNineDaysPastDue16.115.711.02.915.04.69.02.95.215.54.54.84.35.27.56.83.34.75.96.79.17.08.011.0

mtb:CommercialRealEstateExcludingResidentialBuilderAndDeveloperAndOtherConstruction



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value18516518614615913497212250166273256185183116125149172105156116118101145
Percentage of LoansAndLeasesReceivableThirtyToEightyNineDaysPastDue13.614.116.216.016.915.510.820.725.315.425.325.020.817.912.413.516.015.220.928.824.522.419.720.7

mtb:HomeEquityLinesAndLoans



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value303029293125352932383432324440344045383135423640
Percentage of LoansAndLeasesReceivableThirtyToEightyNineDaysPastDue2.22.62.63.33.32.93.92.93.23.63.23.23.74.34.33.74.34.07.75.87.58.17.05.8

mtb:OtherCommercialConstruction



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value191951125531433914071235183237720412865284318171842
Percentage of LoansAndLeasesReceivableThirtyToEightyNineDaysPastDue14.08.19.86.03.35.04.413.77.22.24.78.22.77.62.14.43.05.85.68.03.83.33.66.0

mtb:OtherLoans



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value154514121415413028403326253131262436313128333447
Percentage of LoansAndLeasesReceivableThirtyToEightyNineDaysPastDue1.13.91.31.41.51.84.63.02.93.83.12.62.93.13.32.92.73.26.25.86.06.36.76.8

mtb:RecreationalFinance



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value35362724222923
Percentage of LoansAndLeasesReceivableThirtyToEightyNineDaysPastDue2.63.12.42.72.43.52.2

mtb:ResidentialBuilderAndDeveloper



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value362166220781526111541614157154611218
Percentage of LoansAndLeasesReceivableThirtyToEightyNineDaysPastDue2.71.80.50.70.22.30.80.80.20.52.41.11.70.51.81.61.60.73.20.81.32.24.11.2

mtb:ResidentialLimitedDocumentation



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value876572817172937982838882918810511210713711
Percentage of LoansAndLeasesReceivableThirtyToEightyNineDaysPastDue6.45.66.48.97.68.410.37.78.37.88.28.110.28.611.212.111.612.12.2

mtb:ResidentialRealEstateExcludingAltA



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value499451495462406404437425407474458424431485494470500560206226
Percentage of LoansAndLeasesReceivableThirtyToEightyNineDaysPastDue36.538.443.250.443.146.748.341.541.144.042.441.448.347.452.550.753.849.440.942.7

us-gaap:AutomobileLoan



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value657874706279716964786759485646393356362925302429
Percentage of LoansAndLeasesReceivableThirtyToEightyNineDaysPastDue4.86.76.57.76.79.27.96.86.67.36.25.85.55.54.94.23.64.97.35.55.35.74.84.1

mtb:MaximumCreditRiskForRecourseAssociatedWithLoansSoldUnderFederalNationalMortgageAssociationDelegatedUnderwritingAndServicingProgram



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302009-12-31
Value3800390038003600350034003300330033003300320030003000280027002600260025002500250024002400230023002300230022002100210020001900180019001800180017001600160015001300
Percentage of MaximumCreditRiskForRecourseAssociatedWithLoansSoldUnderFederalNationalMortgageAssociationDelegatedUnderwritingAndServicingProgram100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

mtb:MortgageLoansOfPrivatelyHeldCompany

mtb:BayviewLendingGroupAndBayviewFinancial



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value21002200230024002500250027002800290030003200330034003500370038004000410043004500460048005000520054005500
Percentage of MortgageLoansOfPrivatelyHeldCompany100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mtb:OtherAssetsForItsInvestmentInCommonSecuritiesRecognizedByCompanyOfVariousTrusts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value232323232323232323232424242424242424242434343434343434343434
Percentage of OtherAssetsForItsInvestmentInCommonSecuritiesRecognizedByCompanyOfVariousTrusts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis

mtb:OtherCreditRelatedCommitments

us-gaap:FairValueInputsLevel3, us-gaap:EstimateOfFairValueFairValueDisclosure



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value142136130127131
Percentage of OtherCreditRelatedCommitments100.0100.0100.0100.0100.0

us-gaap:FairValueByMeasurementBasis

us-gaap:CarryingReportedAmountFairValueDisclosure



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value142136130127126131129127122125119121129136124125118122118121112119114117114118114119
Percentage of OtherCreditRelatedCommitments100.0100.0100.0100.00.0100.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:EstimateOfFairValueFairValueDisclosure



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value142136130127126131129127122125119121129136124125118122118121112119114117114118114119
Percentage of OtherCreditRelatedCommitments100.0100.0100.0100.00.0100.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

mtb:ReadilyMarketableSecuritiesAtEstimatedFairValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value1341401501517693
Percentage of ReadilyMarketableSecuritiesAtEstimatedFairValue100.0100.0100.0100.0100.0100.0

mtb:ReadilyMarketableSecuritiesAtFairValueAmortizedCost



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value1201051091144877
Percentage of ReadilyMarketableSecuritiesAtFairValueAmortizedCost100.0100.0100.0100.0100.0100.0

mtb:ReadilyMarketableSecuritiesAtFairValueGrossUnrealizedGains



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value133441372817
Percentage of ReadilyMarketableSecuritiesAtFairValueGrossUnrealizedGains100.0100.0100.0100.0100.0100.0

mtb:ResidentialMortgageLoansSecuredByResidentialRealEstateInProcessOfForeclosure



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value345402391380382391404433458497545576538314321305309315
Percentage of ResidentialMortgageLoansSecuredByResidentialRealEstateInProcessOfForeclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mtb:SavingsAndInterestCheckingDeposits



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value579565493255581532215293250963511085110752724516985293652871535425234649566
Percentage of SavingsAndInterestCheckingDeposits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis

us-gaap:FairValueInputsLevel2, us-gaap:EstimateOfFairValueFairValueDisclosure



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value5795654932555815322150963
Percentage of SavingsAndInterestCheckingDeposits100.0100.0100.0100.0100.0

us-gaap:FairValueByMeasurementBasis

us-gaap:CarryingReportedAmountFairValueDisclosure



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value579565493255581532215293250963511085110752724516985293652871535425234653065511265149749566
Percentage of SavingsAndInterestCheckingDeposits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0100.0

us-gaap:EstimateOfFairValueFairValueDisclosure



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value579565493255581532215293250963511085110752724516985293652871535425234653065511265149749566
Percentage of SavingsAndInterestCheckingDeposits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0100.0

us-gaap:ScheduleOfEquityMethodInvestmentEquityMethodInvesteeName

mtb:SubServicedResidentialMortgageLoansOfPrivatelyHeldCompany

mtb:BayviewFinancial



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value6190062800651006870054900568006030053500558005660059300499004080030400321003450036300377003950041500395004130043200446004650045600
Percentage of SubServicedResidentialMortgageLoansOfPrivatelyHeldCompany100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

mtb:TradingAccount



Period End2020-03-312019-12-312019-09-302018-12-31
Value1224470614185
Percentage of TradingAccount100.0100.0100.0100.0

mtb:UnfundedCommitmentsIncludesCarrryingAmountOfItsInvestments



Period End2020-03-312019-12-312019-09-302018-12-31
Value345414390280
Percentage of UnfundedCommitmentsIncludesCarrryingAmountOfItsInvestments100.0100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis

us-gaap:AccruedInvestmentIncomeReceivable

us-gaap:FairValueInputsLevel2, us-gaap:EstimateOfFairValueFairValueDisclosure



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value329333340362353
Percentage of AccruedInvestmentIncomeReceivable100.0100.0100.0100.0100.0

us-gaap:FairValueByMeasurementBasis

us-gaap:CarryingReportedAmountFairValueDisclosure



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value329333340362374353349333332327325310318308311299318306242228244227243223242222234222
Percentage of AccruedInvestmentIncomeReceivable100.0100.0100.0100.00.0100.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:EstimateOfFairValueFairValueDisclosure



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value329333340362374353349333332327325310318308311299318306242228244227243223242222234222
Percentage of AccruedInvestmentIncomeReceivable100.0100.0100.0100.00.0100.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncomeLossBeforeTax1



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-312011-12-31
Value285-279-108-152-390-569-735-702-663-493-408-444-480-485-188-166-247-414-267-356-249-2972066-41-105-326-395-586
Percentage of AccumulatedOtherComprehensiveIncomeLossBeforeTax1100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InvestmentType

us-gaap:SecuritiesInvestment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value18250409-85-200-310-269-227-59
Percentage of AccumulatedOtherComprehensiveIncomeLossBeforeTax164.0-18.1-37.0-6.221.935.142.238.334.312.2

us-gaap:StatementEquityComponents

mtb:AccumulatedOther



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-31
Value55413319318446-14-40-39-32-20-7-7-7-8-7-6-4-4-3-3-6-4-20000
Percentage of AccumulatedOtherComprehensiveIncomeLossBeforeTax1194.1-47.8-179.1-120.6-11.92.65.65.64.94.11.91.71.61.73.74.01.71.01.31.02.61.4-11.5-0.90.3-0.10.1

us-gaap:AccumulatedDefinedBenefitPlansAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-312011-12-31
Value-451-464-342-346-351-354-384-393-403-413-429-436-443-449-470-476-482-489-474-484-493-503-156-158-160-161-430-455-457
Percentage of AccumulatedOtherComprehensiveIncomeLossBeforeTax1-158.1165.9316.1226.890.162.352.256.160.883.8105.198.092.392.7249.7287.1195.1118.1177.2135.8197.6168.9-764.1-239.5383.7152.8132.0115.177.9

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-312009-12-312008-12-31
Value658865936584657765686579658565796572659065986604660366766689669066836680351134773445340933773347330232323192311230613025295128742857282828142800236723982408241124422897
Percentage of AdditionalPaidInCapital100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:AssetsFairValueDisclosure

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-312012-09-302012-03-312011-12-312011-09-302010-12-31
Value16214915215689118120112891219895109347113121162169258216159
Percentage of AssetsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-312012-09-302012-03-312011-12-312011-09-302010-12-31
Value797072258188865389389406990210940108731129012066125661308014414129641278555575370584851674865
Percentage of AssetsFairValueDisclosure4898.64827.65354.75521.69950.97970.78230.89746.712120.39322.512207.713204.511909.44143.911448.610484.93427.03170.42260.12385.13042.5

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-312012-09-302012-03-312011-12-312011-09-302010-12-31
Value35112417895111081312168295711931202121112911571
Percentage of AssetsFairValueDisclosure21.68.016.011.19.07.94.710.511.87.314.213.515.42.326.447.4735.8710.0468.3596.0982.8

us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-31
Value81687387836588279036953310027110641097311419121791267413207147701310812965691367076743731866756596
Percentage of AssetsFairValueDisclosure5020.24935.65470.75632.710059.98078.68335.59857.212232.19429.812321.813318.012024.84246.311575.010632.24262.80.03980.52828.53081.24125.3

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value21190896731161185
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancialInstrument

us-gaap:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprises



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value2108888662915959
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax99.697.798.498.396.095.383.369.9

us-gaap:OtherDebtSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value02111012
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax0.32.31.51.64.04.716.62.8

us-gaap:USStatesAndPoliticalSubdivisions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value1000.02000.04000.03000.04000.04000.09000.036000.0
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax0.00.00.00.00.00.00.10.0

us-gaap:USTreasuryAndGovernment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-09-30
Value147000.041000.066000.017000.04000.08000.0
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax0.10.00.10.00.00.1

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value19303947104203306127
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancialInstrument

us-gaap:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprises



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value12129379118228398
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax9.471.574.880.387.789.592.477.2

us-gaap:OtherDebtSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value17897711810
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax90.628.424.216.47.65.62.68.2

us-gaap:USStatesAndPoliticalSubdivisions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value2000.03000.03000.03000.04000.05000.05000.02000.0
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax0.00.00.00.00.00.00.00.0

us-gaap:USTreasuryAndGovernment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value0001491518
Percentage of AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax0.00.11.03.34.74.84.914.2

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value594862586934735983988869944910938
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancialInstrument

us-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprises



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value16000.016000.016000.016000.016000.024000.025000.028000.0
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis0.00.00.00.00.00.00.00.0

us-gaap:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprises



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value58026113643567897115738376868755
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis97.597.792.892.384.783.281.380.0

us-gaap:OtherDebtSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value134133138137137137137136
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis2.32.12.01.91.61.61.51.3

us-gaap:USStatesAndPoliticalSubdivisions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value00011112
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis0.00.00.00.00.00.00.00.0

us-gaap:USTreasuryAndGovernment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value1093594311144134616231965
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis0.20.25.25.913.615.217.218.0

us-gaap:AvailableForSaleSecuritiesDebtSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value613963186985738083258682915410896
Percentage of AvailableForSaleSecuritiesDebtSecurities100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value613963186985738083258682915410823
Percentage of AvailableForSaleSecuritiesDebtSecurities100.0100.0100.0100.0100.0100.0100.099.3

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value16000.016000.016000.016000.016000.022000.023000.028000.0
Percentage of AvailableForSaleSecuritiesDebtSecurities0.00.00.00.00.00.00.00.0

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring, us-gaap:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprises



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value60116180649468187216
Percentage of AvailableForSaleSecuritiesDebtSecurities97.997.893.092.483.1

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring, us-gaap:OtherDebtSecurities



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value117127130131126
Percentage of AvailableForSaleSecuritiesDebtSecurities1.92.01.91.81.5

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring, us-gaap:USStatesAndPoliticalSubdivisions



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value00011
Percentage of AvailableForSaleSecuritiesDebtSecurities0.00.00.00.00.0

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring, us-gaap:USTreasuryAndGovernment



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value1093594291336
Percentage of AvailableForSaleSecuritiesDebtSecurities0.20.25.15.815.4

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring, mtb:MortgageBackedSecuritiesIssuedByPrivateEnterprisesResidential



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value16000.016000.016000.016000.022000.0
Percentage of AvailableForSaleSecuritiesDebtSecurities0.00.00.00.00.0

us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value613963186985738083258682915410896
Percentage of AvailableForSaleSecuritiesDebtSecurities100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument

us-gaap:FairValueMeasurementsRecurring, mtb:MortgageBackedSecuritiesIssuedByPrivateEnterprisesResidential



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value16000.016000.016000.016000.022000.0
Percentage of AvailableForSaleSecuritiesDebtSecurities0.00.00.00.00.0

us-gaap:FairValueMeasurementsRecurring, us-gaap:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprises



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value60116180649468187216
Percentage of AvailableForSaleSecuritiesDebtSecurities97.997.893.092.483.1

us-gaap:FairValueMeasurementsRecurring, us-gaap:OtherDebtSecurities



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value117127130131126
Percentage of AvailableForSaleSecuritiesDebtSecurities1.92.01.91.81.5

us-gaap:FairValueMeasurementsRecurring, us-gaap:USStatesAndPoliticalSubdivisions



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value00011
Percentage of AvailableForSaleSecuritiesDebtSecurities0.00.00.00.00.0

us-gaap:FairValueMeasurementsRecurring, us-gaap:USTreasuryAndGovernment



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value1093594291336
Percentage of AvailableForSaleSecuritiesDebtSecurities0.20.25.15.815.4

us-gaap:FinancialInstrument

us-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprises



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value16000.016000.016000.016000.016000.022000.023000.028000.0
Percentage of AvailableForSaleSecuritiesDebtSecurities0.00.00.00.00.00.00.00.0

us-gaap:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprises



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value60116180649468187053721674128716
Percentage of AvailableForSaleSecuritiesDebtSecurities97.997.893.092.484.783.181.080.0

us-gaap:OtherDebtSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value117127130131131126131128
Percentage of AvailableForSaleSecuritiesDebtSecurities1.92.01.91.81.61.51.41.2

us-gaap:USStatesAndPoliticalSubdivisions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value00011112
Percentage of AvailableForSaleSecuritiesDebtSecurities0.00.00.00.00.00.00.00.0

us-gaap:USTreasuryAndGovernment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value1093594291139133616081947
Percentage of AvailableForSaleSecuritiesDebtSecurities0.20.25.15.813.715.417.617.9

us-gaap:CashAndDueFromBanks



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-312009-12-312008-12-31
Value1298143218181271126716051311136712911420136813441286132013321284117813681249134712691289144518271671157319411350123119831622142113441449134912979729081070103312261546
Percentage of CashAndDueFromBanks100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancialInstrument

us-gaap:CollateralAlreadyPostedAggregateFairValue

mtb:ClearinghouseCreditFacilities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312015-12-31
Value125841299871654854535249648311152
Percentage of CollateralAlreadyPostedAggregateFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value942061253734086282704852944887
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancialInstrument

us-gaap:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprises



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value402002210729115076564636283138
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger43.397.183.185.480.880.168.564.2

us-gaap:OtherDebtSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value5356776767666361
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger56.52.73.02.01.10.91.21.3

us-gaap:USStatesAndPoliticalSubdivisions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-09-302017-12-31
Value186000.0277000.0375000.0457000.0507000.0375000.0474000.0
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger0.20.00.00.00.00.00.0

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value12293846103198226112
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancialInstrument

us-gaap:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprises



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value02128379117920384
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss6.672.175.581.188.090.389.875.7

us-gaap:OtherDebtSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value1188779810
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss93.427.823.515.67.44.73.59.3

us-gaap:USStatesAndPoliticalSubdivisions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-09-302017-12-31
Value2000.03000.03000.03000.04000.01000.02000.0
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss0.00.00.00.00.00.00.0

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value130125260505545929992387
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancialInstrument

us-gaap:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprises



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value7711724041840529732106
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months59.193.692.29.533.488.299.288.2

us-gaap:OtherDebtSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value52620453653153
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months40.15.37.890.566.111.60.50.1

us-gaap:USTreasuryAndGovernment



Period End2020-03-312019-12-312019-03-312018-12-312018-09-302017-12-31
Value01009278
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months0.81.10.50.10.311.7

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value7010058015
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancialInstrument

us-gaap:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprises



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value1000028013
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss13.638.151.15.627.356.899.788.5

us-gaap:OtherDebtSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value60000200
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss86.360.748.994.472.443.00.20.2

us-gaap:USTreasuryAndGovernment



Period End2020-03-312019-12-312019-03-312018-12-312018-09-302017-12-31
Value000001
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss0.01.20.20.00.111.4

us-gaap:BalanceSheetLocation

us-gaap:DeferredRevenue

us-gaap:OtherLiabilities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value414343434343
Percentage of DeferredRevenue100.0100.0100.0100.0100.0100.0

us-gaap:Deposits



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-312009-12-312008-12-31
Value1001839477095113916819046990156891408927290946924329351393540970429549398136946509421491957729447262973594735827434169829686996711866552656616508965611640076254860912593945948259229505484980548654475384744942581
Percentage of Deposits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DepositsForeign



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-312009-12-312008-12-31
Value12171684156113641069811447261278177232195192201223193166170206167178176241237247322316284266104414023663953555145511063160565378910504047
Percentage of DepositsForeign100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis

us-gaap:FairValueInputsLevel2, us-gaap:EstimateOfFairValueFairValueDisclosure



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value1217168415611364811
Percentage of DepositsForeign100.0100.0100.0100.0100.0

us-gaap:FairValueByMeasurementBasis

us-gaap:CarryingReportedAmountFairValueDisclosure



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value121716841561136410698114472612781772321951922012231931661702061671781762412372473223161044
Percentage of DepositsForeign100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:EstimateOfFairValueFairValueDisclosure



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value121716841561136410698114472612781772321951922012231931661702061671781762412372473223161044
Percentage of DepositsForeign100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeAssetFairValueOfCollateral



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value0502316463732125212911921223537474674639293
Percentage of DerivativeAssetFairValueOfCollateral100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByMeasurementBasis, us-gaap:FinancialInstrument, us-gaap:HedgingDesignation

us-gaap:DerivativeAssetsLiabilitiesAtFairValueNet

us-gaap:CarryingReportedAmountFairValueDisclosure, us-gaap:LongTermDebt, us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value31793840385844854394
Percentage of DerivativeAssetsLiabilitiesAtFairValueNet100.0100.0100.0100.0100.0

us-gaap:EstimateOfFairValueFairValueDisclosure, us-gaap:LongTermDebt, us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value131436139-51
Percentage of DerivativeAssetsLiabilitiesAtFairValueNet4.11.11.60.9-1.2

us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:FinancialInstrument

us-gaap:DerivativeAverageFixedInterestRate

us-gaap:CashFlowHedging, mtb:InterestPaymentsOnVariableRateCommercialRealEstateLoans



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value0.02530.02440.02380.02380.0152
Percentage of DerivativeAverageFixedInterestRate100.0100.0100.0100.0100.0

us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:TradingActivityByType

us-gaap:FairValueHedging, mtb:FixedRateLongTermBorrowings



Period End2020-03-312019-12-312019-09-302019-06-302018-12-312016-12-312015-12-31
Value0.02610.02510.02510.02470.02470.03750.0442
Percentage of DerivativeAverageFixedInterestRate103.2102.9105.5103.8162.50.00.0

us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:FinancialInstrument

us-gaap:DerivativeAverageVariableInterestRate

us-gaap:CashFlowHedging, mtb:InterestPaymentsOnVariableRateCommercialRealEstateLoans



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value0.01090.01730.02060.02420.0235
Percentage of DerivativeAverageVariableInterestRate100.0100.0100.0100.0100.0

us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:TradingActivityByType

us-gaap:FairValueHedging, mtb:FixedRateLongTermBorrowings



Period End2020-03-312019-12-312019-09-302019-06-302018-12-312016-12-312015-12-31
Value0.01340.02270.02550.02950.03020.02080.0139
Percentage of DerivativeAverageVariableInterestRate122.9131.2123.8121.9128.50.00.0

us-gaap:DerivativeFairValueOfDerivativeAsset



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302009-12-31
Value1218427571425220148911019692131142144295405464406268361309386338316359367414440534537603681644588619643513429471615407
Percentage of DerivativeFairValueOfDerivativeAsset100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation

mtb:CommitmentsToSellRealEstateLoans, us-gaap:FairValueHedging, us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-312019-12-312019-09-302019-06-302018-12-312017-12-312016-12-312016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value0110103300101200116
Percentage of DerivativeFairValueOfDerivativeAsset0.10.30.20.20.70.811.20.00.10.70.23.90.20.20.50.31.7

us-gaap:InterestRateSwap, us-gaap:FairValueHedging, us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-312019-12-312019-09-302019-06-302018-12-312017-12-312016-12-312016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value40005011334143606372737693102
Percentage of DerivativeFairValueOfDerivativeAsset0.40.10.00.03.70.74.07.210.116.316.820.518.921.624.125.824.8

us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation

mtb:CommitmentsToSellRealEstateLoans, us-gaap:Nondesignated



Period End2020-03-312019-12-312019-09-302019-06-302018-12-312017-12-312016-12-312016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302011-12-31
Value3320325000021011266391121
Percentage of DerivativeFairValueOfDerivativeAsset0.30.70.40.12.52.71.80.10.10.20.00.90.40.20.40.40.81.51.67.30.30.30.40.2

mtb:ForeignExchangeAndOtherOptionAndFuturesContracts, us-gaap:Nondesignated



Period End2020-03-312019-12-312019-09-302019-06-302018-12-312017-12-312016-12-312016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302011-12-31
Value2012117105771781316373117781513101081319
Percentage of DerivativeFairValueOfDerivativeAsset1.72.92.01.77.16.12.71.74.43.23.75.39.89.25.42.22.43.83.12.02.01.42.03.1

mtb:MortgageRelatedCommitmentsToOriginateRealEstateLoansForSale, us-gaap:Nondesignated



Period End2020-03-312019-12-312019-09-302019-06-302018-12-312017-12-312016-12-312016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302011-12-31
Value3511241798821161017122617162213718163648707
Percentage of DerivativeFairValueOfDerivativeAsset2.92.84.34.16.39.52.74.64.23.84.94.16.85.15.36.23.81.84.13.06.78.010.31.3

us-gaap:InterestRateContract, us-gaap:Nondesignated



Period End2020-03-312019-12-312019-09-302019-06-302018-12-312017-12-312016-12-312016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302011-12-31
Value115339853239911874228401329203268202246215203234246274285302351399441443
Percentage of DerivativeFairValueOfDerivativeAsset94.793.293.193.979.780.277.586.481.175.874.365.363.963.664.465.166.966.464.856.765.466.364.871.6

us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation

us-gaap:FairValueHedging, us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-312019-12-312019-09-302019-06-302018-12-312017-12-312016-12-312016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value51106145334145617573737794109
Percentage of DerivativeFairValueOfDerivativeAsset0.40.30.20.24.41.515.37.310.217.017.124.419.021.824.526.126.5

us-gaap:HedgingDesignation

us-gaap:Nondesignated



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-31
Value121242556942421914283979491128136135249384431364222299233312264238265271304323368399458528494447471494370
Percentage of DerivativeFairValueOfDerivativeAsset99.699.799.899.899.495.690.995.898.298.597.295.794.084.794.792.789.883.082.975.681.078.275.573.973.973.573.569.074.476.177.576.776.176.276.978.5

us-gaap:DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value260471849363813781415151424234089106104134133167959871
Percentage of DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value260471849363813781311119211935374646746394183187218168164
Percentage of DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeFairValueOfDerivativeLiability



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302009-12-31
Value16487103104122190310290242139113119143176305368301162242176252212187216220254285301337384464444405440463373308336437308
Percentage of DerivativeFairValueOfDerivativeLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation

mtb:CommitmentsToSellRealEstateLoans, us-gaap:FairValueHedging, us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-312019-12-312019-09-302019-06-302018-12-312017-12-312016-12-312016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value1101166018305034260
Percentage of DerivativeFairValueOfDerivativeLiability6.80.51.916.03.40.20.82.31.10.42.10.31.42.01.33.00.2

us-gaap:InterestRateSwap, us-gaap:FairValueHedging, us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-312019-12-312019-09-302019-06-30
Value1165
Percentage of DerivativeFairValueOfDerivativeLiability0.92.36.05.6

us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation

mtb:CommitmentsToSellRealEstateLoans, us-gaap:Nondesignated



Period End2020-03-312019-12-312019-09-302019-06-302018-12-312017-12-312016-12-312016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302011-12-31
Value2631384107204184361071456222
Percentage of DerivativeFairValueOfDerivativeLiability15.94.112.97.72.40.70.22.10.80.51.71.13.42.01.73.20.90.12.64.71.71.74.90.6

mtb:ForeignExchangeAndOtherOptionAndFuturesContracts, us-gaap:Nondesignated



Period End2020-03-312019-12-312019-09-302019-06-302018-12-312017-12-312016-12-312016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302011-12-31
Value1711968566167111335291679151310981318
Percentage of DerivativeFairValueOfDerivativeLiability10.613.59.66.24.73.83.81.95.64.34.77.814.114.18.93.64.26.04.63.52.92.22.94.2

mtb:MortgageRelatedCommitmentsToOriginateRealEstateLoansForSale, us-gaap:Nondesignated



Period End2020-03-312019-12-312019-09-302019-06-302018-12-312017-12-312016-12-312016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302011-12-31
Value010010000001000013580001
Percentage of DerivativeFairValueOfDerivativeLiability0.01.40.20.20.80.40.40.00.00.20.10.90.00.00.10.10.61.41.82.90.00.10.00.2

us-gaap:InterestRateContract, us-gaap:Nondesignated



Period End2020-03-312019-12-312019-09-302019-06-302018-12-312017-12-312016-12-312016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302011-12-31
Value108687266169132167345278153221158204173165194207234248267317365410415
Percentage of DerivativeFairValueOfDerivativeLiability65.878.269.564.388.894.994.893.792.594.591.489.981.081.888.089.793.992.286.988.894.295.088.594.4

us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation

us-gaap:FairValueHedging, us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-312019-12-312019-09-302019-06-302018-12-312017-12-312016-12-312016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302013-12-31
Value1228226018305034260
Percentage of DerivativeFairValueOfDerivativeLiability7.72.87.821.63.40.20.82.31.10.42.10.31.42.01.33.00.2

us-gaap:HedgingDesignation

us-gaap:Nondesignated



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-31
Value151849581102184310284240138110118140175301360298161237175248207185209219253273300333381447439405438462335
Percentage of DerivativeFairValueOfDerivativeLiability92.397.292.278.483.296.699.898.299.499.897.599.298.499.298.797.798.999.697.999.798.698.098.796.599.599.895.999.998.899.096.498.899.899.599.699.7

us-gaap:DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302012-12-31
Value1515170522021354131722263485113985996124174161149177175107132281
Percentage of DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancialInstrument

us-gaap:DerivativeLiabilityFairValueOfCollateral

mtb:Counterparties



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-31
Value146506848201834412182223277952
Percentage of DerivativeLiabilityFairValueOfCollateral100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeNotionalAmount



Period End2020-03-312019-12-312019-09-302018-12-31
Value58150575504740019850
Percentage of DerivativeNotionalAmount100.0100.0100.0100.0

us-gaap:DerivativeInstrumentRisk

mtb:ForeignCurrencyAndOtherOptionAndFuturesContracts



Period End2020-03-312019-12-312019-09-302018-12-31
Value9281843763
Percentage of DerivativeNotionalAmount1.60.01.83.8

mtb:ForwardStartingInterestRateSwapAgreements



Period End2020-03-312019-12-312019-09-302018-12-31
Value41750126003030012600
Percentage of DerivativeNotionalAmount71.821.963.963.5

us-gaap:InterestRateContract



Period End2020-03-312019-12-312019-09-302018-12-31
Value36700486004760042900
Percentage of DerivativeNotionalAmount63.184.4100.4216.1

us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:FinancialInstrument

us-gaap:CashFlowHedging, mtb:InterestPaymentsOnVariableRateCommercialRealEstateLoans



Period End2020-03-312019-12-312019-09-302018-12-31
Value55100537504360015400
Percentage of DerivativeNotionalAmount94.893.492.077.6

us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:TradingActivityByType

us-gaap:FairValueHedging, mtb:FixedRateLongTermBorrowings



Period End2020-03-312019-12-312019-09-302018-12-31
Value3050380038004450
Percentage of DerivativeNotionalAmount5.26.68.022.4

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:EquitySecuritiesFvNi

us-gaap:FairValueInputsLevel1, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value11510010410943717273
Percentage of EquitySecuritiesFvNi100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value1839454233211727
Percentage of EquitySecuritiesFvNi16.539.244.138.876.930.524.137.9

us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value134140150151769390100
Percentage of EquitySecuritiesFvNi116.5139.2144.1138.8176.9130.5124.1137.9

us-gaap:FairValueByAssetClass, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue

mtb:OtherAssetsAndOtherLiabilities, us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value35102417774108813121672921169171117
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprises, us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value16000.016000.016000.016000.016000.022000.023000.024000.027000.028000.030000.035000.041000.044000.051000.057000.065000.074000.082000.088000.0103000.0
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue0.00.10.10.10.20.30.50.20.30.30.20.30.30.60.20.30.40.70.50.80.6

us-gaap:FairValueByAssetClass, us-gaap:FairValueByMeasurementFrequency, us-gaap:ValuationTechnique

mtb:OtherAssetsAndOtherLiabilities, us-gaap:FairValueMeasurementsRecurring, mtb:DiscountedCashFlows



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value351024177
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue100.0100.0100.0100.0100.0

us-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprises, us-gaap:FairValueMeasurementsRecurring, mtb:TwoIndependentPricingQuotes



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value16000.016000.016000.016000.022000.0
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue0.00.10.10.10.3

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementBasis

us-gaap:FederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchase

us-gaap:FairValueInputsLevel2, us-gaap:EstimateOfFairValueFairValueDisclosure



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value5962551346114398
Percentage of FederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchase100.0100.0100.0100.0100.0

us-gaap:FairValueByMeasurementBasis

us-gaap:CarryingReportedAmountFairValueDisclosure



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value59625513461136024398131032391626175200169518516321340717662132173153193192
Percentage of FederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchase100.0100.0100.0100.00.0100.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:EstimateOfFairValueFairValueDisclosure



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value59625513461136024398131032391626175200169518516321340717662132173153193192
Percentage of FederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchase100.0100.0100.0100.00.0100.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:FederalHomeLoanBankStockAndFederalReserveBankStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-12-302013-09-302012-12-31
Value381381510443419599410436478415414498461461461469536554336336328328328350298298298298302
Percentage of FederalHomeLoanBankStockAndFederalReserveBankStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312011-09-302010-12-31
Value530518461348244222254223235244261265280300317298336317245309269
Percentage of FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableRecordedInvestmentCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value91183879998691687441862488614084280853288519185325851908634786596879688686785715849528440066788663046533264785635256256461901616646116663487632086385457167
Percentage of FinancingReceivableRecordedInvestmentCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CreditFacility, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

mtb:RevolvingLoansConvertedToTermLoans, mtb:HomeEquityLinesAndLoans



Period End2020-03-31
Value1383
Percentage of FinancingReceivableRecordedInvestmentCurrent1.5

mtb:RevolvingLoansConvertedToTermLoans, mtb:OtherLoans



Period End2020-03-31
Value2
Percentage of FinancingReceivableRecordedInvestmentCurrent0.0

us-gaap:RevolvingCreditFacility, mtb:HomeEquityLinesAndLoans



Period End2020-03-31
Value2822
Percentage of FinancingReceivableRecordedInvestmentCurrent3.1

us-gaap:RevolvingCreditFacility, mtb:OtherLoans



Period End2020-03-31
Value931
Percentage of FinancingReceivableRecordedInvestmentCurrent1.0

us-gaap:RevolvingCreditFacility, mtb:ResidentialRealEstateExcludingAltA



Period End2020-03-31
Value45
Percentage of FinancingReceivableRecordedInvestmentCurrent0.1

us-gaap:ExtinguishmentOfDebt, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

mtb:LongTermDebtPriorPeriod, mtb:HomeEquityLinesAndLoans



Period End2020-03-31
Value68
Percentage of FinancingReceivableRecordedInvestmentCurrent0.1

mtb:LongTermDebtPriorPeriod, mtb:OtherLoans



Period End2020-03-31
Value40
Percentage of FinancingReceivableRecordedInvestmentCurrent0.0

mtb:LongTermDebtPriorPeriod, mtb:RecreationalFinance



Period End2020-03-31
Value723
Percentage of FinancingReceivableRecordedInvestmentCurrent0.8

mtb:LongTermDebtPriorPeriod, mtb:ResidentialLimitedDocumentation



Period End2020-03-31
Value1755
Percentage of FinancingReceivableRecordedInvestmentCurrent1.9

mtb:LongTermDebtPriorPeriod, mtb:ResidentialRealEstateExcludingAltA



Period End2020-03-31
Value8094
Percentage of FinancingReceivableRecordedInvestmentCurrent8.9

mtb:LongTermDebtPriorPeriod, us-gaap:AutomobileLoan



Period End2020-03-31
Value155
Percentage of FinancingReceivableRecordedInvestmentCurrent0.2

us-gaap:LongTermDebt, mtb:HomeEquityLinesAndLoans



Period End2020-03-312019-12-312018-12-312017-12-312016-12-31
Value05330
Percentage of FinancingReceivableRecordedInvestmentCurrent0.00.00.00.00.0

us-gaap:LongTermDebt, mtb:OtherLoans



Period End2020-03-312019-12-312018-12-312017-12-312016-12-31
Value60191835411
Percentage of FinancingReceivableRecordedInvestmentCurrent0.10.20.10.10.0

us-gaap:LongTermDebt, mtb:RecreationalFinance



Period End2020-03-312019-12-312018-12-312017-12-312016-12-31
Value56621511126775435
Percentage of FinancingReceivableRecordedInvestmentCurrent0.62.41.30.90.5

us-gaap:LongTermDebt, mtb:ResidentialRealEstateExcludingAltA



Period End2020-03-312019-12-312018-12-312017-12-312016-12-31
Value7041520650641756
Percentage of FinancingReceivableRecordedInvestmentCurrent0.81.70.80.80.9

us-gaap:LongTermDebt, us-gaap:AutomobileLoan



Period End2020-03-312019-12-312018-12-312017-12-312016-12-31
Value3881449884670295
Percentage of FinancingReceivableRecordedInvestmentCurrent0.41.61.00.80.3

us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

mtb:CommercialFinancialLeasing



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value257272329022689231772270122701213172161521377213322148621936219862228721601211572091120122199651985219519192281885518489
Percentage of FinancingReceivableRecordedInvestmentCurrent28.226.526.126.526.326.425.325.325.125.025.225.425.425.324.924.724.623.829.929.929.929.729.730.0

mtb:CommercialRealEstateExcludingResidentialBuilderAndDeveloperAndOtherConstruction



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value271482631125613258292544125250246502535224919249102472425237250882507624283233902374023645231842248722225222082164621236
Percentage of FinancingReceivableRecordedInvestmentCurrent29.829.929.529.529.529.329.229.729.329.229.029.229.028.528.027.327.928.034.733.934.034.334.134.4

mtb:HomeEquityLinesAndLoans



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value428743864486456246344758485049315037517152755337539855025586565857205805571057655783585959095972
Percentage of FinancingReceivableRecordedInvestmentCurrent4.75.05.25.25.45.55.85.85.96.16.26.26.26.36.46.66.76.98.68.78.99.09.39.7

mtb:OtherCommercialConstruction



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value742772047229721770366982679265976680640759525808574759855525499336633428349336423575348433922986
Percentage of FinancingReceivableRecordedInvestmentCurrent8.18.28.38.38.28.18.17.77.87.57.06.76.66.86.45.84.34.15.25.55.55.45.34.8

mtb:OtherLoans



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value137413951373131512571271514448074523434941203814351934913410323230833051308429962921290928692726
Percentage of FinancingReceivableRecordedInvestmentCurrent1.51.61.61.51.51.56.15.65.35.14.84.44.14.03.93.83.63.64.64.54.54.54.54.4

mtb:RecreationalFinance



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value5778548452624759429540853229
Percentage of FinancingReceivableRecordedInvestmentCurrent6.36.26.15.45.04.73.8

mtb:ResidentialBuilderAndDeveloper



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value142615211546166517381665163116281641161816041639171418841814181917471507147916661460127312111025
Percentage of FinancingReceivableRecordedInvestmentCurrent1.61.71.81.92.01.91.91.91.91.91.91.92.02.12.12.12.11.82.22.52.22.01.91.7

mtb:ResidentialLimitedDocumentation



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-31
Value175518581968206721862278237324882599271828292968308632393400358437573885249
Percentage of FinancingReceivableRecordedInvestmentCurrent1.92.12.32.42.52.62.82.93.13.23.33.43.63.73.94.24.44.60.4

mtb:ResidentialRealEstateExcludingAltA



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value12414127601297513206133371359113989144561494215376158681643817004176311843819208197472050773237640
Percentage of FinancingReceivableRecordedInvestmentCurrent13.614.514.915.115.515.816.616.917.518.018.619.019.620.021.222.423.224.311.011.8

us-gaap:AutomobileLoan



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value384337873767363936193555352734503468344133273166304928692805266925802446231921342024193118081314
Percentage of FinancingReceivableRecordedInvestmentCurrent4.24.34.34.24.24.14.24.04.14.03.93.73.53.33.23.13.02.93.53.23.13.02.82.1

us-gaap:FairValueByMeasurementFrequency

us-gaap:ForeclosedAssets

us-gaap:FairValueMeasurementsNonrecurring



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-31
Value142117179283230195336373256533362291513111921151129
Percentage of ForeclosedAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:HeldToMaturitySecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-03-312009-12-312008-12-31
Value230026563031360437143316341831013228335332423388287624572409257427302859299831643360350736353760387339663319181995910321121118810001077116112191262132414251509567485
Percentage of HeldToMaturitySecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancialInstrument

us-gaap:MortgageBackedSecuritiesIssuedByPrivateEnterprises



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value899399104107113117122135
Percentage of HeldToMaturitySecurities3.93.53.32.92.93.43.54.04.0

us-gaap:MortgageBackedSecuritiesIssuedByUSGovernmentSponsoredEnterprises



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value220223062424254326522745284229603187
Percentage of HeldToMaturitySecurities95.786.880.070.671.482.883.295.595.1

us-gaap:OtherDebtSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value333333345
Percentage of HeldToMaturitySecurities0.10.10.10.10.10.10.10.10.1

us-gaap:USStatesAndPoliticalSubdivisions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value2445678<