ZION


Line plots across dimensions of each concept
Tables

Table of contents



us-gaap:CommonStockSharesIssued

us-gaap:CommonStockSharesOutstanding
us-gaap:StatementEquityComponents

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareDiluted
dei:LegalEntity
us-gaap:Revenues
us-gaap:StatementBusinessSegments

us-gaap:InterestExpense

us-gaap:InterestExpenseDebt

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic
dei:LegalEntity
us-gaap:StatementBusinessSegments

us-gaap:IncomeTaxExpenseBenefit
us-gaap:DerivativeInstrumentRisk, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:IncomeTaxesPaidNet

us-gaap:ProfitLoss
us-gaap:StatementEquityComponents

us-gaap:ComprehensiveIncomeNetOfTax

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted

us-gaap:Assets

us-gaap:Liabilities

us-gaap:LiabilitiesAndStockholdersEquity

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:IntangibleAssetsNetIncludingGoodwill

us-gaap:DeferredTaxAssetsLiabilitiesNet

us-gaap:LongTermDebt
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument

us-gaap:RetainedEarningsAccumulatedDeficit

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax
us-gaap:RetirementPlanType

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:ProfitLoss
us-gaap:StatementEquityComponents

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:PaymentsOfDividends

us-gaap:PaymentsOfDividends

us-gaap:PaymentsForRepurchaseOfCommonStock

us-gaap:DebtInstrumentInterestRateStatedPercentage

us-gaap:EffectiveIncomeTaxRateContinuingOperations

us-gaap:ShareBasedCompensation

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:ProceedsFromRepaymentsOfShortTermDebt

us-gaap:AdvertisingExpense

us-gaap:AllowanceForLoanAndLeaseLossRecoveryOfBadDebts
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:AllowanceForLoanAndLeaseLossesAdjustmentsNet
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:AllowanceForLoanAndLeaseLossesWriteOffs
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:CommonStockDividendsPerShareDeclared

us-gaap:DebtAndEquitySecuritiesGainLoss

us-gaap:DeferredIncomeTaxExpenseBenefit
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAmortizationOfGainsLosses
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanExpectedReturnOnPlanAssets
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanInterestCost
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1

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

us-gaap:DistributedEarnings

us-gaap:Dividends
us-gaap:StatementEquityComponents
us-gaap:DividendsCommonStock
us-gaap:StatementEquityComponents
us-gaap:DividendsPreferredStock

us-gaap:EquipmentExpense

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1
us-gaap:FairValueByAssetClass
us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases
us-gaap:FairValueByAssetClass
us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales

us-gaap:FairValueOptionChangesInFairValueGainLoss1
us-gaap:FinancialInstrument

us-gaap:FederalDepositInsuranceCorporationPremiumExpense

us-gaap:FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, zions:FinancialReceivables
zions:FinancialReceivables
us-gaap:DerivativeInstrumentRisk, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents
us-gaap:GainLossOnDerivativeInstrumentsNetPretax

us-gaap:GainLossOnInvestments
dei:LegalEntity
us-gaap:GainsLossesOnSalesOfOtherRealEstate
us-gaap:FinancialInstrument
us-gaap:StatementBusinessSegments

us-gaap:IncreaseDecreaseInDeposits

us-gaap:IncreaseDecreaseInFairValueOfHedgedItemInInterestRateFairValueHedge1

us-gaap:IncreaseDecreaseInLoansHeldForSale

us-gaap:IncreaseDecreaseInOperatingLiabilities

us-gaap:IncreaseDecreaseInOtherOperatingAssets

us-gaap:IncreaseDecreaseInTradingSecurities

us-gaap:InterestAndDividendIncomeOperating

us-gaap:InterestAndFeeIncomeLoansAndLeases

us-gaap:InterestExpenseDeposits

us-gaap:InterestIncomeExpenseAfterProvisionForLoanLoss
dei:LegalEntity
us-gaap:StatementBusinessSegments

us-gaap:InterestIncomeExpenseNet
dei:LegalEntity
us-gaap:StatementBusinessSegments

us-gaap:InterestIncomeMoneyMarketDeposits

us-gaap:InterestPaid

us-gaap:InvestmentIncomeInterest
us-gaap:InvestmentType
us-gaap:InvestmentType, zions:TaxableVSNontaxableIncome
zions:TaxableVSNontaxableIncome

us-gaap:InvestmentIncomeNonoperating

us-gaap:LaborAndRelatedExpense

us-gaap:LeaseCost

us-gaap:LoansAndLeasesReceivableGainLossOnSalesNet

us-gaap:NoninterestExpense
dei:LegalEntity
us-gaap:StatementBusinessSegments

us-gaap:NoninterestIncome
dei:LegalEntity
us-gaap:StatementBusinessSegments
dei:LegalEntity
us-gaap:NoninterestIncomeOtherOperatingIncome
us-gaap:StatementBusinessSegments

us-gaap:OccupancyNet

us-gaap:OperatingLeaseLeaseIncome

us-gaap:OperatingLeasePayments

us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax
us-gaap:RetirementPlanType
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation
us-gaap:OtherComprehensiveIncomeLossDerivativeExcludedComponentIncreaseDecreaseAdjustmentsBeforeTax
us-gaap:HedgingDesignation

us-gaap:OtherComprehensiveIncomeLossNetOfTax
us-gaap:RetirementPlanType
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax

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

us-gaap:OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax
us-gaap:RetirementPlanType
us-gaap:OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax
us-gaap:RetirementPlanType
us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax

us-gaap:OtherNoncashIncomeExpense

us-gaap:OtherNoninterestExpense

us-gaap:OtherPreferredStockDividendsAndAdjustments

us-gaap:OtherRevenueExpenseFromRealEstateOperations

us-gaap:PaymentsForOriginationAndPurchasesOfLoansHeldForSale

us-gaap:PaymentsForProceedsFromOtherInvestingActivities

us-gaap:PaymentsForProceedsFromOtherLoansAndLeases

us-gaap:PaymentsForProceedsFromShortTermInvestments

us-gaap:PaymentsToAcquireAvailableForSaleSecurities

us-gaap:PaymentsToAcquireHeldToMaturitySecurities
us-gaap:StatementClassOfStock
us-gaap:PreferredStockDividendRatePercentage

us-gaap:ProceedsFromIssuanceOfCommonStock

us-gaap:ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities

us-gaap:ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities

us-gaap:ProceedsFromRepaymentsOfDebt

us-gaap:ProfessionalFees

us-gaap:ProvisionForLoanAndLeaseLosses
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax
us-gaap:RetirementPlanType
us-gaap:DerivativeInstrumentRisk, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents
us-gaap:ReclassificationFromAociCurrentPeriodTax

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability

us-gaap:SalesTypeAndDirectFinancingLeasesProfitLoss
us-gaap:StatementEquityComponents
us-gaap:StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures

us-gaap:StockRepurchasedDuringPeriodShares
us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents
us-gaap:StockRepurchasedDuringPeriodValue

us-gaap:TransferOfPortfolioLoansAndLeasesToHeldForSale1

us-gaap:TransferToOtherRealEstate

us-gaap:UndistributedEarnings

us-gaap:UndistributedEarningsLossAvailableToCommonShareholdersDiluted

us-gaap:VariableLeaseCost
us-gaap:InformationByCategoryOfDebtSecurity
zions:AvailableForSaleDebtSecuritiesGrossUnrealizedGainsRecognizedInOCI
us-gaap:InformationByCategoryOfDebtSecurity
zions:AvailableForSaleDebtSecuritiesGrossUnrealizedLossesRecognizedInOCI
dei:LegalEntity
zions:AverageDeposits
us-gaap:StatementBusinessSegments
dei:LegalEntity
zions:AverageLoansAndLeases
us-gaap:StatementBusinessSegments

zions:CapitalMarketsAndForeignExchangeGainLoss
dei:LegalEntity

zions:CardFees
dei:LegalEntity
us-gaap:StatementBusinessSegments

zions:CommercialAccountFees
dei:LegalEntity
us-gaap:StatementBusinessSegments

zions:CreditAndCollectionServices
us-gaap:StatementEquityComponents
zions:CumulativeEffectAdjustmentMeasurementOfCreditLossesOnFinancialInstruments
us-gaap:InformationByCategoryOfDebtSecurity
zions:DebSecuritiesHeldtomaturityGrossUnrealizedGains
us-gaap:InformationByCategoryOfDebtSecurity
zions:DebtSecuritiesHeldtomaturityGrossUnrealizedLosses

zions:DerivativeGainRecognizedOnUndesignatedDerivatives
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation
zions:DerivativeInstrumentNoninterestIncomeExpense
us-gaap:FinancialInstrument, us-gaap:HedgingDesignation
us-gaap:HedgingDesignation

zions:DilutiveEffectOfRestrictedStockAwardsAndUnits

zions:DilutiveEffectofCommonStockWarrants

zions:DilutiveEffectofStockOptions
us-gaap:StatementEquityComponents
zions:EmployeePlansAccumulatedPaidinCapital
us-gaap:FairValueByAssetClass
zions:FairValueAssetsMeasuredOnRecurringBasisAndGainLossIncludedInEquitySecuritiesGainsLossesNet
us-gaap:FairValueByAssetClass
zions:FairValueMeasurementwithUnobservableInputsReconciliationRecurringBasisAssetNoninterestIncome

zions:GrossUnrealizedGainsofInvestmentSecuritiesRecognizedinOCI

zions:GrossUnrealizedLossesofInvestmentSecuritiesRecognizedinOCI

zions:LoanRelatedFeesAndIncome

zions:LoansModifiedAsTroubledDebtRestructuringsLoans
us-gaap:StatementEquityComponents
zions:NetSharesIssuedFromStockWarrantExercises

zions:Netchangeinothernoninterestbearinginvestments

zions:Netunrealizedgainslossesonothernoninterestbearinginvestments

zions:NoninterestincomeCustomerrelatedFees
dei:LegalEntity
us-gaap:StatementBusinessSegments

zions:OtherCustomerRelatedFees
dei:LegalEntity
zions:OtherNonInterestIncomeNonCustomerRelatedGainLoss
us-gaap:StatementBusinessSegments

zions:OtherNoninterestBearingInvestmentsNonmarketableEquitySecuritiesGrossGains

zions:OtherNoninterestBearingInvestmentsNonmarketableEquitySecuritiesGrossLosses
dei:LegalEntity
zions:OtherNoninterestIncomeFromContractsWithCustomers
us-gaap:StatementBusinessSegments
dei:LegalEntity
zions:OtherNoninterestIncomeLossNonASC606CustomerRelated
us-gaap:StatementBusinessSegments

zions:PrincipleAmountOfLoansHeldForSaleSold

zions:ProvisionforCreditLosses
dei:LegalEntity
us-gaap:StatementBusinessSegments

zions:ProvisionforUnfundedLendingCommitmentsdecrease
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

zions:RetailAndBusinessBankingFees
dei:LegalEntity
us-gaap:StatementBusinessSegments
dei:LegalEntity
zions:TotalnoninterestincomefromcontractswithcustomersASC606
us-gaap:StatementBusinessSegments

zions:UndistributedEarningsApplicabletoNonvestedShares

zions:WealthManagementAndTrustFees
dei:LegalEntity
us-gaap:StatementBusinessSegments

us-gaap:AdditionalPaidInCapital
us-gaap:StatementEquityComponents

us-gaap:AssetsFairValueDisclosure
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument
us-gaap:FinancialInstrument
us-gaap:InformationByCategoryOfDebtSecurity
us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis
us-gaap:InformationByCategoryOfDebtSecurity, zions:SecuritiesMaturity

us-gaap:AvailableForSaleSecurities

us-gaap:AvailableForSaleSecuritiesAmortizedCost
zions:SecuritiesMaturity
us-gaap:FinancialInstrument
us-gaap:AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue
us-gaap:InformationByCategoryOfDebtSecurity
us-gaap:FinancialInstrument
us-gaap:AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue
us-gaap:InformationByCategoryOfDebtSecurity
us-gaap:FinancialInstrument
us-gaap:AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue
us-gaap:InformationByCategoryOfDebtSecurity
us-gaap:InformationByCategoryOfDebtSecurity
us-gaap:AvailableForSaleSecuritiesDebtSecurities

us-gaap:AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1

us-gaap:CapitalLeaseObligations

us-gaap:CashAndDueFromBanks

us-gaap:DebtInstrumentCarryingAmount
us-gaap:FinancialInstrument
us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss
us-gaap:InformationByCategoryOfDebtSecurity
us-gaap:FinancialInstrument
us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss
us-gaap:InformationByCategoryOfDebtSecurity
us-gaap:InformationByCategoryOfDebtSecurity, zions:SecuritiesMaturity
us-gaap:DebtSecuritiesAvailableForSaleMaturityAfterFiveThroughTenYearsWeightedAverageYield
zions:SecuritiesMaturity
us-gaap:InformationByCategoryOfDebtSecurity, zions:SecuritiesMaturity
us-gaap:DebtSecuritiesAvailableForSaleMaturityAfterOneThroughFiveYearsWeightedAverageYield
zions:SecuritiesMaturity
us-gaap:InformationByCategoryOfDebtSecurity, zions:SecuritiesMaturity
us-gaap:DebtSecuritiesAvailableForSaleMaturityRollingAfter10YearsWeightedAverageYield
zions:SecuritiesMaturity
us-gaap:InformationByCategoryOfDebtSecurity, zions:SecuritiesMaturity
us-gaap:DebtSecuritiesAvailableForSaleMaturityWithinOneYearWeightedAverageYield
zions:SecuritiesMaturity
us-gaap:FinancialInstrument
us-gaap:DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss
us-gaap:InformationByCategoryOfDebtSecurity

us-gaap:Deposits

us-gaap:DepositsSavingsDeposits
us-gaap:BalanceSheetLocation
us-gaap:DerivativeFairValueOfDerivativeAsset
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:FinancialInstrument, us-gaap:HedgingDesignation
us-gaap:BalanceSheetLocation, us-gaap:FinancialInstrument, us-gaap:HedgingDesignation
us-gaap:BalanceSheetLocation, us-gaap:HedgingDesignation
us-gaap:BalanceSheetLocation
us-gaap:DerivativeFairValueOfDerivativeLiability
us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:FinancialInstrument, us-gaap:HedgingDesignation
us-gaap:BalanceSheetLocation, us-gaap:FinancialInstrument, us-gaap:HedgingDesignation
us-gaap:BalanceSheetLocation, us-gaap:HedgingDesignation
us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:FinancialInstrument, us-gaap:HedgingDesignation
us-gaap:DerivativeNotionalAmount
us-gaap:FinancialInstrument
us-gaap:FinancialInstrument, us-gaap:HedgingDesignation
us-gaap:HedgingDesignation

us-gaap:EquityMethodInvestmentsFairValueDisclosure
us-gaap:FairValueByAssetClass
us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue

us-gaap:FederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchase

us-gaap:FederalFundsSoldAndSecuritiesPurchasedUnderAgreementsToResell

us-gaap:FederalHomeLoanBankStockAndFederalReserveBankStock

us-gaap:FinanceLeaseWeightedAverageDiscountRatePercent

us-gaap:FinancialInstrumentsSoldNotYetPurchasedAtFairValue
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableNonaccrualNoAllowance

us-gaap:FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:FinancingReceivablesPeriodPastDue

us-gaap:FinancingReceivableRecordedInvestmentCurrent
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:FinancingReceivablesPeriodPastDue
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableRecordedInvestmentNonaccrualStatus
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:FinancingReceivablesPeriodPastDue

us-gaap:FinancingReceivableRecordedInvestmentPastDue
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship
us-gaap:HedgedLiabilityFairValueHedge
us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship
us-gaap:HedgedLiabilityFairValueHedgeCumulativeIncreaseDecrease
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:HeldToMaturitySecurities
us-gaap:InformationByCategoryOfDebtSecurity
us-gaap:HeldToMaturitySecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss
us-gaap:InformationByCategoryOfDebtSecurity
us-gaap:HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLoss
us-gaap:InformationByCategoryOfDebtSecurity
us-gaap:HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue
us-gaap:InformationByCategoryOfDebtSecurity
us-gaap:HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss
us-gaap:InformationByCategoryOfDebtSecurity
us-gaap:HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue
us-gaap:InformationByCategoryOfDebtSecurity
us-gaap:HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument
us-gaap:HeldToMaturitySecuritiesFairValue
us-gaap:InformationByCategoryOfDebtSecurity

us-gaap:HeldToMaturitySecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions

us-gaap:InterestBearingDepositsInBanks

us-gaap:InvestmentsFairValueDisclosure

us-gaap:LiabilitiesFairValueDisclosure
us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:LoansAndLeasesReceivableAllowance
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:StatementBusinessSegments
us-gaap:LoansAndLeasesReceivableBeforeFeesGross

us-gaap:LoansAndLeasesReceivableCollateralForSecuredBorrowings

us-gaap:LoansAndLeasesReceivableDeferredIncome

us-gaap:LoansAndLeasesReceivableGrossCarryingAmount

us-gaap:LoansAndLeasesReceivableNetOfDeferredIncome
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:LoansAndLeasesReceivableNetReportedAmount
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument

us-gaap:LoansAndLeasesReceivableNetReportedAmountCoveredAndNotCovered

us-gaap:LoansReceivableHeldForSaleNetNotPartOfDisposalGroup
us-gaap:Range
us-gaap:LossContingencyEstimateOfPossibleLoss

us-gaap:MarketableSecurities

us-gaap:NoninterestBearingDepositLiabilities

us-gaap:OperatingLeaseLiability

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent

us-gaap:OtherAssets
us-gaap:DeferredCompensationArrangementWithIndividualPostretirementBenefitsByTypeOfDeferredCompensation
us-gaap:OtherAssetsFairValueDisclosure
us-gaap:DeferredCompensationArrangementWithIndividualPostretirementBenefitsByTypeOfDeferredCompensation, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument
us-gaap:FinancialInstrument

us-gaap:OtherInvestments

us-gaap:OtherLiabilities
us-gaap:DeferredCompensationArrangementWithIndividualPostretirementBenefitsByTypeOfDeferredCompensation
us-gaap:OtherLiabilitiesFairValueDisclosure
us-gaap:DeferredCompensationArrangementWithIndividualPostretirementBenefitsByTypeOfDeferredCompensation, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument
us-gaap:FinancialInstrument

us-gaap:OtherRealEstate

us-gaap:OtherRealEstateAndForeclosedAssets

us-gaap:PledgedFinancialInstrumentsNotSeparatelyReportedSecuritiesPledged

us-gaap:PreferredStockValue

us-gaap:SalesTypeAndDirectFinancingLeasesLeaseReceivable

us-gaap:SeniorNotes

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
us-gaap:StatementEquityComponents

us-gaap:SubordinatedDebt
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:TimeDeposits
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument

us-gaap:TradingSecurities
us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:UnusedCommitmentsToExtendCredit
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
zions:AccruedInterestReceivableWriteOff

zions:AllowanceForLoanAndLeaseLossesAndReserveForUnfundedLendingCommitments
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

zions:Amortizedcostofinvestmentsecurities
zions:SecuritiesMaturity
us-gaap:BalanceSheetLocation, us-gaap:FinancialInstrument
zions:CashCollateralReceivedPledged

zions:ChangeInFairValueOfDerivativeAssetByCreditValueAdjustment

zions:CommercialLendingLoansOwnerOccupied

zions:CommercialLettersOfCredit

zions:CommercialRealEstateTermLoans

zions:DebtSecuritiesAvailableForSaleMaturityTotalWeightedAverageYield
us-gaap:InformationByCategoryOfDebtSecurity

zions:DebtSecuritiesMaturityTotalWeightedAverageYield
zions:SecuritiesMaturity

zions:EstimatedFairValueofInvestmentSecurities
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
zions:FinancingReceivableNonaccrualRelatedAllowance
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
zions:FinancingReceivableNonaccrualWithAllowance

zions:FinancingReceivableRecordedInvestmentNonaccrualStatusThatAreCurrent
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

zions:FinancingReceivableRecordedInvestmentThirtyToEightyNineDaysPastDue
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:FinancingReceivablesPeriodPastDue

zions:FinancingReceivableRecordedInvestmentsEqualToandGreaterThan90DaysPastDue
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
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us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
zions:TermLoansCreditQualityOutstandingOwnerOccupiedAmortizedCostBasisOriginatedThreeYearsBeforeLatestFiscalYear
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
zions:TermLoansCreditQualityOutstandingOwnerOccupiedAmortizedCostBasisOriginatedTwoYearsBeforeLatestFiscalYear
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
zions:TermLoansCreditQualityOutstandingTermAmortizedCostBasisOriginatedFiveOrMoreYearsBeforeLatestFiscalYear
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
zions:TermLoansCreditQualityOutstandingTermAmortizedCostBasisOriginatedFourYearsBeforeLatestFiscalYear
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
zions:TermLoansCreditQualityOutstandingTermAmortizedCostBasisOriginatedInCurrentFiscalYear
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
zions:TermLoansCreditQualityOutstandingTermAmortizedCostBasisOriginatedInFiscalYearBeforeLatestFiscalYear
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
zions:TermLoansCreditQualityOutstandingTermAmortizedCostBasisOriginatedThreeYearsBeforeLatestFiscalYear
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
zions:TermLoansCreditQualityOutstandingTermAmortizedCostBasisOriginatedTwoYearsBeforeLatestFiscalYear
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
zions:TotalLoansCreditQualityOutstanding14FamilyResidentialAmortizedCostBasis
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
zions:TotalLoansCreditQualityOutstandingBankcardAndOtherRevolvingPlansAmortizedCostBasis
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
zions:TotalLoansCreditQualityOutstandingCommercialAndIndustrialAmortizedCostBasis
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
zions:TotalLoansCreditQualityOutstandingConstructionAndLandDevelopmentAmortizedCostBasis
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
zions:TotalLoansCreditQualityOutstandingConstructionAndOtherConsumerRealEstateAmortizedCostBasis
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
zions:TotalLoansCreditQualityOutstandingHomeEquityCreditLineAmortizedCostBasis
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
zions:TotalLoansCreditQualityOutstandingLeasingAmortizedCostBasis
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
zions:TotalLoansCreditQualityOutstandingMunicipalAmortizedCostBasis
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
zions:TotalLoansCreditQualityOutstandingOtherConsumerAmortizedCostBasis
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
zions:TotalLoansCreditQualityOutstandingOwnerOccupiedAmortizedCostBasis
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
zions:TotalLoansCreditQualityOutstandingTermAmortizedCostBasis
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment

zions:TotalUnfundedLendingCommitments

zions:UnfundedLendingCommitmentsonTroubledDebtRestructuring

Tables

  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-09-302009-06-30
us-gaap:CommonStockSharesIssued ▄▄▅▅▆▆▇▇▇▇▇████████████▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▅▄▂▁163165170176182187192195197197199202202203203205204204204203203203202185184184184184184184184184184184184184183182177173160136125
us-gaap:CommonStockSharesOutstanding ▄▄▅▅▆▆▇▇▇▇▇████████████▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▅▄▂▁163165170176182187192195197197199202202203203205204204204203203203202185184184184184184184184184184184184184183182177173160136125
 us-gaap:CommonStockSharesOutstanding us-gaap:StatementEquityComponents us-gaap:CommonStock▄▄▅▅▆▆▇▇▇▇▇████████████▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▅▄▂▁163165170176182187192195197197199202202203203205204204204203203203202185184184184184184184184184184184184184183182177173160136125
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding 172NA181189195NA205209210NA209208210NA204204204NA204202202NA197185185NA184184183NA183183182NA182182181NA172161151127115
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic 164NA173179184NA192195196NA200201202NA204204203NA203202202NA196184184NA184183183NA183182182NA182182181NA172161151127115
us-gaap:EarningsPerShareBasic ▅▇█████▇█▆▇▇▆▆▆▆▆▆▆▅▆▆▆▆▆▄█▆▆▅▆▆▅▅▆▅▅▃▄▃▃▁▄0.041.031.231.051.11.141.110.951.160.570.750.760.630.610.570.440.380.430.41-0.010.370.330.40.560.41-0.321.130.30.480.190.340.30.140.240.350.160.08-0.62-0.47-0.84-0.57-1.43-0.21
us-gaap:EarningsPerShareDiluted ▅▇█████▇█▆▇▇▆▆▆▆▆▆▆▅▆▆▆▆▆▄█▆▆▅▆▆▅▅▆▅▅▃▄▃▃▁▄0.040.971.170.991.041.081.040.891.090.540.720.730.610.60.570.440.380.430.41-0.010.370.330.40.560.41-0.321.120.30.480.190.340.30.140.240.350.160.08-0.62-0.47-0.84-0.57-1.43-0.21
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-09-302009-06-30
 us-gaap:Revenues dei:LegalEntity zions:AmegyCorporation▁▂▆█▅▃▃▄153155163166160156157158NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:Revenues dei:LegalEntity zions:CaliforniaBankTrust▁▃▄█▃▅▃▂147152153162152155151150NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:Revenues dei:LegalEntity zions:CommerceBankOfWashington▁▂▂▄▄█▂▁1314141515181413NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:Revenues dei:LegalEntity zions:NationalBankOfArizona▁▂▃█▄▃▃▄6465677368676668NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:Revenues dei:LegalEntity zions:NevadaStateBank▁▅██▄▅▂▄4649515148494748NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:Revenues dei:LegalEntity zions:OtherSegment▇▇▄█▆▅▆▁2222826151318-5NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:Revenues dei:LegalEntity zions:VectraBankColorado▃▆▆█▆▆▁▃4041414241413940NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:Revenues dei:LegalEntity zions:ZionsBank▁▆██▅█▅▇197213218218210217209214NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:Revenues us-gaap:StatementBusinessSegments us-gaap:Corporate682NA715NA709NA701NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:InterestExpense ▅▆██▇▅▄▄▃▂▂▂▁▁▁▁▁▁▂▂▂▂▃▃▃7488110115998066584736353026212122222430313131434651NA576266NA708681NA83142128NA130170124159144
us-gaap:InterestExpenseDebt ▄▄▇█▇▅▄▅▄▃▃▂▂▁▁▁▁▂▃▃▃2326414942322829272020161388101012181918NA313438NA434750NANANANANANANANANANANANANANA
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic ▄▇█▇███▇█▇▇▇▆▇▇▆▆▆▆▄▆▆▆▇▆▃▆▆▆▅▆▆▆▆▆▆▅▃▃▂▃▁▃1623528825627429029225330826024324818420619117413114714119143125148189157-631721261718717014214113616812689-96-78-136-91-257-75
 us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic dei:LegalEntity zions:CaliforniaBankTrust▁▇█▆▆▆▆▆3274847167707172NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic dei:LegalEntity zions:CommerceBankOfWashington▁▇▇▅▆█▆▄21011891297NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic dei:LegalEntity zions:NationalBankOfArizona▁▇▇█▆▇▇▅828283326292823NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic dei:LegalEntity zions:ZionsBank▁██▆▆█▇▇341021028280998992NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic us-gaap:StatementBusinessSegments us-gaap:Corporate▁▇█16235288NA274290292NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:IncomeTaxExpenseBenefit ▁▄▄▄▄▄▄▄▅█▅▅▃▄▄▄▃▃▃▁▄▃▄▄▄2526658616469567013783804569646041444055143536956NA614360NA605151NA595437NA-31-22-28-100-23
 us-gaap:IncomeTaxExpenseBenefit us-gaap:DerivativeInstrumentRisk,us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome,us-gaap:StatementEquityComponents us-gaap:InterestRateContract,us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome,us-gaap:AociIncludingPortionAttributableToNoncontrollingInterest1000000.0NA0.0-1000000.00.0NA0.00.0NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:IncomeTaxesPaidNet ▁▄▄█▁▅▄▆▁▃▆█▁▄▄▆▁▃▂▆▁▁▄▇▁15447134-265519014084128-6605210103189201581220NA321203NA679-21NA000NA028-3520-29
us-gaap:ProfitLoss ▄▇█▇███▇█▆▇▇▆▆▆▆▅▆▆▄▅▅▅▆▆▃▆▅▆▅▆▅▅▅▆▅▅▃▃▂▃▁▃141832221982132262231972381241601681391371271139010210013928195119101-4111183110571099189881087252-72-47-113-63-157-51
 us-gaap:ProfitLoss us-gaap:StatementEquityComponents us-gaap:Parent▁▇█▇███▇14183222198213226223197NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:ProfitLoss us-gaap:StatementEquityComponents us-gaap:RetainedEarnings▁▆█▇▇██▇█▄▆▆▅▅▅▄▃▄▄▁▃▃▄▄▄141832221982132262231972381231611691391371271139010210013928195119101NANANA110NANANA89NANANA52NA-47NA-60-155NA
us-gaap:ComprehensiveIncomeNetOfTax 230NA245346341NA178148110NA152230150NA113149133641199310564121128147NA101115149NA15187110NA246714NANANANANANA
us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic ▄▇█▇███▇█▆▇▇▆▆▆▆▅▆▆▄▅▅▅▆▅▃█▅▆▅▅▅▄▅▅▅▄▂▃▂▃▁▄617421418920521721518723111415215412912411690788884-175667910476-5920955883562552544652914-110-80-135-86-181-23
us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted ▁▆▇▇▇██▇█▄▆▆7171213188204215214186229113151153NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-09-302009-06-30
us-gaap:Assets █▇██▇▇▆▆▆▆▆▆▆▅▄▄▄▄▄▄▃▃▃▂▃▃▂▂▂▃▂▂▂▂▁▁▁▁▁▁▁▂▂71467691727036170065691956874666731664576648166288655646544665463632396103859642591795966958410583655755557208554585511156080560315518854904541105551153087534075289653149515315136150807510345104752147517125329852767
us-gaap:Liabilities █▇█▇▇▇▆▆▆▆▆▆▆▅▄▄▄▄▃▃▃▃▂▃▃▃▃▂▂▃▂▂▂▂▁▁▁▁▁▂▂▂▂63995618196285262466616076116859178588365883758609578035769757733556045335952016515545216250772508355010149839481364841149494495664885548044477594946347168469174650946165446124444844063443874455345726458564760347013
us-gaap:LiabilitiesAndStockholdersEquity █▇██▇▇▆▆▆▆▆▆▆▅▄▄▄▄▄▄▃▃▃▂▃▃▂▂▂▃▂▂▂▂▁▁▁▁▁▁▁▂▂71467691727036170065691956874666731664576648166288655646544665463632396103859642591795966958410583655755557208554585511156080560315518854904541105551153087534075289653149515315136150807510345104752147517125329852767
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-09-302009-06-30
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-09-302009-06-30
us-gaap:PropertyPlantAndEquipmentNet ██████▇▇▇▇▇▇▆▆▆▅▅▄▄▃▃▃▃▃▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁11441142114611331125112411111099109810941083106910471019986955925905873856844829811803785726720717706708709714715719726722721720719705707698703
us-gaap:IntangibleAssetsNetIncludingGoodwill ▁▁▁▁▁███10141014101410141014101510151015NA1016NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:DeferredTaxAssetsLiabilitiesNet ▁▂▂▂▃▅▆▅▄▃▇▇▇█▆▆▆▇▇63734367313017014912393207198231250170164180203201NANA224NANANA304NANANA405NANANA509NANANA540NANANANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-09-302009-06-30
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-09-302009-06-30
us-gaap:LongTermDebt ▆▆▄▄▄▂▃▁▁▁▁▁▁▂▂▂▂▃▃▃▄▄▄▇▇██▇█████▇▆▆▆▇▆▆▇█▆17951723124212361228724879383383383383383383534570698802817944105010891092111319332158227323042173235223372326227422831954189818791913194219191918201623241917
 us-gaap:LongTermDebt us-gaap:FairValueByFairValueHierarchyLevel us-gaap:FairValueInputsLevel2██▄▄▄▁▂17951723124212361228724879NANA383NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:LongTermDebt us-gaap:FairValueByFairValueHierarchyLevel,us-gaap:FinancialInstrument us-gaap:FairValueInputsLevel2,us-gaap:EstimateOfFairValueFairValueDisclosure██▅▅▅▁▂17051751125512481240727885NANA402NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-09-302009-06-30
us-gaap:RetainedEarningsAccumulatedDeficit ███▇▇▇▆▆▆▅▅▅▄▄▄▄▄▃▃▃▃▃▃▃▂▂▂▂▂▂▂▁▁▁▁▁▁▁▁▁▂▂▃397940093892373736033456329631392999280727002572243523212211211020311966189418231836176917111640154214731540133812901203117011101060103699493190488910171099122015021685
us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax █▆▆▆▅▄▃▃▄▅▅▅▅▅▆▆▆▅▆▆▅▅▅▅▅▄▃▃▃▂▁▁▁▁▁▂▂▂▂▂▂▂▃259434925-122-250-361-315-267-139-57-49-111-1211023-11-54-16-35-114-128-110-136-145-192-384-374-406-446-534-576-571-592-588-504-499-461-452-433-428-469-368
 us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax us-gaap:RetirementPlanType us-gaap:OtherPensionPlansDefinedBenefit▇▆▆▅▄█▁▂17629299-106228-335-289NA-114NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax us-gaap:RetirementPlanType us-gaap:OtherPensionPlansPostretirementOrSupplementalPlansDefinedBenefit█▃▄▄▂▁▁▁972841375-1-3-3NA-2NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-09-302009-06-30
us-gaap:NetCashProvidedByUsedInOperatingActivities ▄▇▄▆▁▇█▄▆▄▅▅█▄▅▂▅▄▅▃▃▄▅▂▄153351126262-4235138716327512522719538013322811222148212858811619812126NA272311210NA93260248NA215346269NA37288670747225
us-gaap:NetCashProvidedByUsedInInvestingActivities ▂█▆▅▆▃▅▆▅▅▆▆▁▃▃▆▆▄▆▅▅▃▄█▆-2125978112-80287-1967-410100-429-842-24-173-2880-1957-1456-158136-1156-271-810-413-1444-1147117575NA-240-669399NA313-567-63NA-260-65528NA753-528-1648-123984
us-gaap:NetCashProvidedByUsedInFinancingActivities ▇▄▃▄▃▇▃▃▃▅▃▃█▇▆▄▂▆▃▅▄▆▄▁▃199754220542-123171372-26576724-143-107232920081221189-6391203-967622031584154-1145-36NA150612-1523NA-471349-326NA112395-272NA-1133464652-860-1302
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-09-302009-06-30
us-gaap:NetCashProvidedByUsedInOperatingActivities ▄▇▄▆▁▇█▄▆▄▅▅█▄▅▂▅▄▅▃▃▄▅▂▄153351126262-4235138716327512522719538013322811222148212858811619812126NA272311210NA93260248NA215346269NA37288670747225
us-gaap:ProfitLoss ▄▇█▇███▇█▆▇▇▆▆▆▆▅▆▆▄▅▅▅▆▆▃▆▅▆▅▆▅▅▅▆▅▅▃▃▂▃▁▃141832221982132262231972381241601681391371271139010210013928195119101-4111183110571099189881087252-72-47-113-63-157-51
 us-gaap:ProfitLoss us-gaap:StatementEquityComponents us-gaap:Parent▁▇█▇███▇14183222198213226223197NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:ProfitLoss us-gaap:StatementEquityComponents us-gaap:RetainedEarnings▁▆█▇▇██▇█▄▆▆▅▅▅▄▃▄▄▁▃▃▄▄▄141832221982132262231972381231611691391371271139010210013928195119101NANANA110NANANA89NANANA52NA-47NA-60-155NA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-09-302009-06-30
us-gaap:NetCashProvidedByUsedInInvestingActivities ▂█▆▅▆▃▅▆▅▅▆▆▁▃▃▆▆▄▆▅▅▃▄█▆-2125978112-80287-1967-410100-429-842-24-173-2880-1957-1456-158136-1156-271-810-413-1444-1147117575NA-240-669399NA313-567-63NA-260-65528NA753-528-1648-123984
us-gaap:PaymentsToAcquirePropertyPlantAndEquipment ▂▁▂▃▁▃▃▁▂▃▃▄▅▅▅▅▃▅▃▂▂▃▁▃█28233435253936262836394450525151405138333336263576NA202615NA151715NA221920NA2517151220
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-09-302009-06-30
us-gaap:NetCashProvidedByUsedInFinancingActivities ▇▄▃▄▃▇▃▃▃▅▃▃█▇▆▄▂▆▃▅▄▆▄▁▃199754220542-123171372-26576724-143-107232920081221189-6391203-967622031584154-1145-36NA150612-1523NA-471349-326NA112395-272NA-1133464652-860-1302
us-gaap:PaymentsOfDividends █▇█▇█▇█▆▅▄▃▂▂▂▂▁▂▂▂▂▁▁▁▁▁66646961666468554940342629263022272827292324232423NA343524NA323540NA404034NA29212222NA
us-gaap:PaymentsOfDividends █▇█▇█▇█▆▅▄▃▂▂▂▂▁▂▂▂▂▁▁▁▁▁66646961666468554940342629263022272827292324232423NA343524NA323540NA404034NA29212222NA
us-gaap:PaymentsForRepurchaseOfCommonStock ▃████▇▆▄▄▄▄▂▂▂▂▁▁▁▁75276275275276250186126122115115525052455160NANANANANANANANANANANANANANANANANANANANA2NANA0
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-09-302009-06-30
us-gaap:DebtInstrumentInterestRateStatedPercentage NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA

Stock Issued During Period Shares Period Increase Decrease

Common Stock Value

Common Stock Par Or Stated Value Per Share

Common Stock Shares Issued

us-gaap:CommonStockSharesIssued



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-07-282014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value16316517017618218719219519719719920220220320320520420420420320320320217185184184184184184184184184184184184184183182177173160150136125
Percentage of CommonStockSharesIssued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Common Stock Shares Outstanding

us-gaap:CommonStockSharesOutstanding



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value163165170176182187192195197197199202202203203205204204204203203203202185184184184184184184184184184184184184183182177173160150136125
Percentage of CommonStockSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:CommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302008-12-312007-12-31
Value163165170176182187192195197197199202202203203205204204204203203203202185184184184184184184184184184184184184183182177173160150136125115107
Percentage of CommonStockSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.3100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0

Common Stock Shares Authorized

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-09-302009-06-30
Value172181189195205209210209208210204204204204202202197185185184184183183183182182182181172161151127115
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 End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-09-302009-06-30
Value164173179184192195196200201202204204203203202202196184184184183183183182182182182181172161151127115
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 End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-09-302009-06-30
Value0.041.031.231.051.11.141.110.951.160.570.750.760.630.610.570.440.380.430.41-0.010.370.330.40.560.41-0.321.130.30.480.190.340.30.140.240.350.160.08-0.62-0.47-0.84-0.57-1.43-0.21
Percentage of EarningsPerShareBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Diluted

us-gaap:EarningsPerShareDiluted



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-09-302009-06-30
Value0.040.971.170.991.041.081.040.891.090.540.720.730.610.60.570.440.380.430.41-0.010.370.330.40.560.41-0.321.120.30.480.190.340.30.140.240.350.160.08-0.62-0.47-0.84-0.57-1.43-0.21
Percentage of EarningsPerShareDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Revenues

dei:LegalEntity

us-gaap:Revenues

zions:AmegyCorporation



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value153155163166160156157158
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating24.624.024.124.323.723.824.926.1
Percentage of InterestAndDividendIncomeOperating zions:AmegyCorporation0.00.00.00.00.00.00.00.0

zions:CaliforniaBankTrust



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value147152153162152155151150
Percentage of Revenues96.198.193.997.695.099.496.294.9
Percentage of InterestAndDividendIncomeOperating23.623.522.623.722.523.623.924.8
Percentage of InterestAndDividendIncomeOperating zions:CaliforniaBankTrust0.00.00.00.00.00.00.00.0

zions:CommerceBankOfWashington



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value1314141515181413
Percentage of Revenues8.59.08.69.09.411.58.98.2
Percentage of InterestAndDividendIncomeOperating2.12.22.12.22.22.72.22.1
Percentage of InterestAndDividendIncomeOperating zions:CommerceBankOfWashington0.00.00.00.00.00.00.00.0

zions:NationalBankOfArizona



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value6465677368676668
Percentage of Revenues41.841.941.144.042.542.942.043.0
Percentage of InterestAndDividendIncomeOperating10.310.09.910.710.110.210.511.2
Percentage of InterestAndDividendIncomeOperating zions:NationalBankOfArizona0.00.00.00.00.00.00.00.0

zions:NevadaStateBank



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value4649515148494748
Percentage of Revenues30.131.631.330.730.031.429.930.4
Percentage of InterestAndDividendIncomeOperating7.47.67.57.57.17.57.47.9
Percentage of InterestAndDividendIncomeOperating zions:NevadaStateBank0.00.00.00.00.00.00.00.0

zions:OtherSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value2222826151318-5
Percentage of Revenues14.414.24.915.79.48.311.5-3.2
Percentage of InterestAndDividendIncomeOperating3.53.41.23.82.22.02.9-0.8
Percentage of InterestAndDividendIncomeOperating zions:OtherSegment0.00.00.00.00.00.00.00.0

zions:VectraBankColorado



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value4041414241413940
Percentage of Revenues26.126.525.225.325.626.324.825.3
Percentage of InterestAndDividendIncomeOperating6.46.36.16.16.16.26.26.6
Percentage of InterestAndDividendIncomeOperating zions:VectraBankColorado0.00.00.00.00.00.00.00.0

zions:ZionsBank



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value197213218218210217209214
Percentage of Revenues128.8137.4133.7131.3131.2139.1133.1135.4
Percentage of InterestAndDividendIncomeOperating31.732.932.231.931.133.133.135.3
Percentage of InterestAndDividendIncomeOperating zions:ZionsBank0.00.00.00.00.00.00.00.0

us-gaap:StatementBusinessSegments

us-gaap:Corporate



Period End2020-03-312019-09-302019-03-312018-09-30
Value682715709701
Percentage of Revenues445.8438.7443.1446.5
Percentage of InterestAndDividendIncomeOperating109.6105.6105.0111.1
Percentage of InterestAndDividendIncomeOperating us-gaap:Corporate0.00.00.00.0

Interest Expense

us-gaap:InterestExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-09-302009-06-30
Value748811011599806658473635302621212222243031313143465157626670868183142128130170124159144
Percentage of InterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating11.913.616.216.814.712.210.59.68.06.46.35.45.04.24.44.54.65.26.86.96.96.89.410.110.912.212.713.713.816.615.515.125.523.322.329.221.525.322.6

Interest Expense Debt

us-gaap:InterestExpenseDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-31
Value2326414942322829272020161388101012181918313438434750
Percentage of InterestExpenseDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating3.74.06.17.26.24.94.44.84.63.63.62.92.51.71.82.12.22.64.04.24.26.87.58.29.29.610.5

Interest Expense Long Term Debt

Income Loss From Continuing Operations Before Income Taxes Domestic

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-09-302009-06-30
Value1623528825627429029225330826024324818420619117413114714119143125148189157-631721261718717014214113616812689-96-78-136-91-257-75
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating2.636.342.537.440.644.246.341.752.346.343.644.435.741.239.135.827.831.131.14.331.927.232.440.933.6-12.936.525.635.317.633.127.527.025.330.322.716.2-16.8-13.5-23.3-15.8-40.8-11.9

dei:LegalEntity

zions:AmegyCorporation



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-3255618887738978
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic-200.023.421.234.431.825.230.530.8
Percentage of InterestAndDividendIncomeOperating-5.18.59.012.912.911.114.112.9
Percentage of InterestAndDividendIncomeOperating zions:AmegyCorporation0.00.00.00.00.00.00.00.0

zions:CaliforniaBankTrust



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value3274847167707172
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic200.031.529.227.724.524.124.328.5
Percentage of InterestAndDividendIncomeOperating5.111.412.410.49.910.711.311.9
Percentage of InterestAndDividendIncomeOperating zions:CaliforniaBankTrust0.00.00.00.00.00.00.00.0

zions:CommerceBankOfWashington



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value21011891297
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic12.54.33.83.13.34.13.12.8
Percentage of InterestAndDividendIncomeOperating0.31.51.61.21.31.81.41.2
Percentage of InterestAndDividendIncomeOperating zions:CommerceBankOfWashington0.00.00.00.00.00.00.00.0

zions:NationalBankOfArizona



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value828283326292823
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic50.011.99.712.99.510.09.69.1
Percentage of InterestAndDividendIncomeOperating1.34.34.14.83.94.44.43.8
Percentage of InterestAndDividendIncomeOperating zions:NationalBankOfArizona0.00.00.00.00.00.00.00.0

zions:NevadaStateBank



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-114141413131112
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic-6.26.04.95.54.74.53.84.7
Percentage of InterestAndDividendIncomeOperating-0.22.22.12.01.92.01.72.0
Percentage of InterestAndDividendIncomeOperating zions:NevadaStateBank0.00.00.00.00.00.00.00.0

zions:OtherSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-15-63-29-54-17-20-17-44
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic-93.8-26.8-10.1-21.1-6.2-6.9-5.8-17.4
Percentage of InterestAndDividendIncomeOperating-2.4-9.7-4.3-7.9-2.5-3.0-2.7-7.3
Percentage of InterestAndDividendIncomeOperating zions:OtherSegment0.00.00.00.00.00.00.00.0

zions:VectraBankColorado



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-121517149141213
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic-75.06.45.95.53.34.84.15.1
Percentage of InterestAndDividendIncomeOperating-1.92.32.52.01.32.11.92.1
Percentage of InterestAndDividendIncomeOperating zions:VectraBankColorado0.00.00.00.00.00.00.00.0

zions:ZionsBank



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value341021028280998992
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic212.543.435.432.029.234.130.536.4
Percentage of InterestAndDividendIncomeOperating5.515.815.112.011.915.114.115.2
Percentage of InterestAndDividendIncomeOperating zions:ZionsBank0.00.00.00.00.00.00.00.0

us-gaap:StatementBusinessSegments

us-gaap:Corporate



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value16235288274290292
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating2.636.342.540.644.246.3
Percentage of InterestAndDividendIncomeOperating us-gaap:Corporate0.00.00.00.00.00.0

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-09-302009-06-30
Value2526658616469567013783804569646041444055143536956614360605151595437-31-22-28-100-23
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating0.38.09.78.59.09.810.99.211.924.414.914.38.713.813.212.48.79.58.91.211.49.511.515.112.012.98.712.511.89.89.910.79.76.7-5.4-3.9-4.9-15.8-3.7

us-gaap:DerivativeInstrumentRisk, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:InterestRateContract, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AociIncludingPortionAttributableToNoncontrollingInterest



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-30
Value1000000.00.0-1000000.00.00.00.0
Percentage of IncomeTaxExpenseBenefit50.00.0-1.70.00.00.0
Percentage of InterestAndDividendIncomeOperating0.20.0-0.10.00.00.0
Percentage of InterestAndDividendIncomeOperating us-gaap:InterestRateContract us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AociIncludingPortionAttributableToNoncontrollingInterest0.00.00.00.00.00.0

Income Taxes Paid Net

us-gaap:IncomeTaxesPaidNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-09-302009-06-30
Value15447134-265519014084128-6605210103189201581220321203679-21000028-3520-29
Percentage of IncomeTaxesPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating0.28.36.919.6-0.39.98.114.90.27.115.122.9-1.212.010.720.8-0.06.61.920.3-0.10.412.726.5-0.06.924.40.713.21.9-4.10.00.1-0.0-0.04.8-60.80.0-4.7

Profit Loss

us-gaap:ProfitLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-09-302009-06-30
Value141832221982132262231972381241601681391371271139010210013928195119101-4111183110571099189881087252-72-47-113-63-157-51
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating2.328.332.828.931.634.535.332.540.422.128.730.127.027.425.923.419.021.622.13.120.517.720.825.821.6-8.523.616.822.811.621.317.617.116.519.613.09.5-12.6-8.2-19.4-10.9-25.0-8.1

us-gaap:StatementEquityComponents

us-gaap:Parent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value14183222198213226223197
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating2.328.332.828.931.634.535.332.5
Percentage of InterestAndDividendIncomeOperating us-gaap:Parent0.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-03-312010-09-302010-03-312009-09-30
Value1418322219821322622319723812316116913913712711390102100139281951191011108952-47-60-155
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.099.2100.6100.6100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.3100.3100.499.795.498.5
Percentage of InterestAndDividendIncomeOperating2.328.332.828.931.634.535.332.540.421.928.930.327.027.425.923.419.021.622.13.120.517.720.825.821.622.817.19.6-8.1-10.4-24.6
Percentage of InterestAndDividendIncomeOperating us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-31
Value23024534634117814811015223015011314913364119931056412112814710111514915187110246714
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating37.036.250.650.528.224.418.727.341.229.123.230.728.113.726.120.623.414.026.527.731.621.523.430.929.416.821.04.512.12.7

Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest

Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest

Net Income Loss

Net Income Loss Available To Common Stockholders Basic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-09-302009-06-30
Value617421418920521721518723111415215412912411690788884-175667910476-5920955883562552544652914-110-80-135-86-181-23
Percentage of NetIncomeLossAvailableToCommonStockholdersBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating1.026.931.627.630.433.134.130.939.220.327.327.625.024.923.818.616.618.618.5-0.216.814.517.222.616.3-12.144.311.218.27.112.110.74.98.211.85.22.7-19.2-13.8-23.2-14.9-28.8-3.7

Net Income Loss Available To Common Stockholders Diluted

us-gaap:NetIncomeLossAvailableToCommonStockholdersDiluted



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-30
Value7171213188204215214186229113151153
Percentage of NetIncomeLossAvailableToCommonStockholdersDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating1.126.431.527.530.232.833.930.738.920.127.127.4

Net Income Loss Attributable To Noncontrolling Interest

Assets

us-gaap:Assets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value7146769172703617006569195687466673166457664816628865564654466546363239610385964259179596695841058365575555720855458551115608056031551885490454110555115308753407528965314951531513615080751034510475214751712511235329852767
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Liabilities

us-gaap:Liabilities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value6399561819628526246661607611685917858836588375860957803576975773355604533595201651554521625077250835501014983948136484114949449566488554804447759494634716846917465094616544612444484406344387445534572645856454124760347013
Percentage of Liabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets89.589.489.389.289.089.088.788.588.588.488.288.288.287.987.487.287.187.486.987.187.087.186.887.888.388.588.587.588.389.188.987.887.986.986.686.586.787.087.387.788.788.889.389.1

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value7146769172703617006569195687466673166457664816628865564654466546363239610385964259179596695841058365575555720855458551115608056031551885490454110555115308753407528965314951531513615080751034510475214751712511235329852767
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Stockholders Equity

Land

Property Plant And Equipment Gross

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value11441142114611331125112411111099109810941083106910471019986955925905873856844829811803785726720717706708709714715719726722721720719705707710698703
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.61.71.61.61.61.61.71.71.71.71.71.61.61.61.61.61.61.51.51.51.51.51.51.51.41.31.31.31.31.31.31.31.41.41.41.41.41.41.41.41.41.41.31.3

Investments In Affiliates Subsidiaries Associates And Joint Ventures

Goodwill

Intangible Assets Net Excluding Goodwill

Finite Lived Intangible Assets Net

Intangible Assets Net Including Goodwill

us-gaap:IntangibleAssetsNetIncludingGoodwill



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value101410141014101410141015101510151016
Percentage of IntangibleAssetsNetIncludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.41.51.41.41.51.51.51.51.5

Deferred Tax Assets Liabilities Net

us-gaap:DeferredTaxAssetsLiabilitiesNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-312013-12-312012-12-312011-12-312010-12-31
Value63734367313017014912393207198231250170164180203201224304405509540
Percentage of DeferredTaxAssetsLiabilitiesNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.10.00.10.10.20.30.20.20.10.30.30.40.40.30.30.30.30.30.40.50.71.01.1

Long Term Debt

us-gaap:LongTermDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value179517231242123612287248793833833833833833835345706988028179441050108910921113193321582273230421732352233723262274228319541898187919131942191919182016201723241917
Percentage of LongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.52.51.81.81.81.11.30.60.60.60.60.60.60.80.91.21.41.41.61.81.91.92.03.53.84.14.24.04.34.24.44.34.33.73.73.73.83.83.83.73.93.94.43.6

us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel2



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value17951723124212361228724879383
Percentage of LongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.52.51.81.81.81.11.30.6
Percentage of Assets us-gaap:FairValueInputsLevel20.00.00.00.00.00.00.00.0

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument

us-gaap:FairValueInputsLevel2, us-gaap:EstimateOfFairValueFairValueDisclosure



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value17051751125512481240727885402
Percentage of LongTermDebt95.0101.6101.0101.0101.0100.4100.7105.0
Percentage of Assets2.42.51.81.81.81.11.30.6
Percentage of Assets us-gaap:FairValueInputsLevel2 us-gaap:EstimateOfFairValueFairValueDisclosure0.00.00.00.00.00.00.00.0

Minority Interest

Stockholders Equity

Common Stock Value

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value3979400938923737360334563296313929992807270025722435232122112110203119661894182318361769171116401542147315401338129012031170111010601036994931904889101710991220132415021685
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets5.65.85.55.35.25.04.94.74.54.24.13.93.73.73.63.53.43.33.23.13.23.13.13.02.72.62.82.42.42.22.22.12.02.01.91.81.81.72.02.12.42.62.83.2

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302008-12-31
Value259434925-122-250-361-315-267-139-57-49-111-1211023-11-54-16-35-114-128-110-136-145-192-384-374-406-446-534-576-571-592-588-504-499-461-452-433-428-436-469-368-98
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 Assets0.40.10.10.0-0.2-0.4-0.5-0.5-0.4-0.2-0.1-0.1-0.2-0.20.00.0-0.0-0.1-0.0-0.1-0.2-0.2-0.2-0.2-0.3-0.3-0.7-0.7-0.8-0.8-1.0-1.1-1.1-1.1-1.1-1.0-1.0-0.9-0.9-0.8-0.8-0.9-0.9-0.70.0

us-gaap:RetirementPlanType

us-gaap:OtherPensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value17629299-106228-335-289-114
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax68.067.459.236.086.9-91.292.891.782.0
Percentage of Assets0.20.00.00.0-0.20.3-0.5-0.4-0.2
Percentage of Assets us-gaap:OtherPensionPlansDefinedBenefit0.00.00.00.00.00.00.00.00.0

us-gaap:OtherPensionPlansPostretirementOrSupplementalPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value972841375-1-3-3-2
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax37.565.183.7148.0-4.10.40.81.01.4
Percentage of Assets0.10.00.10.10.0-0.0-0.0-0.0-0.0
Percentage of Assets us-gaap:OtherPensionPlansPostretirementOrSupplementalPlansDefinedBenefit0.00.00.00.00.00.00.00.00.0

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302017-12-31
Value-14-14-21-21-21-21-23-23-23
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax-5.4-32.6-42.9-84.017.28.46.47.316.5
Percentage of Assets-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0
Percentage of Assets us-gaap:PensionPlansDefinedBenefit0.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-09-302009-06-30
Value153351126262-42351387163275125227195380133228112221482128588116198121262723112109326024821534626937288670747225
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating24.654.318.638.3-6.253.561.326.946.722.240.834.973.826.646.52.446.931.446.618.719.825.343.12.727.157.663.143.418.250.347.438.962.048.764.015.1115.6118.335.4

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-09-302009-06-30
Value-2125978112-80287-1967-410100-429-842-24-173-2880-1957-1456-158136-1156-271-810-413-1444-1147117575-240-669399313-567-63-260-65528753-528-1648-123984
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating-341.6151.216.5-117.312.9-299.8-65.016.5-72.8-149.8-4.3-31.0-559.2-390.0-296.8-32.628.7-244.2-59.5-177.9-92.1-312.6-249.4253.816.2-50.9-135.682.560.9-109.6-12.2-47.0-117.45.2129.4-90.6-284.1-19.6154.4

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-09-302009-06-30
Value199754220542-123171372-26576724-143-107232920081221189-6391203-967622031584154-1145-36150612-1523-471349-326112395-272-1133464652-860-1302
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating321.183.83.079.2-18.2261.111.4-43.712.9128.8-25.7-19.2452.2400.2248.938.9-134.6254.1-21.2167.545.3343.033.5-247.3-7.731.8124.1-314.2-91.567.5-62.320.370.8-49.4-194.879.5112.5-136.2-204.3

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-09-302009-06-30
Value153351126262-42351387163275125227195380133228112221482128588116198121262723112109326024821534626937288670747225
Percentage of NetCashProvidedByUsedInOperatingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating24.654.318.638.3-6.253.561.326.946.722.240.834.973.826.646.52.446.931.446.618.719.825.343.12.727.157.663.143.418.250.347.438.962.048.764.015.1115.6118.335.4

Net Income Loss

Profit Loss

us-gaap:ProfitLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-09-302009-06-30
Value141832221982132262231972381241601681391371271139010210013928195119101-4111183110571099189881087252-72-47-113-63-157-51
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating2.328.332.828.931.634.535.332.540.422.128.730.127.027.425.923.419.021.622.13.120.517.720.825.821.6-8.523.616.822.811.621.317.617.116.519.613.09.5-12.6-8.2-19.4-10.9-25.0-8.1

us-gaap:StatementEquityComponents

us-gaap:Parent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value14183222198213226223197
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating2.328.332.828.931.634.535.332.5
Percentage of InterestAndDividendIncomeOperating us-gaap:Parent0.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-03-312010-09-302010-03-312009-09-30
Value1418322219821322622319723812316116913913712711390102100139281951191011108952-47-60-155
Percentage of ProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.099.2100.6100.6100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.3100.3100.499.795.498.5
Percentage of InterestAndDividendIncomeOperating2.328.332.828.931.634.535.332.540.421.928.930.327.027.425.923.419.021.622.13.120.517.720.825.821.622.817.19.6-8.1-10.4-24.6
Percentage of InterestAndDividendIncomeOperating us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-09-302009-06-30
Value-2125978112-80287-1967-410100-429-842-24-173-2880-1957-1456-158136-1156-271-810-413-1444-1147117575-240-669399313-567-63-260-65528753-528-1648-123984
Percentage of NetCashProvidedByUsedInInvestingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating-341.6151.216.5-117.312.9-299.8-65.016.5-72.8-149.8-4.3-31.0-559.2-390.0-296.8-32.628.7-244.2-59.5-177.9-92.1-312.6-249.4253.816.2-50.9-135.682.560.9-109.6-12.2-47.0-117.45.2129.4-90.6-284.1-19.6154.4

Payments To Acquire Property Plant And Equipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-09-302009-06-30
Value282334352539362628363944505251514051383333362635762026151517152219202517151220
Percentage of PaymentsToAcquirePropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Payments To Acquire Investments

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-09-302009-06-30
Value199754220542-123171372-26576724-143-107232920081221189-6391203-967622031584154-1145-36150612-1523-471349-326112395-272-1133464652-860-1302
Percentage of NetCashProvidedByUsedInFinancingActivities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of InterestAndDividendIncomeOperating321.183.83.079.2-18.2261.111.4-43.712.9128.8-25.7-19.2452.2400.2248.938.9-134.6254.1-21.2167.545.3343.033.5-247.3-7.731.8124.1-314.2-91.567.5-62.320.370.8-49.4-194.879.5112.5-136.2-204.3

Proceeds From Issuance Of Long Term Debt

Repayments Of Long Term Debt

Payments Of Dividends

us-gaap:PaymentsOfDividends



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-09-30
Value6664696166646855494034262926302227282729232423242334352432354040403429212222
Percentage of PaymentsOfDividends100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Payments Of Dividends

us-gaap:PaymentsOfDividends



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-09-30
Value6664696166646855494034262926302227282729232423242334352432354040403429212222
Percentage of PaymentsOfDividends100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Payments For Repurchase Of Common Stock

us-gaap:PaymentsForRepurchaseOfCommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302010-06-302009-06-30
Value7527627527527625018612612211511552505245516020
Percentage of PaymentsForRepurchaseOfCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0

Repayments Of Long Term Debt

Debt Instrument Interest Rate Stated Percentage

us-gaap:DebtInstrumentInterestRateStatedPercentage



Period End2023-09-152018-11-152013-10-312013-09-12
Value0.0390.0420.0570.07
Percentage of DebtInstrumentInterestRateStatedPercentage100.0100.0100.0100.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.00.00.0

Effective Income Tax Rate Continuing Operations

us-gaap:EffectiveIncomeTaxRateContinuingOperations



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-30
Value0.1250.2290.2270.2230.2360.2210.2270.3420.3230.2450.3370.3460.3140.28760.2830.3570.3564
Percentage of EffectiveIncomeTaxRateContinuingOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

Share Based Compensation

us-gaap:ShareBasedCompensation



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312010-06-302009-06-30
Value134541444513445124651167
Percentage of ShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Liabilities

Deferred Tax Assets Net

Unrecognized Tax Benefits

Deferred Tax Assets Valuation Allowance

Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset



Period End2020-03-312019-12-312019-09-302019-06-30
Value211218231232
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0

Cash And Cash Equivalents Period Increase Decrease

Proceeds From Repayments Of Short Term Debt

us-gaap:ProceedsFromRepaymentsOfShortTermDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-09-302009-06-30
Value17124674-14451080-7091873-377-709-10852-7182052311-28884538-114744523-4052-66-21-6017-70-25-392318-168-34-19080-17511229-360-400
Percentage of ProceedsFromRepaymentsOfShortTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AdvertisingExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-09-302009-06-30
Value326556875566555555666566665576565655645
Percentage of AdvertisingExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AllowanceForLoanAndLeaseLossRecoveryOfBadDebts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-30
Value6101091221182521151728111023191132111937-109151712-14-29172030
Percentage of AllowanceForLoanAndLeaseLossRecoveryOfBadDebts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:CommercialPortfolioSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-30
Value467661812201810121866141471641320-668106-6-1371211
Percentage of AllowanceForLoanAndLeaseLossRecoveryOfBadDebts66.760.070.066.750.085.766.780.085.766.770.664.354.560.561.974.259.851.440.168.755.661.057.261.453.143.644.641.759.536.4

us-gaap:CommercialRealEstatePortfolioSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-30
Value02103133222821622134314-21332-2-12536
Percentage of AllowanceForLoanAndLeaseLossRecoveryOfBadDebts0.020.010.00.025.04.816.712.09.513.311.828.618.216.929.210.625.342.137.315.438.119.321.517.620.221.141.430.116.421.8

us-gaap:ConsumerPortfolioSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-30
Value222332321332322212232-19322-3-3333
Percentage of AllowanceForLoanAndLeaseLossRecoveryOfBadDebts33.320.020.033.325.09.516.78.04.820.017.67.127.322.58.815.314.86.522.715.96.317.719.517.117.122.010.622.316.112.9

us-gaap:AllowanceForLoanAndLeaseLossesAdjustmentsNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-31
Value7221140-8-1-12-5-12-8-7-46-26-29-38-36-13-31-1116-17-10-6-7-8-5-17-38-43-54-101-112-141
Percentage of AllowanceForLoanAndLeaseLossesAdjustmentsNet100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:CommercialPortfolioSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-30
Value618-1132-10-4-10-2-10-4-13-45-24-33-32-36-17-32-104-19-9-4-2-5-5-10-14-20
Percentage of AllowanceForLoanAndLeaseLossesAdjustmentsNet85.781.8-100.092.90.0125.0400.083.340.083.350.0185.797.891.8111.184.499.6130.7104.190.927.6112.888.571.728.861.095.160.237.447.4

us-gaap:CommercialRealEstatePortfolioSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-30
Value01-10-2-12-32-1-27105-5253013100-5-26-1-16-16
Percentage of AllowanceForLoanAndLeaseLossesAdjustmentsNet0.04.5-100.00.00.012.5-200.025.0-40.08.325.0-100.0-2.21.5-19.615.2-5.6-38.2-9.97.979.9-11.6-0.1-1.066.431.6-107.210.843.937.4

us-gaap:ConsumerPortfolioSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-30
Value13310311-5-1-2-1-2-1-20-20-10-1-10-10-2-5-6-8-13
Percentage of AllowanceForLoanAndLeaseLossesAdjustmentsNet14.313.6300.07.10.0-37.5-100.0-8.3100.08.325.014.34.36.68.50.45.97.55.81.1-7.55.80.321.211.627.9105.533.721.130.9

us-gaap:AllowanceForLoanAndLeaseLossesWriteOffs



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-31
Value13321123-12-13-17-132627253557375357484542312035262320223535587380129142167
Percentage of AllowanceForLoanAndLeaseLossesWriteOffs100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:CommercialPortfolioSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-30
Value1024619-8-8-8-10202016315131484643333623153318159111818-26-31
Percentage of AllowanceForLoanAndLeaseLossesWriteOffs76.975.054.582.666.761.547.176.976.974.164.088.689.582.889.380.989.974.387.376.779.094.770.264.143.950.252.751.0-45.0-42.9

us-gaap:CommercialRealEstatePortfolioSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-30
Value0300-10-5003411217081301327567-20-22
Percentage of AllowanceForLoanAndLeaseLossesWriteOffs0.09.40.00.08.3-0.029.4-0.00.011.116.02.91.86.02.013.62.018.92.512.73.13.312.512.737.825.117.420.4-34.5-31.0

us-gaap:ConsumerPortfolioSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-30
Value3554-3-5-4-364535443334334343599-11-17
Percentage of AllowanceForLoanAndLeaseLossesWriteOffs23.115.645.517.425.038.523.523.123.114.820.08.68.811.28.75.58.16.810.210.617.911.611.618.215.024.225.928.0-19.4-23.5

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:RestrictedStockUnitsRSU



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-30
Value011111
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount100.0100.0100.0100.0100.0100.0

zions:StockOptions



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-30
Value766000.0596000.0492000.0327000.0170000.0194000.0
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount122.244.234.023.011.411.4

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect



Period End2020-03-312019-03-31
Value25-78
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0

us-gaap:CommonStockDividendsPerShareDeclared



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-31
Value0.340.340.30.30.30.240.20.120000000000000020.080.08
Percentage of CommonStockDividendsPerShareDeclared100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtAndEquitySecuritiesGainLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value-632-312-11015
Percentage of DebtAndEquitySecuritiesGainLoss100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0

us-gaap:DeferredIncomeTaxExpenseBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-09-302009-06-30
Value-460-5-12154-6-1113150-4-51301-6-421-10-44332-58785-716019413353-21-15-36-5059
Percentage of DeferredIncomeTaxExpenseBenefit100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanAmortizationOfGainsLosses

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
Value01-1-1-100-108-1-1-111-1-2
Percentage of DefinedBenefitPlanAmortizationOfGainsLosses0.0100.0100.0100.0100.00.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0

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
Value232222333-20333-2033
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: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
Value1111121111222222
Percentage of DefinedBenefitPlanInterestCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanNetPeriodicBenefitCost

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
Value0-3000-1-1-1-10111031
Percentage of DefinedBenefitPlanNetPeriodicBenefitCost0.0100.00.00.00.0100.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0

us-gaap:RetirementPlanType

us-gaap:DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1

us-gaap:PensionPlansDefinedBenefit



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-09-302016-06-30
Value-1000-10-11-1-1-1-30
Percentage of DefinedBenefitPlanRecognizedNetGainLossDueToSettlements1100.00.00.00.0100.00.0100.0100.0100.0100.0100.0100.00.0

us-gaap:DepreciationAndAmortization



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-09-30
Value45455049445249494348474737-124945404140353431333132424546476257521058965964687
Percentage of DepreciationAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet

us-gaap:InterestRateFloor, us-gaap:CashFlowHedging, us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value331-10000
Percentage of DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet100.0100.0100.0100.00.00.00.00.0

us-gaap:InterestRateSwap, us-gaap:CashFlowHedging, us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value1-1-2-1-231-1
Percentage of DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet33.3-33.3-200.0100.00.00.00.00.0

us-gaap:HedgingDesignation

us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-31
Value42-1-22-31-102222321100000012357913
Percentage of DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet133.366.7-100.0200.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:DistributedEarnings



Period 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
Value575659545656584739322416
Percentage of DistributedEarnings100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Dividends



Period 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
Value646667636466665747423230
Percentage of Dividends100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:DividendsCommonStock

us-gaap:Parent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-56395-60-54-56347-58-47
Percentage of DividendsCommonStock100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RetainedEarnings



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-03-312010-09-302010-03-312009-09-30
Value-56395-60-545657-58-4740312617151616121212121288877111111
Percentage of DividendsCommonStock100.0100.0100.0100.0-100.016.4100.0100.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:StatementEquityComponents

us-gaap:DividendsPreferredStock

us-gaap:Parent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value8981079810
Percentage of DividendsPreferredStock100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RetainedEarnings



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-312011-03-312010-09-302010-03-312009-09-30
Value898107981071071310121013111416151615161525226438332626
Percentage of DividendsPreferredStock100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:EquipmentExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-09-302009-06-30
Value323434353231303233343232323329303231303129302827272626262727262626252525242524
Percentage of EquipmentExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-30
Value15-90000
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1100.0100.00.00.00.00.0

us-gaap:FairValueByAssetClass

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases

us-gaap:PrivateEquityFunds



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-30
Value15104321526578342487584712202413
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ServicingContracts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value0000000000000000000000002
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.013.18.62.92.93.44.112.05.3153.2

us-gaap:FairValueByAssetClass

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales

us-gaap:PrivateEquityFunds



Period End2020-03-312019-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-30
Value250003010019000000192-9
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueOptionChangesInFairValueGainLoss1



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-31
Value0-1-9-4-9-1-5-1-6-2-6-15-15-8-4-6-4-1-4-4-3-6-7-7-11
Percentage of FairValueOptionChangesInFairValueGainLoss10.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancialInstrument

us-gaap:PrivateEquityFunds



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value0.00.0-1000000.00.00.00.00.00.00.00.00.0
Percentage of FairValueOptionChangesInFairValueGainLoss10.00.0100.0-0.0-0.00.0-0.0-0.0-0.00.0-0.0

zions:ImpairedLoans



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value090-9-42-9-1
Percentage of FairValueOptionChangesInFairValueGainLoss10.00.0-0.0100.0100.00.0100.0100.0

us-gaap:FederalDepositInsuranceCorporationPremiumExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-09-302009-06-30
Value567666181413131513121111979888888791091110101215242526241942
Percentage of FederalDepositInsuranceCorporationPremiumExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-30
Value1-2145038231318-361960022020005128
Percentage of FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:CommercialLoan



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-30
Value1-2133015231316-561861011010003005
Percentage of FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1100.0100.0100.075.060.00.033.362.5100.0100.0100.0100.088.9136.799.398.397.6175.91.556.442.5151.277.484.20.074.856.812.24.666.6

us-gaap:CommercialRealEstate



Period End2020-03-312019-09-302019-03-312018-09-302018-06-302018-03-312017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-30
Value002220200000100000122
Percentage of FinancingReceivableModificationsSubsequentDefaultRecordedInvestment10.00.040.066.725.00.011.10.70.00.00.038.753.00.00.025.70.00.081.495.433.4

zions:CommercialAndIndustrial



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value1-2133015
Percentage of FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1100.0100.0100.075.060.00.033.362.5

zions:Term



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value00002022
Percentage of FinancingReceivableModificationsSubsequentDefaultRecordedInvestment10.0-0.00.00.040.00.066.725.0

us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, zions:FinancialReceivables

us-gaap:CommercialLoan, zions:Nonaccruing



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value1-2133015
Percentage of FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1100.0100.0100.075.060.00.033.362.5

us-gaap:CommercialRealEstate, zions:Accruing



Period End2020-03-312019-09-302019-03-312018-09-30
Value0002
Percentage of FinancingReceivableModificationsSubsequentDefaultRecordedInvestment10.00.00.066.7

us-gaap:CommercialRealEstate, zions:Nonaccruing



Period End2020-03-312019-09-302019-03-312018-09-30
Value0020
Percentage of FinancingReceivableModificationsSubsequentDefaultRecordedInvestment10.00.040.00.0

zions:CommercialAndIndustrial, zions:Nonaccruing



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value1-2133015
Percentage of FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1100.0100.0100.075.060.00.033.362.5

zions:Term, zions:Accruing



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value0000-220
Percentage of FinancingReceivableModificationsSubsequentDefaultRecordedInvestment10.00.00.00.00.066.70.0

zions:Term, zions:Nonaccruing



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value0002202
Percentage of FinancingReceivableModificationsSubsequentDefaultRecordedInvestment10.00.00.040.00.00.025.0

zions:FinancialReceivables

zions:Accruing



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value00000-220
Percentage of FinancingReceivableModificationsSubsequentDefaultRecordedInvestment10.0-0.00.00.00.00.066.70.0

zions:Nonaccruing



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value1-2145218
Percentage of FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1100.0100.0100.0100.0100.00.033.3100.0

us-gaap:DerivativeInstrumentRisk, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:GainLossOnDerivativeInstrumentsNetPretax

us-gaap:InterestRateContract, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AociIncludingPortionAttributableToNoncontrollingInterest



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-30
Value3-1-2-1-1-1
Percentage of GainLossOnDerivativeInstrumentsNetPretax100.0100.0100.0100.0100.0100.0

us-gaap:GainLossOnInvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-30
Value-632-312-1101525-382003-1333-2-13731-4-3-32-104-9-2-16
Percentage of GainLossOnInvestments100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

us-gaap:GainsLossesOnSalesOfOtherRealEstate

zions:NevadaStateBank



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value0.00.01000000.00.00.00.00.00.0
Percentage of GainsLossesOnSalesOfOtherRealEstate0.00.0100.00.00.00.00.00.0

zions:OtherSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value0.00.00.00.00.0-1000000.00.00.0
Percentage of GainsLossesOnSalesOfOtherRealEstate0.00.00.00.00.00.00.00.0

zions:ZionsBank



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value0.00.01000000.00.01000000.01000000.00.00.0
Percentage of GainsLossesOnSalesOfOtherRealEstate0.00.0100.00.00.00.00.00.0

us-gaap:FinancialInstrument

zions:OtherRealEstateOwnedProperties



Period End2020-03-312019-06-302019-03-312018-06-30
Value1000000.00.01000000.00.0
Percentage of GainsLossesOnSalesOfOtherRealEstate0.00.00.00.0

us-gaap:StatementBusinessSegments

us-gaap:Corporate



Period End2020-03-312019-09-302019-03-312018-09-30
Value0210
Percentage of GainsLossesOnSalesOfOtherRealEstate0.0200.00.00.0

us-gaap:IncreaseDecreaseInDeposits



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-09-302009-06-30
Value4339451807-203435315204618347522-278-10992412386576406-4861453-168132751581594-861170653525-164261261252171598-342-1053-81257-1065-871
Percentage of IncreaseDecreaseInDeposits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInFairValueOfHedgedItemInInterestRateFairValueHedge1



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-7114-1-12-6-4-10000
Percentage of IncreaseDecreaseInFairValueOfHedgedItemInInterestRateFairValueHedge1100.0100.0100.0100.0100.0100.0100.00.00.00.00.0

us-gaap:IncreaseDecreaseInLoansHeldForSale



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-09-30
Value18738381-41-2133-2618-53-36-101235-389-2323-37-4439-41-49-33-8977-50-20-21-41-282314-24-50
Percentage of IncreaseDecreaseInLoansHeldForSale100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOperatingLiabilities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-09-30
Value-13527-30-43-3120814-3484-6342-2145314417821-6125663319-77282-48-10-11-183329-36371336-104
Percentage of IncreaseDecreaseInOperatingLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherOperatingAssets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-09-302009-06-30
Value12033-20967013-79100-488042-12-21-2124225-765-31-326542-416-3-70-121-51-21-38-5084-41-18-100122-103-32389
Percentage of IncreaseDecreaseInOtherOperatingAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInTradingSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-09-302009-06-30
Value-22-98132-168210-70-3163-492-522-766-105217-2502115-102111-10-61-21-1-57-423527-113
Percentage of IncreaseDecreaseInTradingSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestAndDividendIncomeOperating



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-09-302009-06-30
Value622647677684675656631606589562557558515501490486474473456455448461460463467490473493484498515518523539554558552574581583580631637
Percentage of InterestAndDividendIncomeOperating100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestAndFeeIncomeLoansAndLeases



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-09-302009-06-30
Value532558581581570554537514497477468469433438436433420429419420415431430433434442460453479478486520523518543541547586583
Percentage of InterestAndFeeIncomeLoansAndLeases100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestExpenseDeposits



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-31
Value51626966574838292016151413121211111212121212121212141515192023313436465256
Percentage of InterestExpenseDeposits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestIncomeExpenseAfterProvisionForLoanLoss



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-09-302009-06-30
Value290557548572569576543582537517521466483450430410426407423418418471470417421452447446421426456414363267184189-93-268
Percentage of InterestIncomeExpenseAfterProvisionForLoanLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

zions:AmegyCorporation



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-30
Value14108140141144133
Percentage of InterestIncomeExpenseAfterProvisionForLoanLoss4.819.425.524.725.024.5

zions:CaliforniaBankTrust



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-30
Value84136131130129129
Percentage of InterestIncomeExpenseAfterProvisionForLoanLoss29.024.423.922.722.423.8

zions:CommerceBankOfWashington



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-30
Value71512141311
Percentage of InterestIncomeExpenseAfterProvisionForLoanLoss2.42.72.22.42.32.0

zions:NationalBankOfArizona



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-30
Value335760555751
Percentage of InterestIncomeExpenseAfterProvisionForLoanLoss11.410.210.99.69.99.4

zions:NevadaStateBank



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-30
Value233840393638
Percentage of InterestIncomeExpenseAfterProvisionForLoanLoss7.96.87.36.86.27.0

zions:OtherSegment



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-30
Value16-10-33-3-4-29
Percentage of InterestIncomeExpenseAfterProvisionForLoanLoss5.5-1.8-6.0-0.5-0.7-5.3

zions:VectraBankColorado



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-30
Value73735313232
Percentage of InterestIncomeExpenseAfterProvisionForLoanLoss2.46.66.45.45.65.9

zions:ZionsBank



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-30
Value106176163165169171
Percentage of InterestIncomeExpenseAfterProvisionForLoanLoss36.631.629.728.829.331.5

us-gaap:StatementBusinessSegments

us-gaap:Corporate



Period End2020-03-312019-09-302019-03-312018-09-30
Value290557572576
Percentage of InterestIncomeExpenseAfterProvisionForLoanLoss100.0100.0100.0100.0

us-gaap:InterestIncomeExpenseNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-09-302009-06-30
Value548559567569576576565548542526522528489480469464452448425423417430416416416432415430418429444431442461470416423406451413455472493
Percentage of InterestIncomeExpenseNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

zions:AmegyCorporation



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value117122126132126125126127
Percentage of InterestIncomeExpenseNet21.421.822.223.221.921.722.323.2

zions:CaliforniaBankTrust



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value122127130140133132132131
Percentage of InterestIncomeExpenseNet22.322.722.924.623.122.923.423.9

zions:CommerceBankOfWashington



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value1213131414171312
Percentage of InterestIncomeExpenseNet2.22.32.32.52.43.02.32.2

zions:NationalBankOfArizona



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value5354576258575658
Percentage of InterestIncomeExpenseNet9.79.710.110.910.19.99.910.6

zions:NevadaStateBank



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value3538394038383738
Percentage of InterestIncomeExpenseNet6.46.86.97.06.66.66.56.9

zions:OtherSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value18-4-9-34-4-5-3-28
Percentage of InterestIncomeExpenseNet3.3-0.7-1.6-6.0-0.7-0.9-0.5-5.1

zions:VectraBankColorado



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value3234343635353334
Percentage of InterestIncomeExpenseNet5.86.16.06.36.16.15.86.2

zions:ZionsBank



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value159175177179176177171176
Percentage of InterestIncomeExpenseNet29.031.331.231.530.630.730.332.1

us-gaap:StatementBusinessSegments

us-gaap:Corporate



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value548559567576576565
Percentage of InterestIncomeExpenseNet100.0100.0100.0100.0100.0100.0

us-gaap:InterestIncomeMoneyMarketDeposits



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-09-302009-06-30
Value868899876555444576655554565555433232111
Percentage of InterestIncomeMoneyMarketDeposits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestPaid



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-09-302009-06-30
Value88861161049580575544392730222218241828222822294140404541626544627151919289102139164
Percentage of InterestPaid100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InvestmentIncomeInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value8283889596938685868084847859494747373028272424242825242725
Percentage of InvestmentIncomeInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InvestmentType

us-gaap:AvailableforsaleSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value7576818789867977797478787152424141312422201717172017161917
Percentage of InvestmentIncomeInterest91.591.692.091.692.792.591.990.691.992.592.992.991.087.986.786.487.883.479.877.574.372.172.171.074.668.368.070.168.4

us-gaap:HeldtomaturitySecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value54666576665575555555666667777
Percentage of InvestmentIncomeInterest6.14.86.86.36.25.48.17.17.07.56.06.09.010.011.912.011.315.118.720.423.525.826.326.623.730.231.128.930.8

us-gaap:OtherTrading



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value23121202101
Percentage of InvestmentIncomeInterest2.43.61.12.11.02.20.02.41.20.01.2

us-gaap:InvestmentType, zions:TaxableVSNontaxableIncome

us-gaap:AvailableforsaleSecurities, zions:Nontaxable



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value66766767
Percentage of InvestmentIncomeInterest7.37.28.06.36.27.57.08.2

us-gaap:AvailableforsaleSecurities, zions:Taxable



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value6970748183797370
Percentage of InvestmentIncomeInterest84.184.384.185.386.584.984.982.4

us-gaap:HeldtomaturitySecurities, zions:Nontaxable



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value32344343
Percentage of InvestmentIncomeInterest3.72.43.44.24.23.24.73.5

us-gaap:HeldtomaturitySecurities, zions:Taxable



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value22322233
Percentage of InvestmentIncomeInterest2.42.43.42.12.12.23.53.5

us-gaap:OtherTrading, zions:Nontaxable



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value22121102
Percentage of InvestmentIncomeInterest2.42.41.12.11.01.10.02.4

us-gaap:OtherTrading, zions:Taxable



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value0.01000000.00.00.00.01000000.00.00.0
Percentage of InvestmentIncomeInterest0.01.20.00.00.01.10.00.0

zions:TaxableVSNontaxableIncome

zions:Nontaxable



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value1110111211111012
Percentage of InvestmentIncomeInterest13.412.012.512.611.511.811.614.1

zions:Taxable



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value7173778385827673
Percentage of InvestmentIncomeInterest86.688.087.587.488.588.288.485.9

us-gaap:InvestmentIncomeNonoperating



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-09-302009-06-30
Value3164999111111991012496516117712111211219917888722
Percentage of InvestmentIncomeNonoperating100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LaborAndRelatedExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-09-302009-06-30
Value274306273274287270264266269255253242262240242241258236242251243238245238233229227229220220224216222215207205204205202
Percentage of LaborAndRelatedExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LeaseCost



Period End2020-03-312019-09-302019-06-302019-03-31
Value24262525
Percentage of LeaseCost100.0100.0100.0100.0

us-gaap:LoansAndLeasesReceivableGainLossOnSalesNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-30
Value13583223434144265354443358887
Percentage of LoansAndLeasesReceivableGainLossOnSalesNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NoninterestExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-09-302009-06-30
Value408472415424430419420428412417413405414404403381395402396404397422438406398494370451397407394401392425409416408443456430389434419
Percentage of NoninterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

zions:AmegyCorporation



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value8286848688868686
Percentage of NoninterestExpense20.118.220.220.320.520.520.520.1

zions:CaliforniaBankTrust



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value7777758282787776
Percentage of NoninterestExpense18.916.318.119.319.118.618.317.8

zions:CommerceBankOfWashington



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value65556655
Percentage of NoninterestExpense1.51.11.21.21.41.41.21.2

zions:NationalBankOfArizona



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value3640393839383938
Percentage of NoninterestExpense8.88.59.49.09.19.19.38.9

zions:NevadaStateBank



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value3536353736363536
Percentage of NoninterestExpense8.67.68.48.78.48.68.38.4

zions:OtherSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value3582362933353438
Percentage of NoninterestExpense8.617.48.76.87.78.48.18.9

zions:VectraBankColorado



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value2726272728272625
Percentage of NoninterestExpense6.65.56.56.46.56.46.25.8

zions:ZionsBank



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value110120114120118114118117
Percentage of NoninterestExpense27.025.427.528.327.427.228.127.3

us-gaap:StatementBusinessSegments

us-gaap:Corporate



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value408472415430420420
Percentage of NoninterestExpense100.0100.0100.0100.0100.2100.0

us-gaap:NoninterestIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-09-302009-06-30
Value1341521461321321401361381381401391321321281441251161241300121129116124138122125121119123106121128134110109107270612
Percentage of NoninterestIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

zions:AmegyCorporation



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value3633373434313131
Percentage of NoninterestIncome26.921.725.325.825.822.122.822.5

zions:CaliforniaBankTrust



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value2525232219231919
Percentage of NoninterestIncome18.716.415.816.714.416.414.013.8

zions:NationalBankOfArizona



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value1111101110101010
Percentage of NoninterestIncome8.27.26.88.37.67.17.47.2

zions:NevadaStateBank



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value1111111110111010
Percentage of NoninterestIncome8.27.27.58.37.67.97.47.2

zions:OtherSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value42617819192123
Percentage of NoninterestIncome3.017.111.66.114.413.615.416.7

zions:VectraBankColorado



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value87766666
Percentage of NoninterestIncome6.04.64.84.54.54.34.44.3

zions:ZionsBank



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value3838403933393838
Percentage of NoninterestIncome28.425.027.429.525.027.927.927.5

us-gaap:StatementBusinessSegments

us-gaap:Corporate



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value134152146132140136
Percentage of NoninterestIncome100.0100.0100.0100.0100.0100.0

dei:LegalEntity

us-gaap:NoninterestIncomeOtherOperatingIncome

zions:AmegyCorporation



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-30
Value363734343131
Percentage of NoninterestIncomeOtherOperatingIncome100.0100.0100.0100.0100.0100.0

zions:CaliforniaBankTrust



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-30
Value252322191919
Percentage of NoninterestIncomeOtherOperatingIncome69.462.264.755.961.361.3

zions:NationalBankOfArizona



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-30
Value111011101010
Percentage of NoninterestIncomeOtherOperatingIncome30.627.032.429.432.332.3

zions:NevadaStateBank



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-30
Value111111101010
Percentage of NoninterestIncomeOtherOperatingIncome30.629.732.429.432.332.3

zions:OtherSegment



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-30
Value4178192123
Percentage of NoninterestIncomeOtherOperatingIncome11.145.923.555.967.774.2

zions:VectraBankColorado



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-30
Value876666
Percentage of NoninterestIncomeOtherOperatingIncome22.218.917.617.619.419.4

zions:ZionsBank



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-30
Value384039333838
Percentage of NoninterestIncomeOtherOperatingIncome105.6108.1114.797.1122.6122.6

us-gaap:StatementBusinessSegments

us-gaap:Corporate



Period End2020-03-312019-09-302019-03-312018-09-30
Value134146132136
Percentage of NoninterestIncomeOtherOperatingIncome372.2394.6388.2438.7

us-gaap:OccupancyNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-09-302009-06-30
Value333434323336333231283532333233292930293029292828282827272828272927282927282826
Percentage of OccupancyNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeaseLeaseIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value333323333
Percentage of OperatingLeaseLeaseIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeasePayments



Period End2020-03-312019-09-302019-06-302019-03-31
Value13131210
Percentage of OperatingLeasePayments100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-31
Value218-923146127108-49-47-128-61-86312-135-113744-3919-513-3218117136
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RetirementPlanType

us-gaap:OtherPensionPlansDefinedBenefit



Period End2020-03-312019-09-302019-06-302019-03-312018-09-30
Value14720115122-46
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax67.487.078.896.193.9

us-gaap:OtherPensionPlansPostretirementOrSupplementalPlansDefinedBenefit



Period End2020-03-312019-09-302019-06-302019-03-312018-09-30
Value713315-1
Percentage of OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax32.613.021.23.92.0

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

us-gaap:OtherComprehensiveIncomeLossDerivativeExcludedComponentIncreaseDecreaseAdjustmentsBeforeTax

us-gaap:InterestRateFloor, us-gaap:CashFlowHedging, us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value0010153000
Percentage of OtherComprehensiveIncomeLossDerivativeExcludedComponentIncreaseDecreaseAdjustmentsBeforeTax0.00.0100.0100.0100.00.00.00.0

us-gaap:HedgingDesignation

us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value0010153000
Percentage of OtherComprehensiveIncomeLossDerivativeExcludedComponentIncreaseDecreaseAdjustmentsBeforeTax0.00.0100.0100.0100.00.00.00.0

us-gaap:OtherComprehensiveIncomeLossNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-31
Value216-623148128111-45-49-128-82-86211-131-133542-37187913-1725846-9323941-420
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RetirementPlanType

us-gaap:OtherPensionPlansDefinedBenefit



Period End2020-03-312019-09-302019-06-302019-03-312018-09-30
Value14720115122-46
Percentage of OtherComprehensiveIncomeLossNetOfTax68.187.077.795.3102.2

us-gaap:OtherPensionPlansPostretirementOrSupplementalPlansDefinedBenefit



Period End2020-03-312019-09-302019-06-302019-03-312018-09-30
Value6943260
Percentage of OtherComprehensiveIncomeLossNetOfTax31.917.421.64.7-0.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-312012-03-31
Value216-624147128111-46-48-128-57-86211-131-133542-37187913-17258463920
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0104.399.3100.0100.0102.298.0100.069.5100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Parent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value216-624147128111-46-48
Percentage of OtherComprehensiveIncomeLossNetOfTax100.0100.0104.399.3100.0100.0102.298.0

us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-30
Value2-2-1-1-1-1-110001111112100000000011
Percentage of OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax100.0100.0100.0100.0100.0100.0100.0100.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeLossTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value71-28484237-15-16-42-11-5396-80-82127-2311528-917538122-51923
Percentage of OtherComprehensiveIncomeLossTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax

us-gaap:InterestRateFloor, us-gaap:CashFlowHedging, us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value00-220000
Percentage of OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax0.00.0100.0100.00.00.00.00.0

us-gaap:InterestRateSwap, us-gaap:CashFlowHedging, us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value9214124813-1-2
Percentage of OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax0.00.0-50.01200.00.00.00.00.0

us-gaap:HedgingDesignation

us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value9214-126117-1-2-5
Percentage of OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax0.00.050.01300.00.00.00.00.00.0

us-gaap:OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-31
Value69-1263182-10-3-301-1-9-3412-510021010000-1-1-3-4-5-8
Percentage of OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax100.0100.0100.0100.0100.0100.0100.00.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RetirementPlanType

us-gaap:OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax

us-gaap:OtherPensionPlansPostretirementOrSupplementalPlansDefinedBenefit



Period End2020-03-312019-09-302019-06-302019-03-312018-09-30
Value2321020
Percentage of OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax100.0100.0100.0100.00.0

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-30
Value147019116122108-45-50-126-67-86112-128-103232-2711-70-18181071-142948436
Percentage of OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RetirementPlanType

us-gaap:OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax

us-gaap:OtherPensionPlansDefinedBenefit



Period End2020-03-312019-09-302019-06-302019-03-312018-09-30
Value4863840-15
Percentage of OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax100.0100.0100.0100.0100.0

us-gaap:OtherNoncashIncomeExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-30
Value2-513287468-6101014-5132-13-71503375-9-25-41513-3-2102-2-24
Percentage of OtherNoncashIncomeExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherNoninterestExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-09-302009-06-30
Value457251515150494949645454515260505073565358746666726478786767636972668373545561
Percentage of OtherNoninterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherPreferredStockDividendsAndAdjustments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value-89-8-9-89-8-10-710-8-12-1084-10
Percentage of OtherPreferredStockDividendsAndAdjustments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherRevenueExpenseFromRealEstateOperations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value00-20-101000-1
Percentage of OtherRevenueExpenseFromRealEstateOperations0.00.0100.00.0100.00.0100.00.00.00.0100.0

us-gaap:PaymentsForOriginationAndPurchasesOfLoansHeldForSale



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302010-06-302009-06-30
Value3153213161709341618423516536017617630320386356235442359309297301295374419358452401350653
Percentage of PaymentsForOriginationAndPurchasesOfLoansHeldForSale100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsForProceedsFromOtherInvestingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-30
Value-19-240-42-2-12-3-1-2-2-923-1010-1-17-25-3-15-12-1-50-12-72-6
Percentage of PaymentsForProceedsFromOtherInvestingActivities100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsForProceedsFromOtherLoansAndLeases



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value1211-1282081017860962550120311624475919117201731018808558122-148100340126
Percentage of PaymentsForProceedsFromOtherLoansAndLeases100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsForProceedsFromShortTermInvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-09-30
Value547-426401113-940930-106-15711765-363-530145-1185389-1850-2101-1156-1181754-253739955-167280-12276-628-49028855823529150-38014372796877
Percentage of PaymentsForProceedsFromShortTermInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireAvailableForSaleSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-09-302009-06-30
Value1164593243405623667108456461271853535331133384160612433123202617289727846694512214524081244867318740652323827920213919674512
Percentage of PaymentsToAcquireAvailableForSaleSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PaymentsToAcquireHeldToMaturitySecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-09-302009-06-30
Value1714356991100431655789546671803592108360122861427358744542499215247221415
Percentage of PaymentsToAcquireHeldToMaturitySecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementClassOfStock

us-gaap:PreferredStockDividendRatePercentage

us-gaap:SeriesFPreferredStock



Period End2023-03-152013-02-072012-05-072012-05-07
Value0.04240.0630.0790.079
Percentage of PreferredStockDividendRatePercentage100.0100.0100.0

zion:SeriesIPreferredStock



Period End2023-06-152013-05-17
Value0.0380.058
Percentage of PreferredStockDividendRatePercentage0.00.0

zion:SeriesJPreferredStock



Period End2023-09-152013-08-11
Value0.04440.072
Percentage of PreferredStockDividendRatePercentage0.00.0

us-gaap:ProceedsFromIssuanceOfCommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302012-09-302012-06-302012-03-312011-09-302011-06-302011-02-102011-03-312010-06-302009-06-30
Value2613412710529916421213014100020025283123
Percentage of ProceedsFromIssuanceOfCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-09-302009-06-30
Value8288838777585876659927356696376156305305306834752098315385751228362374194847246259359187235440507277302279115409288106
Percentage of ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-09-302009-06-30
Value248072138101771705559658375912733102235262139492019181427533734203012293658267525
Percentage of ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromPaymentsForOtherFinancingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-09-30
Value-901-2-800000080-4000-6000-30-2-500-4-20-200-20-4
Percentage of ProceedsFromPaymentsForOtherFinancingActivities100.00.0100.0100.0100.00.00.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProceedsFromRepaymentsOfDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value04950049704970000
Percentage of ProceedsFromRepaymentsOfDebt0.0100.00.00.0100.00.0100.00.00.00.00.0

us-gaap:ProfessionalFees



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-09-302009-06-30
Value1214101311151214121214131416141211131213112616121016171012121188698999
Percentage of ProfessionalFees100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ProvisionForLoanAndLeaseLosses



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-09-302009-06-30
Value240782027-115-40-115723-218344222180-111-54-540-30-5-21-29-10-11015-114160173184228265565762
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:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:CommercialPortfolioSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-30
Value137119-23-17-11-18-40-4-492202225454322524-57-20-2911-1-5-3-415
Percentage of ProvisionForLoanAndLeaseLosses57.1157.1112.5-115.0-50.0100.0100.0-360.0100.036.4-80.0128.695.721.0118.473.0108.9192.5122.81049.6-1668.9-500.236.754.9-1915.131.723.611.1228.9141.6

us-gaap:CommercialRealEstatePortfolioSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-30
Value597611-6-515-1-3-7-5-3-4-691-13-6426-12234-19-1-4-11-182-10
Percentage of ProvisionForLoanAndLeaseLosses24.6100.075.05.050.0-85.745.5300.02.527.3-140.0-71.4-13.0173.4-34.227.94.0-58.5-36.3880.4-1799.7-1060.8-62.535.6256.981.151.064.2-114.2-93.4

us-gaap:ConsumerPortfolioSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-30
Value4435-426581-41634220-5-7200-250-5-80-8-536
Percentage of ProvisionForLoanAndLeaseLosses18.342.962.5-20.0100.085.7-45.5160.0-2.536.4320.042.917.4-94.315.8-0.9-12.9-34.013.5-69.3-30.7-216.50.89.61453.8-10.237.617.3-177.461.6

us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-03-31
Value2-3-1-1-1-3-310-40117-1-1-1-166-1840257-3-243
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax100.0100.0100.0100.0100.0100.0100.0100.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:RetirementPlanType

us-gaap:OtherPensionPlansPostretirementOrSupplementalPlansDefinedBenefit



Period End2020-03-312019-09-302019-06-302019-03-312018-09-30
Value2-1-1-1-1
Percentage of ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax100.0100.0100.0100.033.3

us-gaap:DerivativeInstrumentRisk, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:ReclassificationFromAociCurrentPeriodTax

us-gaap:InterestRateContract, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AociIncludingPortionAttributableToNoncontrollingInterest



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-30
Value2-1-1-1-1-1
Percentage of ReclassificationFromAociCurrentPeriodTax100.0100.0100.0100.0100.0100.0

us-gaap:RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability



Period End2020-03-312019-09-302019-03-31
Value360
Percentage of RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability100.0100.00.0

us-gaap:SalesTypeAndDirectFinancingLeasesProfitLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value333343433
Percentage of SalesTypeAndDirectFinancingLeasesProfitLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures

us-gaap:CommonStock



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-30
Value463000.076000.0272000.0464000.0102000.0559000.0
Percentage of StockIssuedDuringPeriodSharesRestrictedStockAwardNetOfForfeitures100.0100.0100.0100.0100.0100.0

us-gaap:StockRepurchasedDuringPeriodShares



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value156555322231111
Percentage of StockRepurchasedDuringPeriodShares100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:CommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value1565-5-532-2-2-2-1-1-1
Percentage of StockRepurchasedDuringPeriodShares98.2100.5100.6101.0-100.1-103.0100.2108.1-107.5-116.0-84.4-109.8-96.4-100.0

us-gaap:StatementEquityComponents

us-gaap:StockRepurchasedDuringPeriodValue

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-09-302019-06-302019-03-31
Value-75-275-276-276
Percentage of StockRepurchasedDuringPeriodValue100.0100.0100.0100.0

us-gaap:Parent



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-30
Value-75-275-276-276-186-127
Percentage of StockRepurchasedDuringPeriodValue100.0100.0100.0100.00.00.0

us-gaap:TransferOfPortfolioLoansAndLeasesToHeldForSale1



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value722630073124151111235144022
Percentage of TransferOfPortfolioLoansAndLeasesToHeldForSale1100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:TransferToOtherRealEstate



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-31
Value0511520331122161513334846121723375152
Percentage of TransferToOtherRealEstate0.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:UndistributedEarnings



Period 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
Value5011715513514916015714019177128138
Percentage of UndistributedEarnings100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:UndistributedEarningsLossAvailableToCommonShareholdersDiluted



Period 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-5011515413414815915613919081127137
Percentage of UndistributedEarningsLossAvailableToCommonShareholdersDiluted100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:VariableLeaseCost



Period End2020-03-312019-09-302019-06-302019-03-31
Value12141313
Percentage of VariableLeaseCost100.0100.0100.0100.0

us-gaap:InformationByCategoryOfDebtSecurity

zions:AvailableForSaleDebtSecuritiesGrossUnrealizedGainsRecognizedInOCI

us-gaap:AgencySecurities



Period End2020-03-312019-09-30
Value227
Percentage of AvailableForSaleDebtSecuritiesGrossUnrealizedGainsRecognizedInOCI100.0100.0

zions:AgencyGuaranteedMortgageBackedSecurities



Period End2020-03-312019-09-30
Value23394
Percentage of AvailableForSaleDebtSecuritiesGrossUnrealizedGainsRecognizedInOCI1059.11342.9

us-gaap:InformationByCategoryOfDebtSecurity

zions:AvailableForSaleDebtSecuritiesGrossUnrealizedLossesRecognizedInOCI

us-gaap:AgencySecurities



Period End2020-03-312019-09-30
Value23
Percentage of AvailableForSaleDebtSecuritiesGrossUnrealizedLossesRecognizedInOCI100.0100.0

zions:AgencyGuaranteedMortgageBackedSecurities



Period End2020-03-312019-09-30
Value1551
Percentage of AvailableForSaleDebtSecuritiesGrossUnrealizedLossesRecognizedInOCI750.01700.0

zions:AvailableforsaleOtherdebtsecurities



Period End2020-03-312019-09-30
Value21
Percentage of AvailableForSaleDebtSecuritiesGrossUnrealizedLossesRecognizedInOCI100.033.3

zions:SmallBusinessAdministrationLoanBackedSecurities



Period End2020-03-312019-09-30
Value3842
Percentage of AvailableForSaleDebtSecuritiesGrossUnrealizedLossesRecognizedInOCI1900.01400.0

dei:LegalEntity

zions:AverageDeposits

zions:AmegyCorporation



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value11664781184211361114411381118511060
Percentage of AverageDeposits100.0100.0100.0100.0100.0100.0100.0100.0

zions:CaliforniaBankTrust



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value12129114115651141211243551133511181
Percentage of AverageDeposits104.0146.297.7100.498.339.9101.3101.1

zions:CommerceBankOfWashington



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value1047191097105310752310861048
Percentage of AverageDeposits9.024.49.39.39.416.79.79.5

zions:NationalBankOfArizona



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value5103125028504848941950084942
Percentage of AverageDeposits43.815.442.544.442.813.844.844.7

zions:NevadaStateBank



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value482884454744064329643024314
Percentage of AverageDeposits41.4107.738.438.837.84.338.539.0

zions:OtherSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value32201823562801284255324852221
Percentage of AverageDeposits27.623.119.924.724.8400.722.220.1

zions:VectraBankColorado



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value298820286628112821-127892784
Percentage of AverageDeposits25.625.624.224.724.7-0.724.925.2

zions:ZionsBank



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value15930214159831545515271-4371538515346
Percentage of AverageDeposits136.6274.4135.0136.0133.5-316.7137.6138.8

us-gaap:StatementBusinessSegments

us-gaap:Corporate



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value56909559552845391635653575
Percentage of AverageDeposits487.9716.7466.8471.3258.0479.0

dei:LegalEntity

zions:AverageLoansAndLeases

zions:AmegyCorporation



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value1239949124381225411861-41132811387
Percentage of AverageLoansAndLeases100.0100.0100.0100.0100.0100.0100.0100.0

zions:CaliforniaBankTrust



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value11022181081910838105749299859908
Percentage of AverageLoansAndLeases88.936.787.088.489.1-2300.088.187.0

zions:CommerceBankOfWashington



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value125811123512031110511361117
Percentage of AverageLoansAndLeases10.122.49.99.89.4-125.010.09.8

zions:NationalBankOfArizona



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value4736-144769484747491745914640
Percentage of AverageLoansAndLeases38.2-28.638.339.640.0-425.040.540.7

zions:NevadaStateBank



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value2716362708257025002524082349
Percentage of AverageLoansAndLeases21.973.521.821.021.1-625.021.320.6

zions:OtherSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value5631946944038311344327
Percentage of AverageLoansAndLeases4.538.83.83.63.2-275.03.02.9

zions:VectraBankColorado



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value310223161310530554229692881
Percentage of AverageLoansAndLeases25.04.125.425.325.8-1050.026.225.3

zions:ZionsBank



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value1300130132291306712939781260712633
Percentage of AverageLoansAndLeases104.961.2106.4106.6109.1-1950.0111.3110.9

us-gaap:StatementBusinessSegments

us-gaap:Corporate



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value48797151488284717126645368
Percentage of AverageLoansAndLeases393.6308.2392.6397.7-6650.0400.5

zions:CapitalMarketsAndForeignExchangeGainLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value24192391717147
Percentage of CapitalMarketsAndForeignExchangeGainLoss100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

zions:AmegyCorporation



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value220-1-2118-1-1
Percentage of CapitalMarketsAndForeignExchangeGainLoss8.3105.3-4.3-22.25.9105.9-7.1-14.3

zions:CaliforniaBankTrust



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value01210111
Percentage of CapitalMarketsAndForeignExchangeGainLoss0.05.38.711.10.05.97.114.3

zions:CommerceBankOfWashington



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value0.0-1000000.00.00.00.0-1000000.00.00.0
Percentage of CapitalMarketsAndForeignExchangeGainLoss0.0-5.30.00.00.0-5.90.00.0

zions:NationalBankOfArizona



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value0.01000000.00.00.00.01000000.00.00.0
Percentage of CapitalMarketsAndForeignExchangeGainLoss0.05.30.00.00.05.90.00.0

zions:OtherSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value13112122
Percentage of CapitalMarketsAndForeignExchangeGainLoss4.215.84.311.111.85.914.328.6

zions:ZionsBank



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value02120211
Percentage of CapitalMarketsAndForeignExchangeGainLoss0.010.54.322.20.011.87.114.3

zions:CardFees



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value212224222424
Percentage of CardFees100.0100.0100.0100.0100.0100.0

dei:LegalEntity

zions:CommerceBankOfWashington



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value1000000.00.01000000.01000000.01000000.01000000.0
Percentage of CardFees4.80.04.24.54.24.2

zions:NationalBankOfArizona



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value352342
Percentage of CardFees14.322.78.313.616.78.3

zions:NevadaStateBank



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value362352
Percentage of CardFees14.327.38.313.620.88.3

zions:OtherSegment



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value110120
Percentage of CardFees4.84.50.04.58.30.0

zions:VectraBankColorado



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value131231
Percentage of CardFees4.813.64.29.112.54.2

zions:ZionsBank



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value1261512615
Percentage of CardFees57.127.362.554.525.062.5

us-gaap:StatementBusinessSegments

us-gaap:Corporate



Period End2020-03-312019-09-302019-03-312018-09-30
Value30323132
Percentage of CardFees142.9133.3140.9133.3

zions:CommercialAccountFees



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value313131302931
Percentage of CommercialAccountFees100.0100.0100.0100.0100.0100.0

dei:LegalEntity

zions:AmegyCorporation



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value998889
Percentage of CommercialAccountFees29.029.025.826.727.629.0

zions:CaliforniaBankTrust



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value666656
Percentage of CommercialAccountFees19.419.419.420.017.219.4

zions:CommerceBankOfWashington



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value0.01000000.00.00.01000000.00.0
Percentage of CommercialAccountFees0.03.20.00.03.40.0

zions:NationalBankOfArizona



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value222212
Percentage of CommercialAccountFees6.56.56.56.73.46.5

zions:OtherSegment



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value1000000.0-1000000.00.00.0-1000000.00.0
Percentage of CommercialAccountFees3.2-3.20.00.0-3.40.0

zions:VectraBankColorado



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value212212
Percentage of CommercialAccountFees6.53.26.56.73.46.5

zions:ZionsBank



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value111111101010
Percentage of CommercialAccountFees35.535.535.533.334.532.3

us-gaap:StatementBusinessSegments

us-gaap:Corporate



Period End2020-03-312019-09-302019-03-312018-09-30
Value31313031
Percentage of CommercialAccountFees100.0100.0100.0100.0

zions:CreditAndCollectionServices



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value44286657
Percentage of CreditAndCollectionServices100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

zions:CumulativeEffectAdjustmentMeasurementOfCreditLossesOnFinancialInstruments

us-gaap:Parent



Period End2020-03-31
Value20
Percentage of CumulativeEffectAdjustmentMeasurementOfCreditLossesOnFinancialInstruments100.0

us-gaap:RetainedEarnings



Period End2020-03-31
Value20
Percentage of CumulativeEffectAdjustmentMeasurementOfCreditLossesOnFinancialInstruments100.0

us-gaap:InformationByCategoryOfDebtSecurity

zions:DebSecuritiesHeldtomaturityGrossUnrealizedGains

us-gaap:USStatesAndPoliticalSubdivisions



Period End2020-03-312019-09-30
Value45
Percentage of DebSecuritiesHeldtomaturityGrossUnrealizedGains100.0100.0

us-gaap:InformationByCategoryOfDebtSecurity

zions:DebtSecuritiesHeldtomaturityGrossUnrealizedLosses

us-gaap:USStatesAndPoliticalSubdivisions



Period End2020-03-312019-09-30
Value21
Percentage of DebtSecuritiesHeldtomaturityGrossUnrealizedLosses100.0100.0

zions:DerivativeGainRecognizedOnUndesignatedDerivatives



Period End2020-03-312019-03-31
Value156
Percentage of DerivativeGainRecognizedOnUndesignatedDerivatives100.0100.0

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

zions:DerivativeInstrumentNoninterestIncomeExpense

us-gaap:InterestRateContract, us-gaap:CashFlowHedging, us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value23000100
Percentage of DerivativeInstrumentNoninterestIncomeExpense100.0100.00.00.00.0100.00.00.0

us-gaap:FinancialInstrument, us-gaap:HedgingDesignation

us-gaap:ForeignExchange, us-gaap:Nondesignated



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-30
Value766545
Percentage of DerivativeInstrumentNoninterestIncomeExpense350.00.00.00.00.00.0

us-gaap:InterestRateSwap, us-gaap:Nondesignated



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-30
Value93-1000
Percentage of DerivativeInstrumentNoninterestIncomeExpense450.00.00.00.00.00.0

zions:InterestRateSwapsForCustomers, us-gaap:Nondesignated



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-30
Value312688646-14-14
Percentage of DerivativeInstrumentNoninterestIncomeExpense15600.00.00.00.00.00.0

zions:OffsettingInterestRateDerivatives, us-gaap:Nondesignated



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-30
Value-313-65-85-451718
Percentage of DerivativeInstrumentNoninterestIncomeExpense-15650.00.00.00.00.00.0

us-gaap:HedgingDesignation

us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value23000100
Percentage of DerivativeInstrumentNoninterestIncomeExpense100.0100.00.00.00.0100.00.00.0

zions:DilutiveEffectOfRestrictedStockAwardsAndUnits



Period End2020-03-312019-03-31
Value665000.00.0
Percentage of DilutiveEffectOfRestrictedStockAwardsAndUnits100.00.0

zions:DilutiveEffectofCommonStockWarrants



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value7089901112
Percentage of DilutiveEffectofCommonStockWarrants100.0100.0100.0100.0100.0100.0100.0100.0

zions:DilutiveEffectofStockOptions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value00000001
Percentage of DilutiveEffectofStockOptions100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

zions:EmployeePlansAccumulatedPaidinCapital

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-12-312019-09-302019-06-302019-03-31
Value896611
Percentage of EmployeePlansAccumulatedPaidinCapital100.0100.0100.0100.0100.0

us-gaap:Parent



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-30
Value86611712
Percentage of EmployeePlansAccumulatedPaidinCapital100.0100.0100.0100.00.00.0

us-gaap:FairValueByAssetClass

zions:FairValueAssetsMeasuredOnRecurringBasisAndGainLossIncludedInEquitySecuritiesGainsLossesNet

us-gaap:PrivateEquityFunds



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-421-212-11
Percentage of FairValueAssetsMeasuredOnRecurringBasisAndGainLossIncludedInEquitySecuritiesGainsLossesNet100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByAssetClass

zions:FairValueMeasurementwithUnobservableInputsReconciliationRecurringBasisAssetNoninterestIncome

us-gaap:ServicingContracts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-1002-1100
Percentage of FairValueMeasurementwithUnobservableInputsReconciliationRecurringBasisAssetNoninterestIncome100.00.00.0100.0100.0100.00.00.0

zions:GrossUnrealizedGainsofInvestmentSecuritiesRecognizedinOCI



Period End2020-03-312019-09-30
Value294141
Percentage of GrossUnrealizedGainsofInvestmentSecuritiesRecognizedinOCI100.0100.0

zions:GrossUnrealizedLossesofInvestmentSecuritiesRecognizedinOCI



Period End2020-03-312019-09-30
Value5998
Percentage of GrossUnrealizedLossesofInvestmentSecuritiesRecognizedinOCI100.0100.0

zions:LoanRelatedFeesAndIncome



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value262021161917
Percentage of LoanRelatedFeesAndIncome100.0100.0100.0100.0100.0100.0

zions:LoansModifiedAsTroubledDebtRestructuringsLoans



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value59-334-473626
Percentage of LoansModifiedAsTroubledDebtRestructuringsLoans100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

zions:NetSharesIssuedFromStockWarrantExercises

us-gaap:CommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value1000.00.00.07000.01000.0492000.0183000.053000.0
Percentage of NetSharesIssuedFromStockWarrantExercises100.00.00.0100.0100.0100.0100.0100.0

zions:Netchangeinothernoninterestbearinginvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value-298988-5954-1533
Percentage of Netchangeinothernoninterestbearinginvestments100.0100.0100.0100.0100.0100.0100.0

zions:Netunrealizedgainslossesonothernoninterestbearinginvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value2-3-30-3-102
Percentage of Netunrealizedgainslossesonothernoninterestbearinginvestments100.0100.0100.00.0100.0100.00.0100.0

zions:NoninterestincomeCustomerrelatedFees



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value143133140130122131126125
Percentage of NoninterestincomeCustomerrelatedFees100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

zions:AmegyCorporation



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value3533373434313131
Percentage of NoninterestincomeCustomerrelatedFees24.524.826.426.227.923.724.624.8

zions:CaliforniaBankTrust



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value2424222219231919
Percentage of NoninterestincomeCustomerrelatedFees16.818.015.716.915.617.615.115.2

zions:NationalBankOfArizona



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value111110101010109
Percentage of NoninterestincomeCustomerrelatedFees7.78.37.17.78.27.67.97.2

zions:NevadaStateBank



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value1111111110111010
Percentage of NoninterestincomeCustomerrelatedFees7.78.37.98.58.28.47.98.0

zions:OtherSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value1481278101111
Percentage of NoninterestincomeCustomerrelatedFees9.86.08.65.46.67.68.78.8

zions:VectraBankColorado



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value87766666
Percentage of NoninterestincomeCustomerrelatedFees5.65.35.04.64.94.64.84.8

zions:ZionsBank



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value3938403934393838
Percentage of NoninterestincomeCustomerrelatedFees27.328.628.630.027.929.830.230.4

us-gaap:StatementBusinessSegments

us-gaap:Corporate



Period End2020-03-312019-09-302019-03-312018-09-30
Value143140122126
Percentage of NoninterestincomeCustomerrelatedFees100.0100.0100.0100.0

zions:OtherCustomerRelatedFees



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value665587
Percentage of OtherCustomerRelatedFees100.0100.0100.0100.0100.0100.0

dei:LegalEntity

zions:OtherNonInterestIncomeNonCustomerRelatedGainLoss

zions:AmegyCorporation



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value1000000.00.00.00.00.00.00.00.0
Percentage of OtherNonInterestIncomeNonCustomerRelatedGainLoss100.00.00.00.00.00.00.00.0

zions:CaliforniaBankTrust



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value1000000.01000000.01000000.00.00.00.00.00.0
Percentage of OtherNonInterestIncomeNonCustomerRelatedGainLoss100.00.00.00.00.00.00.00.0

zions:NationalBankOfArizona



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value0.00.00.01000000.00.00.00.01000000.0
Percentage of OtherNonInterestIncomeNonCustomerRelatedGainLoss0.00.00.00.00.00.00.00.0

zions:OtherSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-1018511191012
Percentage of OtherNonInterestIncomeNonCustomerRelatedGainLoss-1000.00.00.00.00.00.00.00.0

zions:ZionsBank



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value-1000000.00.00.00.0-1000000.00.00.00.0
Percentage of OtherNonInterestIncomeNonCustomerRelatedGainLoss-100.00.00.00.00.00.00.00.0

us-gaap:StatementBusinessSegments

us-gaap:Corporate



Period End2020-03-312019-09-302019-03-312018-09-30
Value-961010
Percentage of OtherNonInterestIncomeNonCustomerRelatedGainLoss-900.00.00.00.0

zions:OtherNoninterestBearingInvestmentsNonmarketableEquitySecuritiesGrossGains



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value513214844
Percentage of OtherNoninterestBearingInvestmentsNonmarketableEquitySecuritiesGrossGains100.0100.0100.0100.0100.0100.0100.0100.0

zions:OtherNoninterestBearingInvestmentsNonmarketableEquitySecuritiesGrossLosses



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value1110043653
Percentage of OtherNoninterestBearingInvestmentsNonmarketableEquitySecuritiesGrossLosses100.0100.00.0100.0100.0100.0100.0100.0

dei:LegalEntity

zions:OtherNoninterestIncomeFromContractsWithCustomers

zions:AmegyCorporation



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value0.01000000.00.00.00.00.00.0
Percentage of OtherNoninterestIncomeFromContractsWithCustomers0.0100.00.00.00.00.00.0

zions:CaliforniaBankTrust



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value1000000.01000000.00.00.00.01000000.00.0
Percentage of OtherNoninterestIncomeFromContractsWithCustomers0.0100.00.00.00.00.00.0

zions:NationalBankOfArizona



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value0.00.00.00.00.01000000.00.0
Percentage of OtherNoninterestIncomeFromContractsWithCustomers0.00.00.00.00.00.00.0

zions:NevadaStateBank



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value0.00.00.00.00.01000000.00.0
Percentage of OtherNoninterestIncomeFromContractsWithCustomers0.00.00.00.00.00.00.0

zions:OtherSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value424-2335
Percentage of OtherNoninterestIncomeFromContractsWithCustomers0.0200.00.00.00.00.00.0

zions:ZionsBank



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value1000000.01000000.01000000.0-1000000.01000000.01000000.01000000.0
Percentage of OtherNoninterestIncomeFromContractsWithCustomers0.0100.00.00.00.00.00.0

us-gaap:StatementBusinessSegments

us-gaap:Corporate



Period End2020-03-312019-09-302019-03-312018-09-30
Value6546
Percentage of OtherNoninterestIncomeFromContractsWithCustomers0.00.00.00.0

dei:LegalEntity

zions:OtherNoninterestIncomeLossNonASC606CustomerRelated

zions:AmegyCorporation



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value9-11151311-899
Percentage of OtherNoninterestIncomeLossNonASC606CustomerRelated100.0100.0100.0100.0100.0100.0100.0100.0

zions:CaliforniaBankTrust



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value88665744
Percentage of OtherNoninterestIncomeLossNonASC606CustomerRelated88.9-72.740.046.245.5-87.544.444.4

zions:CommerceBankOfWashington



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value0.01000000.00.00.00.00.00.00.0
Percentage of OtherNoninterestIncomeLossNonASC606CustomerRelated0.0-9.10.00.00.0-0.00.00.0

zions:NationalBankOfArizona



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value31343033
Percentage of OtherNoninterestIncomeLossNonASC606CustomerRelated33.3-9.120.030.827.3-0.033.333.3

zions:NevadaStateBank



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value20332-122
Percentage of OtherNoninterestIncomeLossNonASC606CustomerRelated22.2-0.020.023.118.212.522.222.2

zions:OtherSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value9-43-10-121
Percentage of OtherNoninterestIncomeLossNonASC606CustomerRelated100.036.420.0-7.70.012.522.211.1

zions:VectraBankColorado



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value31321022
Percentage of OtherNoninterestIncomeLossNonASC606CustomerRelated33.3-9.120.015.49.1-0.022.222.2

zions:ZionsBank



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value581111000
Percentage of OtherNoninterestIncomeLossNonASC606CustomerRelated55.6-72.76.77.79.1-125.00.00.0

us-gaap:StatementBusinessSegments

us-gaap:Corporate



Period End2020-03-312019-09-302019-03-312018-09-30
Value39342322
Percentage of OtherNoninterestIncomeLossNonASC606CustomerRelated433.3226.7209.1244.4

zions:PrincipleAmountOfLoansHeldForSaleSold



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value299373278132118136152206
Percentage of PrincipleAmountOfLoansHeldForSaleSold100.0100.0100.0100.0100.0100.0100.0100.0

zions:ProvisionforCreditLosses



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value2584102146111247
Percentage of ProvisionforCreditLosses100.0100.0100.0100.0100.0100.0100.0100.0100.0

dei:LegalEntity

zions:AmegyCorporation



Period End2020-03-312019-03-31
Value10315
Percentage of ProvisionforCreditLosses39.9375.0

zions:CaliforniaBankTrust



Period End2020-03-312019-03-31
Value383
Percentage of ProvisionforCreditLosses14.775.0

zions:CommerceBankOfWashington



Period End2020-03-312019-03-31
Value50
Percentage of ProvisionforCreditLosses1.90.0

zions:NationalBankOfArizona



Period End2020-03-312019-03-31
Value203
Percentage of ProvisionforCreditLosses7.875.0

zions:NevadaStateBank



Period End2020-03-312019-03-31
Value121
Percentage of ProvisionforCreditLosses4.725.0

zions:OtherSegment



Period End2020-03-312019-03-31
Value21
Percentage of ProvisionforCreditLosses0.825.0

zions:VectraBankColorado



Period End2020-03-312019-03-31
Value254
Percentage of ProvisionforCreditLosses9.7100.0

zions:ZionsBank



Period End2020-03-312019-03-31
Value5311
Percentage of ProvisionforCreditLosses20.5275.0

us-gaap:StatementBusinessSegments

us-gaap:Corporate



Period End2020-03-312019-03-31
Value2584
Percentage of ProvisionforCreditLosses100.0100.0

zions:ProvisionforUnfundedLendingCommitmentsdecrease



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value18-3212107
Percentage of ProvisionforUnfundedLendingCommitmentsdecrease100.0100.0100.0100.0100.0100.00.0100.0

us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:CommercialPortfolioSegment



Period End2020-03-312019-12-312019-09-302019-06-302018-12-312018-09-302018-06-30
Value500-1213
Percentage of ProvisionforUnfundedLendingCommitmentsdecrease27.8-0.00.0-100.0200.00.042.9

us-gaap:CommercialRealEstatePortfolioSegment



Period End2020-03-312019-12-312019-09-302019-06-302018-12-312018-09-302018-06-30
Value11-122114
Percentage of ProvisionforUnfundedLendingCommitmentsdecrease61.133.3100.0200.0100.00.057.1

us-gaap:ConsumerPortfolioSegment



Period End2020-03-312019-12-312019-09-302019-06-302018-12-312018-09-302018-06-30
Value2000000
Percentage of ProvisionforUnfundedLendingCommitmentsdecrease11.1-0.00.00.00.00.00.0

zions:RetailAndBusinessBankingFees



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value192020182019
Percentage of RetailAndBusinessBankingFees100.0100.0100.0100.0100.0100.0

dei:LegalEntity

zions:AmegyCorporation



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value445444
Percentage of RetailAndBusinessBankingFees21.120.025.022.220.021.1

zions:CaliforniaBankTrust



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value333343
Percentage of RetailAndBusinessBankingFees15.815.015.016.720.015.8

zions:NevadaStateBank



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value333233
Percentage of RetailAndBusinessBankingFees15.815.015.011.115.015.8

zions:OtherSegment



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value1000000.01000000.00.00.01000000.01000000.0
Percentage of RetailAndBusinessBankingFees5.35.00.00.05.05.3

zions:ZionsBank



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value566667
Percentage of RetailAndBusinessBankingFees26.330.030.033.330.036.8

us-gaap:StatementBusinessSegments

us-gaap:Corporate



Period End2020-03-312019-09-302019-03-312018-09-30
Value19201819
Percentage of RetailAndBusinessBankingFees100.0100.0100.0100.0

dei:LegalEntity

zions:TotalnoninterestincomefromcontractswithcustomersASC606

zions:AmegyCorporation



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value2644222123392222
Percentage of TotalnoninterestincomefromcontractswithcustomersASC606100.0100.0100.0100.0100.0100.0100.0100.0

zions:CaliforniaBankTrust



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value1616161614161515
Percentage of TotalnoninterestincomefromcontractswithcustomersASC60661.536.472.776.260.941.068.268.2

zions:CommerceBankOfWashington



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value1000000.00.01000000.01000000.01000000.01000000.01000000.01000000.0
Percentage of TotalnoninterestincomefromcontractswithcustomersASC6063.80.04.54.84.32.64.54.5

zions:NationalBankOfArizona



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value8107671076
Percentage of TotalnoninterestincomefromcontractswithcustomersASC60630.822.731.828.630.425.631.827.3

zions:NevadaStateBank



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value9118881288
Percentage of TotalnoninterestincomefromcontractswithcustomersASC60634.625.036.438.134.830.836.436.4

zions:OtherSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value51298811910
Percentage of TotalnoninterestincomefromcontractswithcustomersASC60619.227.340.938.134.828.240.945.5

zions:VectraBankColorado



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value56445644
Percentage of TotalnoninterestincomefromcontractswithcustomersASC60619.213.618.219.021.715.418.218.2

zions:ZionsBank



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value3430393833293838
Percentage of TotalnoninterestincomefromcontractswithcustomersASC606130.868.2177.3181.0143.574.4172.7172.7

us-gaap:StatementBusinessSegments

us-gaap:Corporate



Period End2020-03-312019-09-302019-03-312018-09-30
Value10410699104
Percentage of TotalnoninterestincomefromcontractswithcustomersASC606400.0481.8430.4472.7

zions:UndistributedEarningsApplicabletoNonvestedShares



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-30
Value02111111
Percentage of UndistributedEarningsApplicabletoNonvestedShares0.0100.0100.0100.0100.0100.0100.0100.0

zions:WealthManagementAndTrustFees



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value161516141414
Percentage of WealthManagementAndTrustFees100.0100.0100.0100.0100.0100.0

dei:LegalEntity

zions:AmegyCorporation



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value433323
Percentage of WealthManagementAndTrustFees25.020.018.821.414.321.4

zions:CaliforniaBankTrust



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value211111
Percentage of WealthManagementAndTrustFees12.56.76.27.17.17.1

zions:NationalBankOfArizona



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value1000000.00.01000000.00.01000000.01000000.0
Percentage of WealthManagementAndTrustFees6.20.06.20.07.17.1

zions:NevadaStateBank



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value1000000.00.01000000.01000000.01000000.01000000.0
Percentage of WealthManagementAndTrustFees6.20.06.27.17.17.1

zions:OtherSegment



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value164433
Percentage of WealthManagementAndTrustFees6.240.025.028.621.421.4

zions:VectraBankColorado



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value1000000.01000000.00.00.01000000.00.0
Percentage of WealthManagementAndTrustFees6.26.70.00.07.10.0

zions:ZionsBank



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value545444
Percentage of WealthManagementAndTrustFees31.226.731.228.628.628.6

us-gaap:StatementBusinessSegments

us-gaap:Corporate



Period End2020-03-312019-09-302019-03-312018-09-30
Value15151313
Percentage of WealthManagementAndTrustFees93.893.892.992.9

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value26682735300232713541380640520
Percentage of AdditionalPaidInCapital100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value2668273530023271354138064052000
Percentage of AdditionalPaidInCapital100.0100.0100.0100.0100.0100.0100.00.00.00.0

us-gaap:AssetsFairValueDisclosure



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-312016-12-312015-12-312012-03-312011-12-312011-09-302010-12-312010-09-30
Value155901483215283157421605115619155691606914288847334673503426245013630
Percentage of AssetsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel1



Period End2020-03-312019-12-312019-09-302019-06-302018-12-312017-12-312016-12-312016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-312010-09-30
Value152216263167153207286159167121209236210263273326269299313388326217214182166977938203
Percentage of AssetsFairValueDisclosure1.01.51.71.11.01.32.00.02.00.00.00.00.00.00.00.00.00.00.00.00.00.00.05.34.822.920.85.6

us-gaap:FairValueInputsLevel2



Period End2020-03-312019-12-312019-09-302019-06-302018-12-312017-12-312016-12-312016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-312010-09-30
Value15342144911489315451153461574913853930481726622515144953933343231693066269925521897195418811976206721002129207419591770
Percentage of AssetsFairValueDisclosure98.497.797.498.298.398.097.00.096.50.00.00.00.00.00.00.00.00.00.00.00.00.00.060.660.848.743.548.8

us-gaap:FairValueInputsLevel3



Period End2020-03-312019-12-312019-09-302019-06-302018-12-312017-12-312016-12-312016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-312010-09-30
Value96125127124120113148136133133123565514636796799138711321161112910681172112611841207121016041656
Percentage of AssetsFairValueDisclosure0.60.80.80.80.80.71.00.01.60.00.00.00.00.00.00.00.00.00.00.00.00.00.034.234.528.435.645.6

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument

us-gaap:FairValueInputsLevel2, us-gaap:FairValueMeasurementsNonrecurring



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value0077332249
Percentage of AssetsFairValueDisclosure0.00.00.00.00.00.20.20.1

us-gaap:FairValueInputsLevel2, zions:ImpairedLoans



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value006632
Percentage of AssetsFairValueDisclosure0.00.00.00.00.2

us-gaap:FairValueInputsLevel2, zions:OtherRealEstateOwned



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value0.00.01000000.01000000.00.0
Percentage of AssetsFairValueDisclosure0.00.00.00.00.0

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsNonrecurring



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value0.01000000.01000000.00.00.01000000.00.01000000.0
Percentage of AssetsFairValueDisclosure0.00.00.00.00.00.00.00.0

us-gaap:FairValueInputsLevel3, us-gaap:PrivateEquityFunds



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value0.01000000.01000000.00.00.01000000.00.01000000.0
Percentage of AssetsFairValueDisclosure0.00.00.00.00.00.00.00.0

us-gaap:FinancialInstrument

us-gaap:FairValueMeasurementsNonrecurring



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value01873332410
Percentage of AssetsFairValueDisclosure0.00.00.10.00.00.20.20.1

us-gaap:PrivateEquityFunds



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value0.01000000.01000000.00.00.01000000.00.01000000.0
Percentage of AssetsFairValueDisclosure0.00.00.00.00.00.00.00.0

zions:ImpairedLoans



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value006632
Percentage of AssetsFairValueDisclosure0.00.00.00.00.2

zions:OtherRealEstateOwned



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value0.00.01000000.01000000.00.0
Percentage of AssetsFairValueDisclosure0.00.00.00.00.0

us-gaap:InformationByCategoryOfDebtSecurity

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis

us-gaap:AgencySecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value13471301127713721407139414801830
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:USStatesAndPoliticalSubdivisions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value12651282131013221270130313131336
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis93.998.5102.696.490.393.588.773.0

us-gaap:USTreasurySecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value2525254040402525
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis1.91.92.02.92.82.91.71.4

zions:AgencyGuaranteedMortgageBackedSecurities



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value9918951897001011010236
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis736.3731.6759.6736.9734.3

zions:AvailableforsaleOtherdebtsecurities



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value2525262525
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis1.91.92.01.81.8

zions:SmallBusinessAdministrationLoanBackedSecurities



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value14181535165617902042
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis105.3118.0129.7130.5146.5

us-gaap:InformationByCategoryOfDebtSecurity, zions:SecuritiesMaturity

us-gaap:AgencySecurities, zions:After10Years



Period End2020-03-31
Value659
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis48.9

us-gaap:AgencySecurities, zions:DueInOneYearOrLess



Period End2020-03-31
Value1000000.0
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis0.1

us-gaap:AgencySecurities, zions:FiveYearsThrough10Years



Period End2020-03-31
Value408
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis30.3

us-gaap:AgencySecurities, zions:OneYearThroughFiveYears



Period End2020-03-31
Value279
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis20.7

us-gaap:USStatesAndPoliticalSubdivisions, zions:After10Years



Period End2020-03-31
Value103
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis7.6

us-gaap:USStatesAndPoliticalSubdivisions, zions:DueInOneYearOrLess



Period End2020-03-31
Value80
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis5.9

us-gaap:USStatesAndPoliticalSubdivisions, zions:FiveYearsThrough10Years



Period End2020-03-31
Value530
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis39.3

us-gaap:USStatesAndPoliticalSubdivisions, zions:OneYearThroughFiveYears



Period End2020-03-31
Value552
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis41.0

us-gaap:USTreasurySecurities, zions:After10Years



Period End2020-03-31
Value0.0
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis0.0

us-gaap:USTreasurySecurities, zions:DueInOneYearOrLess



Period End2020-03-31
Value25
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis1.9

us-gaap:USTreasurySecurities, zions:FiveYearsThrough10Years



Period End2020-03-31
Value0.0
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis0.0

us-gaap:USTreasurySecurities, zions:OneYearThroughFiveYears



Period End2020-03-31
Value0.0
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis0.0

zions:AgencyGuaranteedMortgageBackedSecurities, zions:After10Years



Period End2020-03-31
Value8714
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis646.9

zions:AgencyGuaranteedMortgageBackedSecurities, zions:DueInOneYearOrLess



Period End2020-03-31
Value2
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis0.1

zions:AgencyGuaranteedMortgageBackedSecurities, zions:FiveYearsThrough10Years



Period End2020-03-31
Value1075
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis79.8

zions:AgencyGuaranteedMortgageBackedSecurities, zions:OneYearThroughFiveYears



Period End2020-03-31
Value127
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis9.4

zions:AvailableforsaleOtherdebtsecurities, zions:After10Years



Period End2020-03-31
Value15
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis1.1

zions:AvailableforsaleOtherdebtsecurities, zions:DueInOneYearOrLess



Period End2020-03-31
Value0.0
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis0.0

zions:AvailableforsaleOtherdebtsecurities, zions:FiveYearsThrough10Years



Period End2020-03-31
Value10
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis0.7

zions:AvailableforsaleOtherdebtsecurities, zions:OneYearThroughFiveYears



Period End2020-03-31
Value0.0
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis0.0

zions:SmallBusinessAdministrationLoanBackedSecurities, zions:After10Years



Period End2020-03-31
Value1229
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis91.2

zions:SmallBusinessAdministrationLoanBackedSecurities, zions:DueInOneYearOrLess



Period End2020-03-31
Value0.0
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis0.0

zions:SmallBusinessAdministrationLoanBackedSecurities, zions:FiveYearsThrough10Years



Period End2020-03-31
Value166
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis12.3

zions:SmallBusinessAdministrationLoanBackedSecurities, zions:OneYearThroughFiveYears



Period End2020-03-31
Value23
Percentage of AvailableForSaleDebtSecuritiesAmortizedCostBasis1.7

us-gaap:AvailableForSaleSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value14231137251403314672149041473714625146271489615161152421534115606133721035894778701764360004652445038443563346234233701333331933287309131273167322332303970408441304205329534163437365535473903
Percentage of AvailableForSaleSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AvailableForSaleSecuritiesAmortizedCost



Period End2020-03-312019-12-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312014-02-122013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312010-09-302010-06-30
Value139981368615040150711501215215153131528615372157361352010299940186797672598446554583395536693611358128239493841369038343716388139894053409948644863493840164116
Percentage of AvailableForSaleSecuritiesAmortizedCost100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

zions:SecuritiesMaturity

zions:After10Years



Period End2020-03-31
Value10720
Percentage of AvailableForSaleSecuritiesAmortizedCost76.6

zions:DueInOneYearOrLess



Period End2020-03-31
Value108
Percentage of AvailableForSaleSecuritiesAmortizedCost0.8

zions:FiveYearsThrough10Years



Period End2020-03-31
Value2189
Percentage of AvailableForSaleSecuritiesAmortizedCost15.6

zions:OneYearThroughFiveYears



Period End2020-03-31
Value981
Percentage of AvailableForSaleSecuritiesAmortizedCost7.0

us-gaap:FinancialInstrument

us-gaap:AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue

us-gaap:AvailableforsaleSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value258964116541689510393117091367611801
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InformationByCategoryOfDebtSecurity

us-gaap:AgencySecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value1745814836201040115813241616
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue6.79.17.49.010.09.99.713.7

us-gaap:USStatesAndPoliticalSubdivisions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value65551291894989071165784
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue2.50.92.02.74.87.78.56.6

zions:AgencyGuaranteedMortgageBackedSecurities



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value10624388442046077742
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue41.068.467.666.866.1

zions:AvailableforsaleUnrealizedlossesOther



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value130141511
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue0.50.00.20.20.1

zions:SmallBusinessAdministrationLoanBackedSecurities



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value12751387149514641891
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue49.221.622.921.216.1

us-gaap:FinancialInstrument

us-gaap:AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue

us-gaap:AvailableforsaleSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value865161713891501232277270645379
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InformationByCategoryOfDebtSecurity

us-gaap:AgencySecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value872221171446245970808
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue10.113.78.49.33.78.813.715.0

us-gaap:USStatesAndPoliticalSubdivisions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value65501223040266834554
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue7.53.18.820.03.29.611.810.3

zions:AgencyGuaranteedMortgageBackedSecurities



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value5471173973721081
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue63.272.570.148.039.0

zions:AvailableforsaleUnrealizedlossesOther



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value130000
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue1.50.00.00.00.0

zions:SmallBusinessAdministrationLoanBackedSecurities



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value153172177341180
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue17.710.612.722.742.6

us-gaap:FinancialInstrument

us-gaap:AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue

us-gaap:AvailableforsaleSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value17244794515267459161893766126422
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InformationByCategoryOfDebtSecurity

us-gaap:AgencySecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value87359366606994913354808
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue5.07.57.19.010.910.25.412.6

us-gaap:USStatesAndPoliticalSubdivisions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value057159458641331230
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue0.00.10.12.45.07.25.03.6

zions:AgencyGuaranteedMortgageBackedSecurities



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value5153215344745356661
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue29.967.166.967.274.5

zions:AvailableforsaleUnrealizedlossesOther



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value00141511
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue0.00.00.30.20.1

zions:SmallBusinessAdministrationLoanBackedSecurities



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value1122121513181430711
Percentage of AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue65.125.325.621.28.0

us-gaap:InformationByCategoryOfDebtSecurity

us-gaap:AvailableForSaleSecuritiesDebtSecurities

us-gaap:AgencySecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value13671302128113731398137514481818
Percentage of AvailableForSaleSecuritiesDebtSecurities100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:USStatesAndPoliticalSubdivisions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value12991319134413501283129112841334
Percentage of AvailableForSaleSecuritiesDebtSecurities95.0101.3104.998.391.893.988.773.4

us-gaap:USTreasurySecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value2525254040402525
Percentage of AvailableForSaleSecuritiesDebtSecurities1.81.92.02.92.92.91.71.4

zions:AgencyGuaranteedMortgageBackedSecurities



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value10136955997431013310014
Percentage of AvailableForSaleSecuritiesDebtSecurities741.5734.2760.6738.0728.3

zions:AvailableforsaleOtherdebtsecurities



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value2325252521
Percentage of AvailableForSaleSecuritiesDebtSecurities1.71.92.01.81.5

zions:SmallBusinessAdministrationLoanBackedSecurities



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value13811495161517511996
Percentage of AvailableForSaleSecuritiesDebtSecurities101.0114.8126.1127.5145.2

us-gaap:AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value642.0849.01041.01182.01891.02588.03018.04317.02811.02262.01446.01529.02121.02398.0814.0470.0684.0709.0460.0545.0433.0458.0395.0338.0334.0317.0258.0218.0256.0
Percentage of AvailableforsaleSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions1100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CapitalLeaseObligations



Period End2020-03-312019-12-312019-09-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-312012-12-31
Value44400111111000000011000
Percentage of CapitalLeaseObligations100.0100.0100.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CashAndDueFromBanks



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-312008-12-312007-12-31
Value73070579653853661451746847054854148156673755356051779860275872084558813841341117513651183928184110601124108212241102103594992410601068104513709921229132114751855
Percentage of CashAndDueFromBanks100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtInstrumentCarryingAmount



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value1795172312421236122872487938338338338338338353557069880281294410501089109211132273
Percentage of DebtInstrumentCarryingAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancialInstrument

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss

us-gaap:AvailableforsaleSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value488093106181287302137
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InformationByCategoryOfDebtSecurity

us-gaap:AgencySecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value12351117127
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss2.12.53.24.76.15.94.05.1

us-gaap:USStatesAndPoliticalSubdivisions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value0000314155
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss0.00.00.00.01.74.95.03.6

zions:AgencyGuaranteedMortgageBackedSecurities



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value9384862224
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss18.847.551.658.578.0

zions:AvailableforsaleUnrealizedlossesOther



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value00104
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss0.00.01.10.01.4

zions:SmallBusinessAdministrationLoanBackedSecurities



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value3840413928
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss79.250.044.136.89.8

us-gaap:FinancialInstrument

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss

us-gaap:AvailableforsaleSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value9742153915244
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InformationByCategoryOfDebtSecurity

us-gaap:AgencySecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value120002206
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss11.128.60.00.00.05.113.213.6

us-gaap:USStatesAndPoliticalSubdivisions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value000002156
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss0.00.00.00.00.05.19.913.6

zions:AgencyGuaranteedMortgageBackedSecurities



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value643116
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss66.757.175.050.041.0

zions:AvailableforsaleUnrealizedlossesOther



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value20000
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss22.20.00.00.00.0

zions:SmallBusinessAdministrationLoanBackedSecurities



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value011119
Percentage of DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss0.014.325.050.048.7

us-gaap:InformationByCategoryOfDebtSecurity, zions:SecuritiesMaturity

us-gaap:DebtSecuritiesAvailableForSaleMaturityAfterFiveThroughTenYearsWeightedAverageYield

us-gaap:AgencySecurities, zions:FiveYearsThrough10Years



Period End2020-03-31
Value0.0261
Percentage of DebtSecuritiesAvailableForSaleMaturityAfterFiveThroughTenYearsWeightedAverageYield100.0

us-gaap:USStatesAndPoliticalSubdivisions, zions:FiveYearsThrough10Years



Period End2020-03-31
Value0.0291
Percentage of DebtSecuritiesAvailableForSaleMaturityAfterFiveThroughTenYearsWeightedAverageYield111.5

us-gaap:USTreasurySecurities, zions:FiveYearsThrough10Years



Period End2020-03-31
Value0.0
Percentage of DebtSecuritiesAvailableForSaleMaturityAfterFiveThroughTenYearsWeightedAverageYield0.0

zions:AgencyGuaranteedMortgageBackedSecurities, zions:FiveYearsThrough10Years



Period End2020-03-31
Value0.018
Percentage of DebtSecuritiesAvailableForSaleMaturityAfterFiveThroughTenYearsWeightedAverageYield69.0

zions:AvailableforsaleOtherdebtsecurities, zions:FiveYearsThrough10Years



Period End2020-03-31
Value0.095
Percentage of DebtSecuritiesAvailableForSaleMaturityAfterFiveThroughTenYearsWeightedAverageYield364.0

zions:SmallBusinessAdministrationLoanBackedSecurities, zions:FiveYearsThrough10Years



Period End2020-03-31
Value0.0254
Percentage of DebtSecuritiesAvailableForSaleMaturityAfterFiveThroughTenYearsWeightedAverageYield97.3

zions:SecuritiesMaturity

zions:FiveYearsThrough10Years



Period End2020-03-31
Value0.0231
Percentage of DebtSecuritiesAvailableForSaleMaturityAfterFiveThroughTenYearsWeightedAverageYield88.5

us-gaap:InformationByCategoryOfDebtSecurity, zions:SecuritiesMaturity

us-gaap:DebtSecuritiesAvailableForSaleMaturityAfterOneThroughFiveYearsWeightedAverageYield

us-gaap:AgencySecurities, zions:OneYearThroughFiveYears



Period End2020-03-31
Value0.0178
Percentage of DebtSecuritiesAvailableForSaleMaturityAfterOneThroughFiveYearsWeightedAverageYield100.0

us-gaap:USStatesAndPoliticalSubdivisions, zions:OneYearThroughFiveYears



Period End2020-03-31
Value0.0232
Percentage of DebtSecuritiesAvailableForSaleMaturityAfterOneThroughFiveYearsWeightedAverageYield130.3

us-gaap:USTreasurySecurities, zions:OneYearThroughFiveYears



Period End2020-03-31
Value0.0
Percentage of DebtSecuritiesAvailableForSaleMaturityAfterOneThroughFiveYearsWeightedAverageYield0.0

zions:AgencyGuaranteedMortgageBackedSecurities, zions:OneYearThroughFiveYears



Period End2020-03-31
Value0.0152
Percentage of DebtSecuritiesAvailableForSaleMaturityAfterOneThroughFiveYearsWeightedAverageYield85.4

zions:AvailableforsaleOtherdebtsecurities, zions:OneYearThroughFiveYears



Period End2020-03-31
Value0.0
Percentage of DebtSecuritiesAvailableForSaleMaturityAfterOneThroughFiveYearsWeightedAverageYield0.0

zions:SmallBusinessAdministrationLoanBackedSecurities, zions:OneYearThroughFiveYears



Period End2020-03-31
Value0.0235
Percentage of DebtSecuritiesAvailableForSaleMaturityAfterOneThroughFiveYearsWeightedAverageYield132.0

zions:SecuritiesMaturity

zions:OneYearThroughFiveYears



Period End2020-03-31
Value0.0206
Percentage of DebtSecuritiesAvailableForSaleMaturityAfterOneThroughFiveYearsWeightedAverageYield115.7

us-gaap:InformationByCategoryOfDebtSecurity, zions:SecuritiesMaturity

us-gaap:DebtSecuritiesAvailableForSaleMaturityRollingAfter10YearsWeightedAverageYield

us-gaap:AgencySecurities, zions:After10Years



Period End2020-03-31
Value0.0263
Percentage of DebtSecuritiesAvailableForSaleMaturityRollingAfter10YearsWeightedAverageYield100.0

us-gaap:USStatesAndPoliticalSubdivisions, zions:After10Years



Period End2020-03-31
Value0.0342
Percentage of DebtSecuritiesAvailableForSaleMaturityRollingAfter10YearsWeightedAverageYield130.0

us-gaap:USTreasurySecurities, zions:After10Years



Period End2020-03-31
Value0.0
Percentage of DebtSecuritiesAvailableForSaleMaturityRollingAfter10YearsWeightedAverageYield0.0

zions:AgencyGuaranteedMortgageBackedSecurities, zions:After10Years



Period End2020-03-31
Value0.0241
Percentage of DebtSecuritiesAvailableForSaleMaturityRollingAfter10YearsWeightedAverageYield91.6

zions:AvailableforsaleOtherdebtsecurities, zions:After10Years



Period End2020-03-31
Value0.0461
Percentage of DebtSecuritiesAvailableForSaleMaturityRollingAfter10YearsWeightedAverageYield175.3

zions:SmallBusinessAdministrationLoanBackedSecurities, zions:After10Years



Period End2020-03-31
Value0.0291
Percentage of DebtSecuritiesAvailableForSaleMaturityRollingAfter10YearsWeightedAverageYield110.6

zions:SecuritiesMaturity

zions:After10Years



Period End2020-03-31
Value0.0249
Percentage of DebtSecuritiesAvailableForSaleMaturityRollingAfter10YearsWeightedAverageYield94.7

us-gaap:InformationByCategoryOfDebtSecurity, zions:SecuritiesMaturity

us-gaap:DebtSecuritiesAvailableForSaleMaturityWithinOneYearWeightedAverageYield

us-gaap:AgencySecurities, zions:DueInOneYearOrLess



Period End2020-03-31
Value0.0376
Percentage of DebtSecuritiesAvailableForSaleMaturityWithinOneYearWeightedAverageYield100.0

us-gaap:USStatesAndPoliticalSubdivisions, zions:DueInOneYearOrLess



Period End2020-03-31
Value0.0213
Percentage of DebtSecuritiesAvailableForSaleMaturityWithinOneYearWeightedAverageYield56.6

us-gaap:USTreasurySecurities, zions:DueInOneYearOrLess



Period End2020-03-31
Value0.004
Percentage of DebtSecuritiesAvailableForSaleMaturityWithinOneYearWeightedAverageYield10.6

zions:AgencyGuaranteedMortgageBackedSecurities, zions:DueInOneYearOrLess



Period End2020-03-31
Value0.0364
Percentage of DebtSecuritiesAvailableForSaleMaturityWithinOneYearWeightedAverageYield96.8

zions:AvailableforsaleOtherdebtsecurities, zions:DueInOneYearOrLess



Period End2020-03-31
Value0.0
Percentage of DebtSecuritiesAvailableForSaleMaturityWithinOneYearWeightedAverageYield0.0

zions:SmallBusinessAdministrationLoanBackedSecurities, zions:DueInOneYearOrLess



Period End2020-03-31
Value0.0
Percentage of DebtSecuritiesAvailableForSaleMaturityWithinOneYearWeightedAverageYield0.0

zions:SecuritiesMaturity

zions:DueInOneYearOrLess



Period End2020-03-31
Value0.0177
Percentage of DebtSecuritiesAvailableForSaleMaturityWithinOneYearWeightedAverageYield47.1

us-gaap:FinancialInstrument

us-gaap:DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss

us-gaap:AvailableforsaleSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value578797108196326454181
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InformationByCategoryOfDebtSecurity

us-gaap:AgencySecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value243511193213
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss3.54.63.14.65.65.87.07.2

us-gaap:USStatesAndPoliticalSubdivisions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value00003163011
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss0.00.00.00.01.54.96.66.1

zions:AgencyGuaranteedMortgageBackedSecurities



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value15425163240
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss26.348.352.658.373.6

zions:AvailableforsaleUnrealizedlossesOther



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value20104
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss3.50.01.00.01.2

zions:SmallBusinessAdministrationLoanBackedSecurities



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value3841424047
Percentage of DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss66.747.143.337.014.4

us-gaap:Deposits



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value5751857085561395433254535541015378553580529635262152099523785347553235508485027049887503744892048937481234784746265456704653246361456694501644490461334377243160430994287541363411914059240935409604201342095418404300742644
Percentage of Deposits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DepositsSavingsDeposits



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312013-12-312012-12-312011-12-31
Value28901287902742726470263482612025462255622547325620251792516526071263632550225540257232567224583230292289621775
Percentage of DepositsSavingsDeposits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:BalanceSheetLocation

us-gaap:DerivativeFairValueOfDerivativeAsset

us-gaap:OtherAssets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value47415821017282452329283843465564129152125771036383665457576555597181
Percentage of DerivativeFairValueOfDerivativeAsset100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:FinancialInstrument, us-gaap:HedgingDesignation

us-gaap:OtherAssets, us-gaap:CashFlowHedging, us-gaap:InterestRateFloor, us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-31
Value0002690
Percentage of DerivativeFairValueOfDerivativeAsset0.00.00.015.111.00.0

us-gaap:OtherAssets, us-gaap:FairValueHedging, zions:InterestRateSwapsForCustomers, us-gaap:Nondesignated



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value4471412031367
Percentage of DerivativeFairValueOfDerivativeAsset94.389.296.779.115.6

us-gaap:OtherAssets, us-gaap:FairValueHedging, zions:OffsettingInterestRateDerivatives, us-gaap:Nondesignated



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value050333
Percentage of DerivativeFairValueOfDerivativeAsset0.03.20.01.773.3

us-gaap:BalanceSheetLocation, us-gaap:FinancialInstrument, us-gaap:HedgingDesignation

us-gaap:OtherAssets, us-gaap:ForeignExchange, us-gaap:Nondesignated



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value84333449
Percentage of DerivativeFairValueOfDerivativeAsset1.72.51.41.73.78.917.423.7

us-gaap:OtherAssets, us-gaap:InterestRateSwap, us-gaap:Nondesignated



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value193421111
Percentage of DerivativeFairValueOfDerivativeAsset4.01.91.91.21.22.24.32.6

us-gaap:OtherAssets, zions:InterestRateSwapsForCustomers, us-gaap:Nondesignated



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value44714620313837
Percentage of DerivativeFairValueOfDerivativeAsset94.392.496.780.282.2

us-gaap:OtherAssets, zions:OffsettingInterestRateDerivatives, us-gaap:Nondesignated



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value050333
Percentage of DerivativeFairValueOfDerivativeAsset0.03.20.01.773.3

us-gaap:BalanceSheetLocation, us-gaap:HedgingDesignation

us-gaap:OtherAssets, us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value00026900000218272251734101000001
Percentage of DerivativeFairValueOfDerivativeAsset0.00.00.015.111.00.00.00.00.00.03.614.617.817.77.016.85.35.52.30.52.20.50.30.70.10.41.5

us-gaap:OtherAssets, us-gaap:Nondesignated



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value4741582101467345232928384346546111012510372856079645455576555597180
Percentage of DerivativeFairValueOfDerivativeAsset100.0100.0100.084.989.0100.0100.0100.0100.0100.0100.0100.098.296.485.482.282.393.083.294.794.597.799.597.899.599.799.399.999.698.5

us-gaap:BalanceSheetLocation

us-gaap:DerivativeFairValueOfDerivativeLiability

us-gaap:OtherLiabilities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value4841672231552539767056403538565911112710472866081665656626859647989
Percentage of DerivativeFairValueOfDerivativeLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:BalanceSheetLocation, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:FinancialInstrument, us-gaap:HedgingDesignation

us-gaap:OtherLiabilities, us-gaap:FairValueHedging, zions:InterestRateSwapsForCustomers, us-gaap:Nondesignated



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value050333
Percentage of DerivativeFairValueOfDerivativeLiability0.03.00.01.984.6

us-gaap:OtherLiabilities, us-gaap:FairValueHedging, zions:OffsettingInterestRateDerivatives, us-gaap:Nondesignated



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value2991383
Percentage of DerivativeFairValueOfDerivativeLiability6.05.45.85.27.7

us-gaap:BalanceSheetLocation, us-gaap:FinancialInstrument, us-gaap:HedgingDesignation

us-gaap:OtherLiabilities, us-gaap:ForeignExchange, us-gaap:Nondesignated



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value74222237
Percentage of DerivativeFairValueOfDerivativeLiability1.42.40.91.38.05.13.917.5

us-gaap:OtherLiabilities, us-gaap:InterestRateSwap, us-gaap:Nondesignated



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value81111100
Percentage of DerivativeFairValueOfDerivativeLiability1.70.60.40.64.02.60.00.0

us-gaap:OtherLiabilities, zions:InterestRateSwapsForCustomers, us-gaap:Nondesignated



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value050333
Percentage of DerivativeFairValueOfDerivativeLiability0.03.00.01.984.6

us-gaap:OtherLiabilities, zions:OffsettingInterestRateDerivatives, us-gaap:Nondesignated



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value46915722014940
Percentage of DerivativeFairValueOfDerivativeLiability96.994.098.796.1102.6

us-gaap:BalanceSheetLocation, us-gaap:HedgingDesignation

us-gaap:OtherLiabilities, us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value000000000010000000000000000
Percentage of DerivativeFairValueOfDerivativeLiability0.00.00.00.00.00.00.00.00.00.01.90.00.00.01.30.00.70.00.21.20.10.80.90.00.00.00.0

us-gaap:OtherLiabilities, us-gaap:Nondesignated



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-31
Value4841672231552539767056403538535811112710471865981655556626759647989
Percentage of DerivativeFairValueOfDerivativeLiability100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.094.698.1100.0100.0100.098.7100.099.3100.099.898.899.999.299.1100.0100.0100.0100.0

us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:FinancialInstrument, us-gaap:HedgingDesignation

us-gaap:DerivativeNotionalAmount

us-gaap:CashFlowHedging, us-gaap:InterestRateFloor, us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value00035000
Percentage of DerivativeNotionalAmount0.00.00.0100.00.0

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



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value500150010001000500
Percentage of DerivativeNotionalAmount0.00.00.028.60.0

us-gaap:FinancialInstrument

us-gaap:OtherDebtSecurities



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value163291503013677139607528
Percentage of DerivativeNotionalAmount0.00.00.0398.90.0

us-gaap:FinancialInstrument, us-gaap:HedgingDesignation

us-gaap:ForeignExchange, us-gaap:Nondesignated



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value467385298366389
Percentage of DerivativeNotionalAmount0.00.00.010.50.0

us-gaap:InterestRateSwap, us-gaap:Nondesignated



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value1916726812570300
Percentage of DerivativeNotionalAmount0.00.00.016.30.0

zions:InterestRateSwapsForCustomers, us-gaap:Nondesignated



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value49484409398034102826
Percentage of DerivativeNotionalAmount0.00.00.097.40.0

zions:OffsettingInterestRateDerivatives, us-gaap:Nondesignated



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value49604422397434512826
Percentage of DerivativeNotionalAmount0.00.00.098.60.0

us-gaap:HedgingDesignation

us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value40385088461361631187
Percentage of DerivativeNotionalAmount0.00.00.0176.10.0

us-gaap:Nondesignated



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value122919942906477976341
Percentage of DerivativeNotionalAmount0.00.00.0222.80.0

us-gaap:EquityMethodInvestmentsFairValueDisclosure



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value4745413836353438353635383835
Percentage of EquityMethodInvestmentsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByAssetClass

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue

us-gaap:PrivateEquityFunds



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312010-09-302010-06-302009-12-31
Value7910710710510710210310210095938278128131122119120120110107998382818277756964711217362130136141144147158
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ServicingContracts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-31
Value171819191718181818181919202020181714
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue21.516.817.818.115.917.617.517.618.018.920.423.225.615.515.214.714.311.7

us-gaap:FederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchase



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-31
Value37652053457960234944565337804158486749764624434231378271115270232346272227203244191258279266252240325320451759486608630630727722738892953786
Percentage of FederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchase100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FederalFundsSoldAndSecuritiesPurchasedUnderAgreementsToResell



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-31
Value550484504620438146156055869651446742736356816756201587619132514041519138635547837928220922123402775196083521021651236713011610311778
Percentage of FederalFundsSoldAndSecuritiesPurchasedUnderAgreementsToResell100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FederalHomeLoanBankStockAndFederalReserveBankStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value197157252332272329311341373338324330293211221191196191220244250250249246243248248226232
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:FinanceLeaseWeightedAverageDiscountRatePercent



Period End2020-03-312019-12-31
Value0.03131000.0
Percentage of FinanceLeaseWeightedAverageDiscountRatePercent100.0100.0

us-gaap:FinancialInstrumentsSoldNotYetPurchasedAtFairValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-312016-12-312015-12-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value1866466528549952530732115126211044744304210142418147433951
Percentage of FinancialInstrumentsSoldNotYetPurchasedAtFairValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel1



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value1866466528549449695481181332556163029116242610173211526
Percentage of FinancialInstrumentsSoldNotYetPurchasedAtFairValue100.0100.0100.0100.0100.0100.0100.00.00.0100.00.00.00.0100.00.00.00.0100.00.00.00.00.00.00.00.0100.0100.0100.0100.0

us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:FinancingReceivableNonaccrualNoAllowance

us-gaap:CommercialLoan



Period End2020-03-31
Value59
Percentage of FinancingReceivableNonaccrualNoAllowance100.0

us-gaap:CommercialRealEstate



Period End2020-03-31
Value10
Percentage of FinancingReceivableNonaccrualNoAllowance16.9

us-gaap:ConsumerLoan



Period End2020-03-31
Value9
Percentage of FinancingReceivableNonaccrualNoAllowance15.3

us-gaap:ConsumerPortfolioSegment



Period End2020-03-31
Value0.0
Percentage of FinancingReceivableNonaccrualNoAllowance0.0

us-gaap:FinanceLeasesPortfolioSegment



Period End2020-03-31
Value0.0
Percentage of FinancingReceivableNonaccrualNoAllowance0.0

us-gaap:HomeEquity



Period End2020-03-31
Value1000000.0
Percentage of FinancingReceivableNonaccrualNoAllowance1.7

zions:BankcardAndOtherRevolvingPlans



Period End2020-03-31
Value0.0
Percentage of FinancingReceivableNonaccrualNoAllowance0.0

zions:CommercialAndIndustrial



Period End2020-03-31
Value32
Percentage of FinancingReceivableNonaccrualNoAllowance54.2

zions:ConstructionAndOtherConsumerRealEstate



Period End2020-03-31
Value0.0
Percentage of FinancingReceivableNonaccrualNoAllowance0.0

zions:ConstructionandLandDevelopment



Period End2020-03-31
Value0.0
Percentage of FinancingReceivableNonaccrualNoAllowance0.0

zions:FinancingReceivablesTotal



Period End2020-03-31
Value78
Percentage of FinancingReceivableNonaccrualNoAllowance132.2

zions:Municipal



Period End2020-03-31
Value0.0
Percentage of FinancingReceivableNonaccrualNoAllowance0.0

zions:OneThroughFourFamilyResidential



Period End2020-03-31
Value8
Percentage of FinancingReceivableNonaccrualNoAllowance13.6

zions:OwnerOccupied



Period End2020-03-31
Value27
Percentage of FinancingReceivableNonaccrualNoAllowance45.8

zions:Term



Period End2020-03-31
Value10
Percentage of FinancingReceivableNonaccrualNoAllowance16.9

us-gaap:FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-31
Value81061781012516223019303528283732342731293051384031445961759911593101141
Percentage of FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:CommercialLoan



Period End2020-03-312019-12-312018-12-312017-12-312016-12-312015-12-312015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value69717176584302545
Percentage of FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing75.090.070.077.349.621.016.527.413.47.12.56.516.911.39.4

us-gaap:CommercialRealEstate



Period End2020-03-312019-12-312018-12-312017-12-312016-12-312015-12-312015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value0012122124190735220
Percentage of FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing0.00.010.09.135.567.877.667.72.815.210.513.97.45.81.6

us-gaap:ConsumerLoan



Period End2020-03-312019-12-312018-12-312017-12-312016-12-312015-12-312015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value212353112211132
Percentage of FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing25.010.020.013.614.911.25.84.99.74.24.54.35.27.14.8

us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:FinancingReceivablesPeriodPastDue

us-gaap:CommercialRealEstatePortfolioSegment, us-gaap:CommercialRealEstatePortfolioSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0005100000
Percentage of FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing0.00.00.029.412.50.00.00.00.00.0

us-gaap:FinanceLeasesPortfolioSegment, us-gaap:FinanceLeasesPortfolioSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value0.01000000.00.00.00.00.00.00.00.00.0
Percentage of FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing0.010.00.00.00.00.00.00.00.00.0

zions:BankcardAndOtherRevolvingPlans, us-gaap:RevolvingCreditFacility



Period End2020-03-312019-12-312019-09-302019-06-30
Value2112
Percentage of FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing25.010.016.711.8

zions:CommercialAndIndustrial, zions:CommercialAndIndustrial



Period End2020-03-312019-12-312019-09-302019-06-30
Value5854
Percentage of FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing62.580.083.323.5

zions:OwnerOccupied, zions:OwnerOccupied



Period End2020-03-312019-12-312019-09-302019-06-30
Value1006
Percentage of FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing12.50.00.035.3

us-gaap:FinancingReceivableRecordedInvestmentCurrent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-31
Value496724851048638484024736046539455884498144819444974384043418423534233942212421974113140363397943972539880397963946639296388333871137924377863722537046365363614135780364643593935454
Percentage of FinancingReceivableRecordedInvestmentCurrent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:CommercialLoan



Period End2020-03-312019-12-312018-12-312017-12-312016-12-312015-12-312015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value262252525424052227402140121308213642129821012209482052920573199321991619487
Percentage of FinancingReceivableRecordedInvestmentCurrent52.852.151.751.150.552.853.653.553.253.352.953.152.652.752.6

us-gaap:CommercialRealEstate



Period End2020-03-312019-12-312018-12-312017-12-312016-12-312015-12-312015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value11712115391110911093113001030410065100551000710250102701013310086100849821
Percentage of FinancingReceivableRecordedInvestmentCurrent23.623.823.924.926.725.525.225.325.426.126.426.226.626.726.5

us-gaap:ConsumerLoan



Period End2020-03-312019-12-312018-12-312017-12-312016-12-312015-12-312015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value1173511717113781066496388750845084438285789477867699756673957283
Percentage of FinancingReceivableRecordedInvestmentCurrent23.624.224.424.022.821.721.221.221.020.120.119.920.019.619.7

us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:FinancingReceivablesPeriodPastDue

us-gaap:CommercialRealEstatePortfolioSegment, us-gaap:CommercialRealEstatePortfolioSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value2256220623462580233321852295219620942014
Percentage of FinancingReceivableRecordedInvestmentCurrent4.54.54.85.34.94.75.04.94.74.5

us-gaap:ConsumerPortfolioSegment, us-gaap:ConsumerPortfolioSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value151154164167174179173174173184
Percentage of FinancingReceivableRecordedInvestmentCurrent0.30.30.30.30.40.40.40.40.40.4

us-gaap:FinanceLeasesPortfolioSegment, us-gaap:FinanceLeasesPortfolioSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value330334331337311325331356370363
Percentage of FinancingReceivableRecordedInvestmentCurrent0.70.70.70.70.70.70.70.80.80.8

us-gaap:HomeEquity, us-gaap:HomeEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value2946290829212919287529272872281427822763
Percentage of FinancingReceivableRecordedInvestmentCurrent5.96.06.06.06.16.36.36.36.26.2

zions:BankcardAndOtherRevolvingPlans, us-gaap:RevolvingCreditFacility



Period End2020-03-312019-12-312019-09-302019-06-30
Value482499490497
Percentage of FinancingReceivableRecordedInvestmentCurrent1.01.01.01.0

zions:CommercialAndIndustrial, zions:CommercialAndIndustrial



Period End2020-03-312019-12-312019-09-302019-06-30
Value15413146651476614820
Percentage of FinancingReceivableRecordedInvestmentCurrent31.030.230.430.6

zions:ConstructionAndOtherConsumerRealEstate, zions:ConstructionAndOtherConsumerRealEstate



Period End2020-03-312019-12-312019-09-302019-06-30
Value629624637640
Percentage of FinancingReceivableRecordedInvestmentCurrent1.31.31.31.3

zions:Municipal, zions:Municipal



Period End2020-03-312019-12-312019-09-302019-06-30
Value2483239321852058
Percentage of FinancingReceivableRecordedInvestmentCurrent5.04.94.54.3

zions:OneThroughFourFamilyResidential, zions:OneThroughFourFamilyResidential



Period End2020-03-312019-12-312019-09-302019-06-30
Value7527753274677411
Percentage of FinancingReceivableRecordedInvestmentCurrent15.215.515.415.3

zions:OwnerOccupied, zions:OwnerOccupied



Period End2020-03-312019-12-312019-09-302019-06-30
Value7999786278757771
Percentage of FinancingReceivableRecordedInvestmentCurrent16.116.216.216.1

zions:Term, zions:Term



Period End2020-03-312019-12-312019-09-302019-06-30
Value9456933394569202
Percentage of FinancingReceivableRecordedInvestmentCurrent19.019.219.419.0

us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:FinancingReceivableRecordedInvestmentNonaccrualStatus

us-gaap:CommercialLoan



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value201147156143152181213229294351375461443468425445242245255262194194192246244268290306
Percentage of FinancingReceivableRecordedInvestmentNonaccrualStatus100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommercialRealEstate



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value15293233384658624047434536315539475463594852678889125140232
Percentage of FinancingReceivableRecordedInvestmentNonaccrualStatus7.519.720.523.125.025.427.227.113.613.411.59.88.16.713.18.819.522.124.922.725.226.935.135.836.646.848.575.7

us-gaap:ConsumerLoan



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value5852576058566171706854564549495257595953606357596267728491
Percentage of FinancingReceivableRecordedInvestmentNonaccrualStatus28.90.038.838.540.636.833.733.330.623.115.414.99.811.210.612.412.824.724.521.122.932.729.630.825.527.627.029.229.8

us-gaap:ConsumerPortfolioSegment



Period End2020-03-312019-12-312019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-312013-12-312012-12-31
Value000000000110000000636791
Percentage of FinancingReceivableRecordedInvestmentNonaccrualStatus0.00.00.00.00.00.00.00.00.00.30.30.00.00.00.00.10.10.132.727.629.8

us-gaap:FinanceLeasesPortfolioSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value101112278881013131413143000
Percentage of FinancingReceivableRecordedInvestmentNonaccrualStatus0.50.00.70.60.71.31.13.33.52.72.32.72.83.13.03.33.21.60.10.10.2

us-gaap:HomeEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value141212121113131414131111910111110899101111119881114
Percentage of FinancingReceivableRecordedInvestmentNonaccrualStatus7.00.08.27.77.78.67.26.66.14.43.12.92.02.42.42.82.43.44.03.53.95.96.05.93.93.73.13.94.6

zions:BankcardAndOtherRevolvingPlans



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value1000000.00.00.00.01000000.0
Percentage of FinancingReceivableRecordedInvestmentNonaccrualStatus0.50.00.00.00.7

zions:CommercialAndIndustrial



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value135110978582
Percentage of FinancingReceivableRecordedInvestmentNonaccrualStatus67.20.066.054.553.9

zions:ConstructionAndOtherConsumerRealEstate



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value00140
Percentage of FinancingReceivableRecordedInvestmentNonaccrualStatus0.00.00.72.60.0

zions:ConstructionandLandDevelopment



Period End2020-03-312019-12-312019-06-302018-12-31
Value0.00.01000000.00.0
Percentage of FinancingReceivableRecordedInvestmentNonaccrualStatus0.00.00.60.0

zions:FinancingReceivablesTotal



Period End2020-03-312019-09-302019-06-302018-12-31
Value274233248246
Percentage of FinancingReceivableRecordedInvestmentNonaccrualStatus136.3158.5159.0161.8

zions:Municipal



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value0.00.00.01000000.01000000.0
Percentage of FinancingReceivableRecordedInvestmentNonaccrualStatus0.00.00.00.60.7

zions:OneThroughFourFamilyResidential



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value4340444442
Percentage of FinancingReceivableRecordedInvestmentNonaccrualStatus21.40.029.928.227.6

zions:OwnerOccupied



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value6565496967
Percentage of FinancingReceivableRecordedInvestmentNonaccrualStatus32.30.033.344.244.1

zions:Term



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value1516293138
Percentage of FinancingReceivableRecordedInvestmentNonaccrualStatus7.50.019.719.925.0

us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:FinancingReceivablesPeriodPastDue

us-gaap:CommercialRealEstatePortfolioSegment, us-gaap:CommercialRealEstatePortfolioSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value0.01000000.00.00.00.00.00.00.00.00.01000000.0
Percentage of FinancingReceivableRecordedInvestmentNonaccrualStatus0.00.00.00.00.00.00.00.00.00.00.2

us-gaap:FinanceLeasesPortfolioSegment, us-gaap:FinanceLeasesPortfolioSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value100111177814
Percentage of FinancingReceivableRecordedInvestmentNonaccrualStatus0.50.00.00.60.70.70.63.33.12.73.2

us-gaap:HomeEquity, us-gaap:HomeEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value87665445655
Percentage of FinancingReceivableRecordedInvestmentNonaccrualStatus4.00.04.13.83.52.62.22.32.61.71.1

zions:CommercialAndIndustrial, zions:CommercialAndIndustrial



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value8854535346
Percentage of FinancingReceivableRecordedInvestmentNonaccrualStatus43.80.036.134.030.3

zions:ConstructionAndOtherConsumerRealEstate, zions:ConstructionAndOtherConsumerRealEstate



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value0.00.01000000.00.00.0
Percentage of FinancingReceivableRecordedInvestmentNonaccrualStatus0.00.00.70.00.0

zions:Municipal, zions:Municipal



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value0.00.00.00.01000000.0
Percentage of FinancingReceivableRecordedInvestmentNonaccrualStatus0.00.00.00.00.7

zions:OneThroughFourFamilyResidential, zions:OneThroughFourFamilyResidential



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value1313131719
Percentage of FinancingReceivableRecordedInvestmentNonaccrualStatus6.50.08.810.912.5

zions:OwnerOccupied, zions:OwnerOccupied



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value4344294748
Percentage of FinancingReceivableRecordedInvestmentNonaccrualStatus21.40.019.730.131.6

zions:Term, zions:Term



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value810232426
Percentage of FinancingReceivableRecordedInvestmentNonaccrualStatus4.00.015.615.417.1

us-gaap:FinancingReceivableRecordedInvestmentPastDue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-31
Value2551991972152461752222492642833162653893093263042862863182982992672733333643313484015376186347328108139111413
Percentage of FinancingReceivableRecordedInvestmentPastDue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:CommercialLoan



Period End2020-03-312019-12-312018-12-312017-12-312016-12-312015-12-312015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value167134110186213170171146141181201182174217275
Percentage of FinancingReceivableRecordedInvestmentPastDue65.567.362.965.769.159.757.254.651.754.255.355.050.154.244.5

us-gaap:CommercialRealEstate



Period End2020-03-312019-12-312018-12-312017-12-312016-12-312015-12-312015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value2916163140516757505873558277181
Percentage of FinancingReceivableRecordedInvestmentPastDue11.48.09.111.013.217.922.621.618.517.620.216.723.719.429.3

us-gaap:CommercialRealEstatePortfolioSegment



Period End2020-03-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value1517961485181
Percentage of FinancingReceivableRecordedInvestmentPastDue0.42.50.62.53.02.15.325.829.3

us-gaap:ConsumerLoan



Period End2020-03-312019-12-312018-12-312017-12-312016-12-312015-12-312015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value594949665464606352475149556388
Percentage of FinancingReceivableRecordedInvestmentPastDue23.124.628.023.317.722.520.223.719.014.114.114.915.915.914.3

us-gaap:ConsumerPortfolioSegment



Period End2020-03-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-31
Value11110005188
Percentage of FinancingReceivableRecordedInvestmentPastDue0.40.50.60.40.20.20.315.614.3

us-gaap:FinanceLeasesPortfolioSegment



Period End2020-03-312019-12-312018-12-312017-12-312016-12-312015-12-312014-12-31
Value1021000
Percentage of FinancingReceivableRecordedInvestmentPastDue0.40.01.10.40.00.20.1

us-gaap:HomeEquity



Period End2020-03-312019-12-312018-12-312017-12-312016-12-312015-12-312015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value1291014981211131213108107
Percentage of FinancingReceivableRecordedInvestmentPastDue4.74.55.74.93.22.94.14.24.93.93.73.22.42.71.3

zions:BankcardAndOtherRevolvingPlans



Period End2020-03-312019-12-312018-12-31
Value634
Percentage of FinancingReceivableRecordedInvestmentPastDue2.41.52.3

zions:CommercialAndIndustrial



Period End2020-03-312019-12-312018-12-31
Value1209568
Percentage of FinancingReceivableRecordedInvestmentPastDue47.147.738.9

zions:ConstructionAndOtherConsumerRealEstate



Period End2020-03-312019-12-312018-12-31
Value0.00.01000000.0
Percentage of FinancingReceivableRecordedInvestmentPastDue0.00.00.6

zions:OneThroughFourFamilyResidential



Period End2020-03-312019-12-312018-12-31
Value403633
Percentage of FinancingReceivableRecordedInvestmentPastDue15.718.118.9

zions:OwnerOccupied



Period End2020-03-312019-12-312018-12-31
Value463940
Percentage of FinancingReceivableRecordedInvestmentPastDue18.019.622.9

zions:Term



Period End2020-03-312019-12-312018-12-31
Value281115
Percentage of FinancingReceivableRecordedInvestmentPastDue11.05.58.6

us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship

us-gaap:HedgedLiabilityFairValueHedge

us-gaap:FairValueHedging



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value54515101024-1022-505
Percentage of HedgedLiabilityFairValueHedge100.0100.0100.0100.0100.0

us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship

us-gaap:HedgedLiabilityFairValueHedgeCumulativeIncreaseDecrease

us-gaap:FairValueHedging



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value4510-24-22-5
Percentage of HedgedLiabilityFairValueHedgeCumulativeIncreaseDecrease100.0100.0100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:HeldToMaturitySecurities

us-gaap:FairValueInputsLevel2



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value585592658695764774751770
Percentage of HeldToMaturitySecurities100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InformationByCategoryOfDebtSecurity

us-gaap:HeldToMaturitySecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss

us-gaap:USStatesAndPoliticalSubdivisions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value10126101710
Percentage of HeldToMaturitySecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss100.00.0100.0100.0100.0100.0100.0100.0

us-gaap:InformationByCategoryOfDebtSecurity

us-gaap:HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLoss

us-gaap:USStatesAndPoliticalSubdivisions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value20126112113
Percentage of HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLoss100.00.0100.0100.0100.0100.0100.0100.0

us-gaap:InformationByCategoryOfDebtSecurity

us-gaap:HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue

us-gaap:USStatesAndPoliticalSubdivisions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value231118310288439524570555
Percentage of HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InformationByCategoryOfDebtSecurity

us-gaap:HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss

us-gaap:USStatesAndPoliticalSubdivisions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value10000143
Percentage of HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss100.00.00.00.00.0100.0100.0100.0

us-gaap:InformationByCategoryOfDebtSecurity

us-gaap:HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue

us-gaap:USStatesAndPoliticalSubdivisions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value21373256132486227263
Percentage of HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InformationByCategoryOfDebtSecurity

us-gaap:HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue

us-gaap:USStatesAndPoliticalSubdivisions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value184554275415438343292
Percentage of HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument

us-gaap:HeldToMaturitySecuritiesFairValue

us-gaap:FairValueInputsLevel2, us-gaap:EstimateOfFairValueFairValueDisclosure



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value587597662698762767734762
Percentage of HeldToMaturitySecuritiesFairValue100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InformationByCategoryOfDebtSecurity

us-gaap:USStatesAndPoliticalSubdivisions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value587597662698762767734762
Percentage of HeldToMaturitySecuritiesFairValue100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:HeldToMaturitySecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312010-09-302010-06-30
Value196.0146.0235.0284.0464.0606.0676.0653.0703.0667.0360.0336.0453.0642.0215.0135.0157.0187.0146.0287.0188.0153.053.072.0126.0157.0207.0251.0102.089.095.089.064.072.050.058.092.053.086.0
Percentage of HeldToMaturitySecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositions100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestBearingDepositsInBanks



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value1225743114963470261959069871778276511671761141014892154303961086558766167917174746463868157817581808180578559785519788776297020511849244689457644684861341065222341005
Percentage of InterestBearingDepositsInBanks100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InvestmentsFairValueDisclosure



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-312016-12-312015-12-312012-03-312011-12-312011-09-302011-06-302010-12-312010-09-302010-06-30
Value14231137251403314672149041473714625151611337276433223323039704084420532953416
Percentage of InvestmentsFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LiabilitiesFairValueDisclosure



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-312016-12-312012-03-312011-12-312011-09-302010-12-312010-09-30
Value158198128186184219233237175133144135133177
Percentage of LiabilitiesFairValueDisclosure100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:FairValueInputsLevel1



Period End2020-03-312019-12-312019-09-302019-06-302018-12-312017-12-312016-12-312016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-312010-09-30
Value120183114174182204125103132129115116128123107958229269292387451981318
Percentage of LiabilitiesFairValueDisclosure75.992.489.193.583.186.171.20.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.033.713.36.39.810.6

us-gaap:FairValueInputsLevel2



Period End2020-03-312019-12-312019-09-302019-06-302018-12-312017-12-312016-12-312016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-312010-09-30
Value3815141237335090547045625047505155556074849111083119121103137
Percentage of LiabilitiesFairValueDisclosure24.17.610.96.516.913.928.80.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.062.282.989.877.877.3

us-gaap:FairValueInputsLevel3



Period End2020-03-312019-12-312019-09-302019-06-302018-12-312017-12-312016-12-312016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302010-12-312010-09-30
Value000000000000000544555555551621
Percentage of LiabilitiesFairValueDisclosure0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.04.13.83.912.412.0

us-gaap:LoansAndLeasesReceivableAllowance



Period End2020-03-312020-01-012019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302008-12-31
Value730497495510503497495480490473518541544544567597608611606596609620604610675736746797813841896925971101010491148123713491440152915631581153114321248686
Percentage of LoansAndLeasesReceivableAllowance100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:CommercialPortfolioSegment



Period End2020-03-312020-01-012019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value413282341348338328331314321329371385393397420446457463454427437442412410440474465479486496510523542547561
Percentage of LoansAndLeasesReceivableAllowance56.656.768.968.267.266.066.965.465.569.671.671.272.273.074.174.775.175.875.071.771.871.368.267.365.164.462.360.159.859.057.056.655.854.253.5

us-gaap:CommercialRealEstatePortfolioSegment



Period End2020-03-312020-01-012019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value12869101109114113110115122104103107116114115120121117113122125131145153187206213244251256276293307334343
Percentage of LoansAndLeasesReceivableAllowance17.513.920.421.422.722.722.224.024.922.019.919.821.321.020.420.320.019.218.820.520.621.224.025.127.728.028.630.630.930.530.931.731.733.132.7

us-gaap:ConsumerPortfolioSegment



Period End2020-03-312020-01-012019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value189146535351565451474044493533303029303746454647444451606870849597102109123
Percentage of LoansAndLeasesReceivableAllowance25.929.410.710.410.111.310.910.69.68.58.59.16.46.15.45.04.94.96.27.87.57.57.87.26.66.98.28.68.610.110.710.510.510.811.7

us-gaap:StatementBusinessSegments

us-gaap:LoansAndLeasesReceivableBeforeFeesGross

us-gaap:CommercialPortfolioSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value2639225388252872510724598241622353923245231402292622539222032155621614216242192821479
Percentage of LoansAndLeasesReceivableBeforeFeesGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsumerPortfolioSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value11794117661173211683114781142711224110121082110730105031028299809693946592558814
Percentage of LoansAndLeasesReceivableBeforeFeesGross44.746.346.446.546.747.347.747.446.846.846.646.346.344.843.842.241.0

us-gaap:LoansAndLeasesReceivableCollateralForSecuredBorrowings



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-31
Value27800215002290023300230002300023400244002450025600254002460022200240002590026000253001940022300224002260022500232002340023500230002240022000220002110020100210002070021100206002090020400
Percentage of LoansAndLeasesReceivableCollateralForSecuredBorrowings100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LoansAndLeasesReceivableDeferredIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value44485152515042656563716977149149148150144141142144147149144141132132128137131133128133126122120120120125131137134130
Percentage of LoansAndLeasesReceivableDeferredIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LoansAndLeasesReceivableGrossCarryingAmount



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value4992748709488354861747606467144581045230450834478044156436834274242649425394250141418406494011340023401804006439739396303919839043382723818737762376653717036873365903727736850369463666636867376693812839105403264138941438
Percentage of LoansAndLeasesReceivableGrossCarryingAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LoansAndLeasesReceivableNetOfDeferredIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-31
Value49927487094883548617476064671445810452304508344780441564368342742426494253942501414184064940113400234018040064397393963039198390433789737756377623766537170368733659037144
Percentage of LoansAndLeasesReceivableNetOfDeferredIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel

us-gaap:LoansAndLeasesReceivableNetReportedAmount

us-gaap:FairValueInputsLevel3



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value4933748343484664821947178463124539144306
Percentage of LoansAndLeasesReceivableNetReportedAmount100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument

us-gaap:FairValueInputsLevel3, us-gaap:EstimateOfFairValueFairValueDisclosure



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value4755747958478194747546197452514445244226
Percentage of LoansAndLeasesReceivableNetReportedAmount96.499.298.798.597.997.797.999.8

us-gaap:LoansAndLeasesReceivableNetReportedAmountCoveredAndNotCovered



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-31
Value4919748214483254811447109462194533044740446104426243615431394219842082419424189340806400433951639414395603945839129389543846138297374753737436769
Percentage of LoansAndLeasesReceivableNetReportedAmountCoveredAndNotCovered100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LoansReceivableHeldForSaleNetNotPartOfDisposalGroup



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302014-12-31
Value1401291411056993618490447153128171160146108149139152132
Percentage of LoansReceivableHeldForSaleNetNotPartOfDisposalGroup100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:Range

us-gaap:LossContingencyEstimateOfPossibleLoss

srt:Maximum



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value35353545505015
Percentage of LossContingencyEstimateOfPossibleLoss100.0100.0100.0100.0100.0100.0100.0

us-gaap:MarketableSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value149761449914971155151598415617155521571215807160791604416177164611435411181103099399823666175297511245624228413440854325415040034052387638813961403940784811496550075095418043544390454845004920
Percentage of MarketableSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NoninterestBearingDepositLiabilities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value2438023576237702294723259236452406724007239092388624011241722441024115227102227621872222762157221557208542052819770196091925718758185661780317311184691729516498161851611014911144751379013653132641407112799123241145311142
Percentage of NoninterestBearingDepositLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingLeaseLiability



Period End2020-03-312019-12-31
Value240246
Percentage of OperatingLeaseLiability100.0100.0

us-gaap:OperatingLeaseWeightedAverageDiscountRatePercent



Period End2020-03-312019-12-31
Value0.03232000.0
Percentage of OperatingLeaseWeightedAverageDiscountRatePercent100.0100.0

us-gaap:OtherAssets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value15691336132913311219934964102489991695089894298311231117901921880908952894845878807926100110691208129014261507149916051721165417561814194020282031227721301660
Percentage of OtherAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredCompensationArrangementWithIndividualPostretirementBenefitsByTypeOfDeferredCompensation

us-gaap:OtherAssetsFairValueDisclosure

us-gaap:DeferredCompensationArrangementWithIndividualByTypeOfCompensationPensionAndOtherPostretirementBenefits



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value9511310810695
Percentage of OtherAssetsFairValueDisclosure100.0100.0100.0100.0100.0

us-gaap:DeferredCompensationArrangementWithIndividualPostretirementBenefitsByTypeOfDeferredCompensation, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument

us-gaap:DeferredCompensationArrangementWithIndividualByTypeOfCompensationPensionAndOtherPostretirementBenefits, us-gaap:FairValueInputsLevel1, us-gaap:WarrantyRightsAndObligationsFairValueOption



Period End2020-03-312019-12-312019-09-302019-06-30
Value95113108106
Percentage of OtherAssetsFairValueDisclosure100.0100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument

us-gaap:FairValueInputsLevel1, us-gaap:Derivative



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value84333449
Percentage of OtherAssetsFairValueDisclosure8.43.52.82.80.04.20.00.0

us-gaap:FairValueInputsLevel2, us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-312019-06-302019-03-31
Value1269
Percentage of OtherAssetsFairValueDisclosure1.124.50.0

us-gaap:FairValueInputsLevel2, zions:DerivativeInterestRateRelatedAndOther



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value193421
Percentage of OtherAssetsFairValueDisclosure20.02.73.71.91.1

us-gaap:FairValueInputsLevel2, zions:InterestRateSwapsForCustomers



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value44714620313940
Percentage of OtherAssetsFairValueDisclosure470.5129.2188.0131.142.1

us-gaap:FairValueInputsLevel3, us-gaap:InterestOnlyStrip



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value1718191917181818181819192020191813
Percentage of OtherAssetsFairValueDisclosure17.915.917.617.90.018.90.00.00.00.00.00.00.00.00.00.00.0

us-gaap:FinancialInstrument

us-gaap:Derivative



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value194421411
Percentage of OtherAssetsFairValueDisclosure20.03.53.71.90.04.20.00.0

us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-312019-06-302019-03-31
Value1269
Percentage of OtherAssetsFairValueDisclosure1.124.50.0

us-gaap:ForeignExchangeContract



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value84333449
Percentage of OtherAssetsFairValueDisclosure8.43.52.82.80.04.20.00.0

us-gaap:InterestOnlyStrip



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302015-12-31
Value1718191917181818181819192020191813
Percentage of OtherAssetsFairValueDisclosure17.915.917.617.90.018.90.00.00.00.00.00.00.00.00.00.00.0

zions:InterestRateSwapsForCustomers



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value44714620313940
Percentage of OtherAssetsFairValueDisclosure470.5129.2188.0131.142.1

us-gaap:OtherInvestments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value91689898210569931046102710541073102910081012973884894850855848851863870865855854848855851852855855874867875865860858858858858866909109910611046
Percentage of OtherInvestments100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherLiabilities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value870899830815841633676657573571638531678941763711562548554540603574486453435501523494489533484507474510466456444467538488467472553536
Percentage of OtherLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DeferredCompensationArrangementWithIndividualPostretirementBenefitsByTypeOfDeferredCompensation

us-gaap:OtherLiabilitiesFairValueDisclosure

us-gaap:DeferredCompensationArrangementWithIndividualByTypeOfCompensationPensionAndOtherPostretirementBenefits



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value9511310810695
Percentage of OtherLiabilitiesFairValueDisclosure100.0100.0100.0100.0100.0

us-gaap:DeferredCompensationArrangementWithIndividualPostretirementBenefitsByTypeOfDeferredCompensation, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument

us-gaap:DeferredCompensationArrangementWithIndividualByTypeOfCompensationPensionAndOtherPostretirementBenefits, us-gaap:FairValueInputsLevel1, us-gaap:WarrantyRightsAndObligationsFairValueOption



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value9511310810695
Percentage of OtherLiabilitiesFairValueDisclosure100.0100.0100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FinancialInstrument

us-gaap:FairValueInputsLevel1, us-gaap:Derivative



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value74222237
Percentage of OtherLiabilitiesFairValueDisclosure7.43.51.91.90.02.10.00.0

us-gaap:FairValueInputsLevel2, us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-31
Value1000000.0
Percentage of OtherLiabilitiesFairValueDisclosure1.1

us-gaap:FairValueInputsLevel2, zions:DerivativeInterestRateRelatedAndOther



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value81111
Percentage of OtherLiabilitiesFairValueDisclosure8.40.90.90.91.1

us-gaap:FairValueInputsLevel2, zions:InterestRateSwapsForCustomers



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value2914131136
Percentage of OtherLiabilitiesFairValueDisclosure30.512.412.010.437.9

us-gaap:FinancialInstrument

us-gaap:Derivative



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312017-12-31
Value8411127
Percentage of OtherLiabilitiesFairValueDisclosure8.43.50.90.90.02.10.0

us-gaap:DesignatedAsHedgingInstrument



Period End2020-03-31
Value1000000.0
Percentage of OtherLiabilitiesFairValueDisclosure1.1

us-gaap:ForeignExchangeContract



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-31
Value74222237
Percentage of OtherLiabilitiesFairValueDisclosure7.43.51.91.90.02.10.00.0

zions:InterestRateSwapsForCustomers



Period End2020-03-312019-12-312019-09-302019-06-302018-12-31
Value2914131136
Percentage of OtherLiabilitiesFairValueDisclosure30.512.412.010.437.9

us-gaap:OtherRealEstate



Period End2020-03-312019-09-302019-03-312018-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value2413121317182727394666808998118144158153203238268299356413414389413304
Percentage of OtherRealEstate100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherRealEstateAndForeclosedAssets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312014-12-312013-12-312012-12-31
Value6845644554343488107184698
Percentage of OtherRealEstateAndForeclosedAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PledgedFinancialInstrumentsNotSeparatelyReportedSecuritiesPledged



Period End2020-03-312019-12-312019-09-302019-06-302018-12-312018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302010-12-312010-09-302010-06-30
Value2000200021002100260020002100230022002100140015001700200023001900160013001400120014001500100015051499144012541200150014001400160016001700
Percentage of PledgedFinancialInstrumentsNotSeparatelyReportedSecuritiesPledged100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PreferredStockValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-30
Value56656656656656656656656656656656656671070970970982882810041004100410041004100410031003100317281301112811231800173723772354232921622056187518061532150215291491
Percentage of PreferredStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:SalesTypeAndDirectFinancingLeasesLeaseReceivable



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value331334332337312327332358371
Percentage of SalesTypeAndDirectFinancingLeasesLeaseReceivable100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:SeniorNotes



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value116511471151114911416376321351351351351351352872872863904004064064244324581454
Percentage of SeniorNotes100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302008-12-312007-12-31
Value7472735375097599758875787553762176447679776177497730763476797626762575077638753074547369732267006586646463326860635060485918648963866983691869136744664764946421585657105694575465295323
Percentage of StockholdersEquityIncludingPortionAttributableToNoncontrolli