COF


Line plots across dimensions of each concept
Tables

Table of contents



us-gaap:CommonStockValue
us-gaap:StatementEquityComponents
us-gaap:SharesIssued

us-gaap:CommonStockSharesIssued

us-gaap:CommonStockSharesOutstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic

us-gaap:EarningsPerShareBasic

us-gaap:EarningsPerShareDiluted

us-gaap:IncomeLossFromContinuingOperationsPerBasicShare

us-gaap:IncomeLossFromContinuingOperationsPerDilutedShare

us-gaap:Revenues
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:ProductOrService
us-gaap:ConsolidationItems, us-gaap:ProductOrService, us-gaap:StatementBusinessSegments
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:ProductOrService

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

us-gaap:IncomeLossFromContinuingOperations
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:IncomeTaxExpenseBenefit
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:FinancialInstrument, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:ComprehensiveIncomeNetOfTax
us-gaap:StatementEquityComponents

us-gaap:NetIncomeLoss
us-gaap:FinancialInstrument, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic

us-gaap:Assets
cof:InvestmentsByConsolidatedAndNonconsolidatedEntities
us-gaap:ConsolidatedEntities
us-gaap:FinancialInstrument, cof:InvestmentsByConsolidatedAndNonconsolidatedEntities
us-gaap:InvestmentType, cof:InvestmentsByConsolidatedAndNonconsolidatedEntities

us-gaap:Liabilities
cof:InvestmentsByConsolidatedAndNonconsolidatedEntities
us-gaap:ConsolidatedEntities
us-gaap:FinancialInstrument, cof:InvestmentsByConsolidatedAndNonconsolidatedEntities
us-gaap:InvestmentType, cof:InvestmentsByConsolidatedAndNonconsolidatedEntities

us-gaap:LiabilitiesAndStockholdersEquity
us-gaap:ConsolidatedEntities

us-gaap:StockholdersEquity
us-gaap:ConsolidatedEntities
us-gaap:StatementEquityComponents

us-gaap:PropertyPlantAndEquipmentGross
us-gaap:PropertyPlantAndEquipmentByType

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment

us-gaap:PropertyPlantAndEquipmentNet

us-gaap:Goodwill
us-gaap:StatementBusinessSegments

us-gaap:IntangibleAssetsNetExcludingGoodwill
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:IntangibleAssetsNetIncludingGoodwill

us-gaap:DeferredTaxAssetsLiabilitiesNet
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:LongTermDebt
us-gaap:LongtermDebtType

us-gaap:StockholdersEquity
us-gaap:ConsolidatedEntities
us-gaap:StatementEquityComponents

us-gaap:CommonStockValue

us-gaap:RetainedEarningsAccumulatedDeficit
cof:CumulativeEffectPeriodOfAdoption
us-gaap:AdjustmentsForNewAccountingPronouncements

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax
cof:CumulativeEffectPeriodOfAdoption
us-gaap:FinancialInstrument, us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:NetCashProvidedByUsedInOperatingActivities

us-gaap:NetIncomeLoss
us-gaap:FinancialInstrument, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome
us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:NetCashProvidedByUsedInInvestingActivities

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment

us-gaap:NetCashProvidedByUsedInFinancingActivities

us-gaap:PaymentsForRepurchaseOfCommonStock
us-gaap:Range, us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:DebtInstrumentInterestRateStatedPercentage
us-gaap:Range, us-gaap:LongtermDebtType
us-gaap:PlanName
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
us-gaap:PlanName
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

us-gaap:ShareBasedCompensation

us-gaap:DeferredTaxAssetsNet
us-gaap:ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItem
us-gaap:UnrecognizedTaxBenefits

us-gaap:DeferredTaxAssetsValuationAllowance

us-gaap:OperatingLeaseRightOfUseAsset

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
us-gaap:ConsolidatedEntities

cof:Amortizationofbasisadjustment

cof:CertainLoansAcquiredinTransferAccountedforasDebtSecuritiesAccretableYieldReclassificationsfromtoNonaccretableDifference
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
cof:FairValueAssetsMeasureonRecurringBasisUnrealizedGainLossinOCI
us-gaap:FinancingReceivablePortfolioSegment
cof:FinancingReceivableAllowanceForCreditLossAdjustmentsOther
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:LoanRestructuringModification
cof:FinancingReceivableModificationsAverageRateReduction
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:GeographicDistribution, us-gaap:LoanRestructuringModification
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:LoanRestructuringModification
us-gaap:LoanRestructuringModification
us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:IncomeStatementLocation
cof:GainLossOnCashFlowHedgesRecognizedInEarnings
us-gaap:FairValueByMeasurementFrequency
cof:GainLossOnFairValueAssetsRecognizedInEarnings
us-gaap:FairValueByMeasurementFrequency
cof:GainLossOnFairValueLoansHeldForInvestmentRecognizedInEarnings
us-gaap:FairValueByMeasurementFrequency
cof:GainLossOnFairValueLoansHeldForSaleRecognizedInEarnings
us-gaap:FairValueByMeasurementFrequency
cof:GainLossOnFairValueOtherAssetsRecognizedInEarnings
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:IncomeStatementLocation
cof:GainorLossonFairValueHedgesRecognizedinNetInterestIncome

cof:InterchangeFeesNet

cof:InterestExpenseOtherBorrowings

cof:InterestExpenseSecuredDebt

cof:InterestExpenseUnsecuredDebt

cof:IssuanceCostForPreferredStockRedeemed

cof:NoninterestIncomeExcludingRevenuefromContractwithCustomer
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

cof:OtherComprehensiveIncomeLossBeforeTaxAttributableToParent

cof:OtherComprehensiveIncomeLossOtherTaxAttributableToParent

cof:OtherComprehensiveIncomeLossSecuritiesTransferredToHeldToMaturityAdjustmentBeforeTaxPortionAttributableToParent

cof:OtherComprehensiveIncomeLossSecuritiesTransferredToHeldToMaturityAdjustmentNetOfTaxPortionAttributableToParent

cof:OtherComprehensiveIncomeLossSecuritiesTransferredToHeldToMaturityAdjustmentTaxPortionAttributableToParent

cof:OtherComprehensiveIncomeOtherNetOfTaxAttributableToParent

cof:OtherthanTemporaryImpairmentLossesDebtSecuritiesAvailableforsaleIntenttoSell

cof:ParticipatingSecuritiesDistributedandUndistributedEarningsLossexcludingPreferredStockDividendsBasic

cof:PaymentsForRedemptionOfPreferredStock

cof:ProceedsfromIssuanceofUnsecuredDebtandLongTermFHLBAdvancesNetofIssuanceCost
us-gaap:IncomeStatementLocation
cof:RealizedGainsonForeignExchangeContractsReclassifiedfromAOCI

cof:RepaymentsofUnsecuredDebtandLongTermFHLBAdvances

cof:ServiceChargesandOtherCustomerRelatedFees
us-gaap:StatementEquityComponents
cof:StockIssuedDuringPeriodSharesNewIssuesandRestrictedStockNetofForfeituresinshares
us-gaap:StatementEquityComponents
cof:StockIssuedDuringPeriodSharesStockOptionsandWarrantsExercisedandRestrictedStockVesting

cof:StockIssuedDuringPeriodValueNewIssuesandRestrictedStockNetofForfeitures
us-gaap:StatementEquityComponents

cof:StockIssuedDuringPeriodValueStockOptionsandWarrantsExercisedandRestrictedStockVesting
us-gaap:StatementEquityComponents

cof:TransferOfToPortfolioLoansAndLeasesToFromHeldForSale

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
us-gaap:StatementEquityComponents

us-gaap:AffordableHousingTaxCreditsAndOtherTaxBenefitsAmount
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:AllowanceForLoanAndLeaseLossRecoveryOfBadDebts
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:AllowanceForLoanAndLeaseLossesAdjustmentsNet
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:BusinessAcquisition
us-gaap:AllowanceForLoanAndLeaseLossesPeriodIncreaseDecrease
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:AllowanceForLoanAndLeaseLossesWriteOffs
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:AllowanceForLoanAndLeaseLossesWriteoffsNet
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization

us-gaap:AmortizationOfIntangibleAssets
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect

us-gaap:CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations

us-gaap:CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAccretableYieldAccretion

us-gaap:CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAccretableYieldDisposalsOfLoans
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:IncomeStatementLocation
us-gaap:ChangeInUnrealizedGainLossOnFairValueHedgingInstruments1
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:IncomeStatementLocation
us-gaap:ChangeInUnrealizedGainLossOnHedgedItemInFairValueHedge1

us-gaap:CommonStockDividendsPerShareDeclared
us-gaap:StatementEquityComponents
us-gaap:CommonStockDividendsShares

us-gaap:CommunicationsAndInformationTechnology

us-gaap:DebtAndEquitySecuritiesGainLoss

us-gaap:DebtSecuritiesAvailableForSaleGainLoss

us-gaap:DebtSecuritiesAvailableForSaleRealizedGain

us-gaap:DebtSecuritiesAvailableForSaleRealizedGainLossExcludingOtherThanTemporaryImpairment

us-gaap:DebtSecuritiesAvailableForSaleRealizedLossExcludingOtherThanTemporaryImpairment

us-gaap:DebtSecuritiesHeldToMaturityTransferAmount

us-gaap:DeferredIncomeTaxExpenseBenefit

us-gaap:DepreciationAndAmortization
us-gaap:DerivativeInstrumentRisk, us-gaap:IncomeStatementLocation
us-gaap:DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet
us-gaap:DerivativeInstrumentRisk, us-gaap:IncomeStatementLocation, us-gaap:UnderlyingAssetClass
us-gaap:IncomeStatementLocation

us-gaap:DividendsCommonStock
us-gaap:StatementEquityComponents

us-gaap:DividendsPreferredStockCash
us-gaap:StatementEquityComponents
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument
us-gaap:FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument
us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument
us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument
us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument
us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument
us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument
us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument
us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInEarnings
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationIssues
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationSettlements
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationTransfersOutOfLevel3
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivableAllowanceForCreditLossPurchasedWithCreditDeteriorationIncrease
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivableAllowanceForCreditLossesRecovery
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivableAllowanceForCreditLossesWriteOffs
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:TypeOfArrangement

us-gaap:FinancingReceivableModificationsPostModificationRecordedInvestment2
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:GeographicDistribution

us-gaap:FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:GeographicDistribution

us-gaap:FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:GeographicDistribution
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:LoanRestructuringModification
us-gaap:FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:LoanRestructuringModification
us-gaap:LoanRestructuringModification
us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:IncomeStatementLocation
us-gaap:GainLossOnFairValueHedgesRecognizedInEarnings

us-gaap:GainLossOnSalesOfLoansNet

us-gaap:GoodwillOtherIncreaseDecrease
us-gaap:StatementBusinessSegments

us-gaap:ImpairedFinancingReceivableInterestIncomeAccrualMethod
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:GeographicDistribution

us-gaap:IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity

us-gaap:IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare

us-gaap:IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare

us-gaap:IncomeTaxesPaid

us-gaap:IncreaseDecreaseInAccruedInterestReceivableNet

us-gaap:IncreaseDecreaseInDeposits

us-gaap:IncreaseDecreaseInInterestPayableNet

us-gaap:IncreaseDecreaseInOtherOperatingAssets

us-gaap:IncreaseDecreaseInOtherOperatingLiabilities

us-gaap:IncrementalCommonSharesAttributableToCallOptionsAndWarrants

us-gaap:IncrementalCommonSharesAttributableToContingentlyIssuableShares

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

us-gaap:InterestAndDividendIncomeOperating

us-gaap:InterestAndDividendIncomeSecurities

us-gaap:InterestAndFeeIncomeLoansAndLeases

us-gaap:InterestExpenseDeposits

us-gaap:InterestIncomeExpenseAfterProvisionForLoanLoss

us-gaap:InterestIncomeExpenseNet
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:DerivativeInstrumentRisk, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents
us-gaap:FinancialInstrument, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:InterestPaidNet

us-gaap:LaborAndRelatedExpense

us-gaap:MarketingExpense

us-gaap:NoninterestExpense
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:NoninterestIncome
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

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

us-gaap:NumberOfOperatingSegments

us-gaap:OccupancyNet

us-gaap:OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentBeforeTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeAvailableforsaleSecuritiesTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeDerivativesQualifyingAsHedgesBeforeTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeDerivativesQualifyingAsHedgesTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentBeforeTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeForeignCurrencyTranslationAdjustmentTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax
us-gaap:FinancialInstrument, us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents

us-gaap:OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent

us-gaap:OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
us-gaap:FinancialInstrument, us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:IncomeStatementLocation
us-gaap:OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIOnDerivativesNetOfTax

us-gaap:OtherComprehensiveIncomeLossTaxPortionAttributableToParent1
us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship
us-gaap:OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax

us-gaap:OtherInterestAndDividendIncome

us-gaap:OtherNoncashIncomeExpense

us-gaap:OtherNoninterestExpense

us-gaap:OtherThanTemporaryImpairmentLossDebtSecuritiesAvailableForSaleRecognizedInEarnings

us-gaap:PaymentsForOriginationAndPurchasesOfLoansHeldForSale

us-gaap:PaymentsForProceedsFromLoansAndLeases

us-gaap:PaymentsForProceedsFromOtherInvestingActivities

us-gaap:PaymentsOfDividendsCommonStock

us-gaap:PaymentsOfDividendsPreferredStockAndPreferenceStock

us-gaap:PaymentsToAcquireAvailableForSaleSecuritiesDebt

us-gaap:PaymentsToAcquireBusinessesNetOfCashAcquired

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

us-gaap:PreferredStockDividendsIncomeStatementImpact

us-gaap:ProceedsFromIssuanceOfCommonStock

us-gaap:ProceedsFromIssuanceOfPreferredStockAndPreferenceStock

us-gaap:ProceedsFromIssuanceOfSecuredDebt

us-gaap:ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities

us-gaap:ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities

us-gaap:ProceedsFromRecoveriesOfLoanPreviouslyChargedOff

us-gaap:ProceedsFromRepaymentsOfOtherDebt

us-gaap:ProceedsFromSaleAndCollectionOfLoansHeldforsale

us-gaap:ProceedsFromSaleOfAvailableForSaleSecurities

us-gaap:ProceedsFromSaleOfAvailableForSaleSecuritiesDebt

us-gaap:ProceedsFromSaleOfLoansAndLeasesHeldForInvestment

us-gaap:ProceedsFromStockPlans

us-gaap:ProfessionalAndContractServicesExpense
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:ProvisionForLoanAndLeaseLosses
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:TypeOfArrangement

us-gaap:ProvisionForLoanLeaseAndOtherLosses
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:ProvisionForLoanLossesExpensed
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax
us-gaap:FinancialInstrument, us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents

us-gaap:RepaymentsOfSecuredDebt

us-gaap:ServicingAssetAtAmortizedValueAmortization1
us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities
us-gaap:ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit

us-gaap:StockIssuedDuringPeriodValueNewIssues
us-gaap:StatementEquityComponents

us-gaap:StockRedeemedOrCalledDuringPeriodValue
us-gaap:StatementEquityComponents

us-gaap:TransferOfPortfolioLoansAndLeasesToHeldForSale1

us-gaap:TreasuryStockValueAcquiredCostMethod
us-gaap:StatementEquityComponents

us-gaap:WeightedAverageNumberDilutedSharesOutstandingAdjustment
us-gaap:FinancingReceivablePortfolioSegment
cof:AdvisedLineofCredit

cof:AmortizedCostOfClosedPrepayableAssetsDesignatedInFairValueHedges

cof:AmortizedCostofClosedPrepaymentAssets
us-gaap:BalanceSheetLocation
cof:CarryingAmountOfAssets
us-gaap:BalanceSheetLocation
cof:CarryingAmountOfLiabilities

cof:CffBalanceSheetLendingCommitmentCarryingValue
us-gaap:CreditFacility
us-gaap:FinancingReceivablePortfolioSegment

cof:CommonEquityTierOneCapitaltoRiskWeightedAssets
dei:LegalEntity
us-gaap:FinancialInstrument
cof:ContinuingInvolvementwithContinuedtobeRecognizedTransferredFinancialAssetsCashBalanceinSpreadandReserveAccounts
us-gaap:FinancialInstrument
cof:ContinuingInvolvementwithContinuedtobeRecognizedTransferredFinancialAssetsLiabilitiesIncurred
us-gaap:FinancialInstrument
cof:ContinuingInvolvementwithDerecognizedTransferredFinancialAssetsCashBalanceofReserveorSpreadAccounts
us-gaap:FinancialInstrument
cof:ContinuingInvolvementwithDerecognizedTransferredFinancialAssetsLiabilitiesIncurred

cof:CustomerLoyaltyProgramLiability

cof:DebtExcludingSecuredDebt

cof:DeferredTaxAssetsLeaseLiabilities

cof:DeferredTaxAssetsOperatingLossCarryforwardsandTaxCreditCarryforward

cof:DeferredTaxAssetsPartnershipInvestments

cof:DeferredTaxAssetsRewardsPrograms

cof:DeferredTaxAssetsSecurityandLoanValuations

cof:DeferredTaxLiabilitiesDerivativeInstruments

cof:DeferredTaxLiabilitiesOriginalIssueDiscount

cof:DeferredTaxLiabilitiesRightofUseAssets

cof:DeferredTaxLiabilitiesSecurityandLoanValuations

cof:DeferredTaxliabilitiesPartnershipInvestments

cof:Deferredtaxliabilitiesloanfeesandexpenses
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cof:DefinedBenefitPlanExpectedFutureBenefitPaymentNext10Years
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cof:DepositswithDefinedMaturities
us-gaap:FairValueByMeasurementBasis

cof:DerivativeCreditRiskValuationAdjustmentDerivativeAssetsLiabilities
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cof:EquitySecuritiesFairValueDisclosure

cof:FinanceChargeAndFeesReserve
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cof:FinanceChargeandFeeReserveReclassification
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cof:FinancingReceivableAllowanceforCreditLossesPercentageofHeldforInvestmentLoans
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cof:FinancingReceivableBeforeAllowanceForCreditLossPastDue
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cof:FinancingReceivableBeforeAllowanceForCreditLossRevolving
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us-gaap:FinancingReceivablePortfolioSegment
cof:FinancingReceivableBeforeAllowanceForCreditLossRevolvingConvertedToTermLoan
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us-gaap:FinancingReceivablePortfolioSegment, us-gaap:GeographicDistribution
cof:FinancingReceivableNotPastDueRevolving
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:GeographicDistribution
cof:FinancingReceivableNotPastDueRevolvingConvertedToTermLoan
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cof:FinancingReceivableOriginatedFiveOrMoreYearsBeforeLatestFiscalYearPastDue
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cof:FinancingReceivableOriginatedFourYearsBeforeLatestFiscalYearPastDue
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cof:FinancingReceivableOriginatedInCurrentFiscalYearPastDue
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cof:FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYearPastDue
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cof:FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYearPastDue
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cof:FinancingReceivableOriginatedTwoYearsBeforeLatestFiscalYearPastDue

cof:FinancingReceivablePastDueAndNotPastDue
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us-gaap:FinancingReceivablePortfolioSegment
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cof:FinancingReceivablePastDueAndNotPastDueExcludingPCILoans
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivablesPeriodPastDue, us-gaap:GeographicDistribution
cof:FinancingReceivablePastDueRevolving
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivablesPeriodPastDue, us-gaap:GeographicDistribution
cof:FinancingReceivablePastDueRevolvingConvertedToTermLoan
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:GeographicDistribution

cof:FinancingReceivablePercent90DaysPastDueandStillAccruing

cof:FinancingReceivablePercentCurrent

cof:FinancingReceivablePercentageofTotalLoan
us-gaap:CreditLossStatus
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cof:FinancingReceivableRevolvingConvertedToTermLoan
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us-gaap:FinancingReceivablePortfolioSegment
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us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:FinancingReceivablesPeriodPastDue
cof:FinancingReceivableRevolvingConvertedToTermLoanPastDue
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:FinancingReceivablesPeriodPastDue
cof:FinancingReceivableRevolvingPastDue
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
cof:ForeclosedPropertyandRepossessedAssetsFairValueDisclosure

cof:HedgedLOLAAssetsCumulativeBasisAdjustment

cof:ImpairedFinancingReceivableRecordedInvestmentNetofRelatedAllowance
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:GeographicDistribution

cof:IntangibleAssetsGrossIncludingGoodwill
us-gaap:FairValueByFairValueHierarchyLevel
cof:InterestPayableFairValueDisclosure
us-gaap:FairValueByMeasurementBasis
us-gaap:FairValueByFairValueHierarchyLevel
cof:InterestReceivableFairValueDisclosure
us-gaap:FairValueByMeasurementBasis
us-gaap:CreditLossStatus, us-gaap:FinancingReceivablePortfolioSegment
cof:InternalRiskPercentage
us-gaap:CreditLossStatus, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancialInstrumentPerformanceStatus, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment
us-gaap:FinancialInstrumentPerformanceStatus, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:InternalCreditAssessment
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:InternalCreditAssessment
us-gaap:ConsolidatedEntities
cof:InvestmentsinSubsidiaries

cof:LetterofCreditIssuedContractualAmountandUnusedCommitmenttoExtendCredit
us-gaap:Range, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:MeasurementInputType, us-gaap:ValuationTechnique
cof:LoansHeldforInvestmentMeasurementInput
us-gaap:TypeOfArrangement
cof:LossSharingAgreementsLoansandLeasesReceivableAllowanceCoveredExpectedReimbursement

cof:MortgageServicingAssetatAmortizedCostGross

cof:NumberofConsumerClassActionCasesFiledforCybersecurityIncident
us-gaap:StatementGeographical
us-gaap:FairValueByFairValueHierarchyLevel
cof:OtherBorrowingsFairValueDisclosure
us-gaap:FairValueByMeasurementBasis

cof:OtherComprehensiveIncomeLossTransferofSecuritiesHeldtoMaturityBeforeTax

cof:OtherComprehensiveIncomeLossTransferofSecuritiesHeldtoMaturityNetofTax
us-gaap:FinancialInstrument, us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents
us-gaap:StatementClassOfStock
cof:PreferredStockDepositarySharesIssued
us-gaap:ConsolidatedEntities
cof:ReceivablesFromSubsidiaries
us-gaap:FairValueByFairValueHierarchyLevel
cof:RestrictedCashandCashEquivalentsFairvalueDisclosure
us-gaap:FairValueByMeasurementBasis
us-gaap:Range, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:MeasurementInputType, us-gaap:ValuationTechnique
cof:RetainedInterestMeasurementInput
us-gaap:FairValueByFairValueHierarchyLevel
cof:SecuredDebtFairValueDisclosure
us-gaap:FairValueByMeasurementBasis

cof:ServicingAssetatAmortizedCostAccumulatedAmortization

cof:TierOneCommonCapitalRequiredforCapitalAdequacytoRiskWeightedAssets
dei:LegalEntity

cof:TieronecapitalunderBaselIIIstandardizedapproach
dei:LegalEntity
us-gaap:FairValueByFairValueHierarchyLevel
cof:UnsecuredDebtFairValueDisclosure
us-gaap:FairValueByMeasurementBasis
us-gaap:InvestmentType
cof:VariableInterestEntitiesnonconsolidatedCarryingamountofAssetsincludedincertaininvestmentstructures
us-gaap:InvestmentType
cof:VariableInterestEntitiesnonconsolidatedCarryingamountofliabilitiesincludedincertaininvestmentstructures
us-gaap:InvestmentType
cof:VariableInterestEntityNonconsolidatedTotalAssets
us-gaap:InvestmentType, cof:InvestmentsByConsolidatedAndNonconsolidatedEntities

us-gaap:AdditionalPaidInCapital

us-gaap:AmortizationMethodQualifiedAffordableHousingProjectInvestments
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:AssetsFairValueDisclosure
us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:AssetsHeldForSaleLongLivedFairValueDisclosure

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax
us-gaap:FinancialInstrument

us-gaap:AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax
us-gaap:FinancialInstrument

us-gaap:AvailableForSaleDebtSecuritiesAmortizedCostBasis
us-gaap:FinancialInstrument

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesNextRollingTwelveMonthsFairValue
us-gaap:FinancialInstrument

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingAfterYearTenFairValue
us-gaap:FinancialInstrument

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingYearSixThroughTenFairValue
us-gaap:FinancialInstrument

us-gaap:AvailableForSaleSecuritiesDebtMaturitiesRollingYearTwoThroughFiveFairValue
us-gaap:FinancialInstrument
us-gaap:BusinessAcquisition
us-gaap:BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedFinancialAssets
us-gaap:BusinessAcquisition, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:Capital
dei:LegalEntity

us-gaap:CapitalToRiskWeightedAssets
dei:LegalEntity
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:CashAndCashEquivalentsFairValueDisclosure
us-gaap:FairValueByMeasurementBasis

us-gaap:CashAndDueFromBanks

us-gaap:CashCashEquivalentsAndFederalFundsSold
us-gaap:ConsolidatedEntities
us-gaap:RestrictedCashAndCashEquivalentsCashAndCashEquivalents
us-gaap:CashReserveDepositRequiredAndMade

us-gaap:CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAccretableYield

us-gaap:CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesCarryingAmountNet

us-gaap:CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesOutstandingBalance

us-gaap:CommonEquityTierOneCapital
dei:LegalEntity
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:CostMethodInvestmentsFairValueDisclosure
us-gaap:FairValueByMeasurementBasis

us-gaap:CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption
us-gaap:FinancialInstrument, us-gaap:StatementEquityComponents
us-gaap:StatementEquityComponents

us-gaap:DebtAndCapitalLeaseObligations

us-gaap:DebtSecuritiesAvailableForSaleAllowanceForCreditLoss
us-gaap:FinancialInstrument

us-gaap:DebtSecuritiesAvailableForSaleAndHeldToMaturity

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger
us-gaap:FinancialInstrument

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss
us-gaap:FinancialInstrument

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months
us-gaap:FinancialInstrument

us-gaap:DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss
us-gaap:FinancialInstrument
us-gaap:Collateral
us-gaap:DebtSecuritiesAvailableForSaleRestricted

us-gaap:DebtSecuritiesAvailableForSaleUnrealizedLossPosition
us-gaap:FinancialInstrument

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

us-gaap:DeferredIncomeTaxLiabilities

us-gaap:DeferredTaxAssetsDeferredIncome

us-gaap:DeferredTaxAssetsDerivativeInstruments

us-gaap:DeferredTaxAssetsGoodwillAndIntangibleAssets

us-gaap:DeferredTaxAssetsGross

us-gaap:DeferredTaxAssetsOther

us-gaap:DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefitsEmployeeCompensation

us-gaap:DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsProvisionForLoanLosses

us-gaap:DeferredTaxLiabilitiesMortgageServicingRights

us-gaap:DeferredTaxLiabilitiesOther

us-gaap:DeferredTaxLiabilitiesPropertyPlantAndEquipment
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAccumulatedBenefitObligation
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAccumulatedOtherComprehensiveIncomeNetGainsLossesBeforeTax
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAmountsRecognizedInBalanceSheet
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent
us-gaap:RetirementPlanType
us-gaap:DefinedBenefitPlanFundedStatusOfPlan

us-gaap:Deposits
us-gaap:ConsolidationItems
us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments
us-gaap:FinancialInstrument
us-gaap:DerecognizedAssetsSecuritizedOrAssetbackedFinancingArrangementAssetsAndAnyOtherFinancialAssetsManagedTogetherPrincipalAmountOutstanding

us-gaap:DerivativeAssetCollateralObligationToReturnCashOffset

us-gaap:DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation, us-gaap:UnderlyingAssetClass
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:HedgingDesignation
us-gaap:HedgingDesignation, us-gaap:UnderlyingAssetClass

us-gaap:DerivativeAssetFairValueGrossLiability

us-gaap:DerivativeAssetFairValueGrossLiabilityAndObligationToReturnCashOffset

us-gaap:DerivativeAssetFairValueOfCollateral
us-gaap:Range, us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:MeasurementInputType, us-gaap:ValuationTechnique
us-gaap:DerivativeAssetLiabilityNetMeasurementInput

us-gaap:DerivativeAssets
us-gaap:FairValueByMeasurementFrequency

us-gaap:DerivativeCollateralObligationToReturnCash

us-gaap:DerivativeCollateralObligationToReturnSecurities

us-gaap:DerivativeCollateralRightToReclaimCash

us-gaap:DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral

us-gaap:DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral

us-gaap:DerivativeLiabilities
us-gaap:FairValueByMeasurementFrequency

us-gaap:DerivativeLiabilityCollateralRightToReclaimCashOffset

us-gaap:DerivativeLiabilityFairValueGrossAsset

us-gaap:DerivativeLiabilityFairValueGrossAssetAndRightToReclaimCashOffset

us-gaap:DerivativeLiabilityFairValueGrossLiabilityIncludingNotSubjectToMasterNettingArrangement
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation, us-gaap:UnderlyingAssetClass
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:HedgingDesignation
us-gaap:HedgingDesignation, us-gaap:UnderlyingAssetClass

us-gaap:DerivativeNotionalAmount
us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:HedgingDesignation
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation
us-gaap:DerivativeInstrumentRisk, us-gaap:HedgingDesignation, us-gaap:UnderlyingAssetClass
us-gaap:HedgingDesignation
us-gaap:HedgingDesignation, us-gaap:UnderlyingAssetClass
us-gaap:AwardType, us-gaap:PlanName
us-gaap:EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedShareBasedAwardsOtherThanOptions
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency, us-gaap:FinancialInstrument
us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:FederalFundsPurchasedAndSecuritiesLoanedOrSoldUnderAgreementsToRepurchaseFairValueDisclosure
us-gaap:FairValueByMeasurementBasis

us-gaap:FederalFundsPurchasedAndSecuritiesSoldUnderAgreementsToRepurchase

us-gaap:FinancingReceivableAllowanceForCreditLosses
us-gaap:AdjustmentsForNewAccountingPronouncements, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment, cof:CumulativeEffectPeriodOfAdoption
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, cof:CumulativeEffectPeriodOfAdoption
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, cof:CumulativeEffectPeriodOfAdoption

us-gaap:FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment
us-gaap:FinancingReceivablePortfolioSegment

us-gaap:FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1
us-gaap:FinancingReceivablePortfolioSegment

us-gaap:FinancingReceivableCollectivelyEvaluatedForImpairment
us-gaap:FinancingReceivablePortfolioSegment

us-gaap:FinancingReceivableIndividuallyEvaluatedForImpairment
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancialInstrumentPerformanceStatus
us-gaap:FinancingReceivableModificationsRecordedInvestment
us-gaap:FinancialInstrumentPerformanceStatus, us-gaap:FinancingReceivablePortfolioSegment

us-gaap:FinancingReceivableNonaccrualNoAllowance
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:GeographicDistribution

us-gaap:FinancingReceivableNonaccrualPercentPastDue1
us-gaap:CreditScoreFico, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableOriginatedFiveOrMoreYearsBeforeLatestFiscalYear
us-gaap:FinancialInstrumentPerformanceStatus, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment
us-gaap:CreditScoreFico, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableOriginatedFourYearsBeforeLatestFiscalYear
us-gaap:FinancialInstrumentPerformanceStatus, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment
us-gaap:CreditScoreFico, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableOriginatedInCurrentFiscalYear
us-gaap:FinancialInstrumentPerformanceStatus, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment
us-gaap:CreditScoreFico, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableOriginatedInFiscalYearBeforeLatestFiscalYear
us-gaap:FinancialInstrumentPerformanceStatus, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment
us-gaap:CreditScoreFico, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableOriginatedThreeYearsBeforeLatestFiscalYear
us-gaap:FinancialInstrumentPerformanceStatus, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment
us-gaap:CreditScoreFico, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableOriginatedTwoYearsBeforeLatestFiscalYear
us-gaap:FinancialInstrumentPerformanceStatus, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment

us-gaap:FinancingReceivablePercentPastDue1
us-gaap:FinancingReceivablesPeriodPastDue

us-gaap:FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:GeographicDistribution

us-gaap:FinancingReceivableRecordedInvestmentCurrent
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:GeographicDistribution

us-gaap:FinancingReceivableRecordedInvestmentNonaccrualStatus
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:GeographicDistribution
us-gaap:CreditScoreFico, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableRevolving
us-gaap:FinancialInstrumentPerformanceStatus, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment

us-gaap:FiniteLivedIntangibleAssetsAccumulatedAmortization
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:GoodwillGross
us-gaap:GuaranteeObligationsByNature
us-gaap:GuaranteeObligationsCurrentCarryingValue
us-gaap:BalanceSheetLocation
us-gaap:HedgedAssetDiscontinuedFairValueHedgeCumulativeIncreaseDecrease
us-gaap:BalanceSheetLocation
us-gaap:HedgedAssetFairValueHedgeCumulativeIncreaseDecrease
us-gaap:BalanceSheetLocation
us-gaap:HedgedLiabilityDiscontinuedFairValueHedgeCumulativeIncreaseDecrease
us-gaap:BalanceSheetLocation
us-gaap:HedgedLiabilityFairValueHedgeCumulativeIncreaseDecrease

us-gaap:HeldToMaturitySecurities

us-gaap:ImpairedFinancingReceivableWithNoRelatedAllowanceRecordedInvestment
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:ImpairedFinancingReceivableWithRelatedAllowanceRecordedInvestment
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:GeographicDistribution

us-gaap:IntangibleAssetsGrossExcludingGoodwill
us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:InterestBearingDepositLiabilities

us-gaap:InterestBearingDepositsInBanks

us-gaap:InterestPayableCurrentAndNoncurrent

us-gaap:InterestReceivable
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVenturesFairValueDisclosure
us-gaap:CreditFacility
us-gaap:LineOfCreditFacilityMaximumBorrowingCapacity
us-gaap:CounterpartyName
us-gaap:LineOfCreditFacilityRemainingBorrowingCapacity

us-gaap:LoansAndLeasesReceivableAllowance
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:LoansAndLeasesReceivableImpairedCommitmentToLend

us-gaap:LoansAndLeasesReceivableNetReportedAmount

us-gaap:LoansHeldForSaleFairValueDisclosure
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByMeasurementBasis
us-gaap:FairValueByMeasurementFrequency
us-gaap:CounterpartyName
us-gaap:LoansPledgedAsCollateral
us-gaap:FairValueByFairValueHierarchyLevel
us-gaap:LoansReceivableFairValueDisclosure
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:FairValueByMeasurementBasis
us-gaap:FairValueByMeasurementFrequency

us-gaap:LoansReceivableHeldForSaleNetNotPartOfDisposalGroup

us-gaap:LongTermDebtAndCapitalLeaseObligations
us-gaap:LongtermDebtType
us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive
us-gaap:LongtermDebtType
us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths
us-gaap:LongtermDebtType
us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive
us-gaap:LongtermDebtType
us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour
us-gaap:LongtermDebtType
us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree
us-gaap:LongtermDebtType
us-gaap:LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo
us-gaap:DebtInstrument, us-gaap:LongtermDebtType
us-gaap:LongtermDebtWeightedAverageInterestRate
us-gaap:LongtermDebtType
us-gaap:LossContingenciesByNatureOfContingency
us-gaap:LossContingencyAccrualAtCarryingValue

us-gaap:NoninterestBearingDepositLiabilities
us-gaap:CreditScoreFico, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:NotesReceivableGross
us-gaap:FinancialInstrumentPerformanceStatus, us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:InternalCreditAssessment
us-gaap:FinancingReceivablePortfolioSegment, us-gaap:GeographicDistribution

us-gaap:OperatingLeaseLiability
us-gaap:IncomeTaxAuthority
us-gaap:OperatingLossCarryforwards

us-gaap:OtherAssets
us-gaap:ConsolidatedEntities
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:OtherAssetsFairValueDisclosure
us-gaap:FairValueByMeasurementFrequency

us-gaap:OtherBorrowings
us-gaap:ConsolidatedEntities

us-gaap:OtherLiabilities
us-gaap:ConsolidatedEntities

us-gaap:OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld
us-gaap:RetirementPlanType
us-gaap:PensionAndOtherPostretirementDefinedBenefitPlansLiabilitiesCurrentAndNoncurrent

us-gaap:PreferredStockIncludingAdditionalPaidInCapitalNetOfDiscount
us-gaap:StatementClassOfStock
us-gaap:StatementClassOfStock
us-gaap:PreferredStockRedemptionPricePerShare

us-gaap:PreferredStockSharesIssued

us-gaap:PreferredStockSharesOutstanding

us-gaap:PreferredStockValue

us-gaap:QualifiedAffordableHousingProjectInvestmentsCommitment

us-gaap:RestrictedCashAndCashEquivalents
us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency
us-gaap:RetainedInterestFairValueDisclosure

us-gaap:SecuredDebt

us-gaap:SecuritiesSoldUnderAgreementsToRepurchase

us-gaap:SecuritiesSoldUnderAgreementsToRepurchaseCollateralRightToReclaimSecurities

us-gaap:SecuritiesSoldUnderAgreementsToRepurchaseFairValueOfCollateral

us-gaap:SecuritiesSoldUnderAgreementsToRepurchaseGross
us-gaap:FinancialInstrument
us-gaap:SecuritizedAssetsAndAnyOtherFinancialAssetsManagedTogetherPrincipalAmountOutstanding

us-gaap:ServicingAssetAtAmortizedValue
us-gaap:AwardType, us-gaap:PlanName
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
us-gaap:AwardType, us-gaap:PlanName
us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue

us-gaap:ShortTermBorrowings
us-gaap:ShortTermDebtType
dei:LegalEntity
us-gaap:StatutoryAccountingPracticesStatutoryAmountAvailableForDividendPayments

us-gaap:SupplementaryLeverageRatio
dei:LegalEntity

us-gaap:TierOneLeverageCapital
dei:LegalEntity

us-gaap:TierOneLeverageCapitalToAverageAssets
dei:LegalEntity

us-gaap:TierOneRiskBasedCapital
dei:LegalEntity

us-gaap:TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets
dei:LegalEntity
dei:LegalEntity
us-gaap:TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets

us-gaap:TierOneRiskBasedCapitalToRiskWeightedAssets
dei:LegalEntity

us-gaap:TimeDepositsAtOrAboveFDICInsuranceLimit

us-gaap:TreasuryStockCommonShares

us-gaap:TreasuryStockCommonValue

us-gaap:UnamortizedLoanCommitmentAndOriginationFeesAndUnamortizedDiscountsOrPremiums
us-gaap:ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItem
us-gaap:UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate

us-gaap:UnsecuredDebt
us-gaap:ConsolidatedEntities
us-gaap:FinancingReceivablePortfolioSegment
us-gaap:UnusedCommitmentsToExtendCredit

us-gaap:VariableInterestEntityConsolidatedCarryingAmountAssets
us-gaap:FinancialInstrument
us-gaap:InvestmentType

us-gaap:VariableInterestEntityConsolidatedCarryingAmountLiabilities
us-gaap:FinancialInstrument
us-gaap:InvestmentType

us-gaap:VariableInterestEntityEntityMaximumLossExposureAmount
us-gaap:FinancialInstrument
us-gaap:InvestmentType

us-gaap:VariableInterestEntityNonconsolidatedCarryingAmountAssets
us-gaap:FinancialInstrument
us-gaap:InvestmentType

us-gaap:VariableInterestEntityNonconsolidatedCarryingAmountLiabilities
us-gaap:FinancialInstrument
us-gaap:InvestmentType

Tables

  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
us-gaap:CommonStockValue █████████████████▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁77777777777777777666666666666666
 us-gaap:SharesIssued us-gaap:StatementEquityComponents us-gaap:CommonStock█▇▇▇▇▆▆▆▆▆▅▅▅▄▄▄▄▃▃▃▃▂▂▂▂▂▁▁676672672671670667666665664661660659658653651650650648647647645643642638637637635634NA631NANA
 us-gaap:SharesIssued us-gaap:StatementEquityComponents us-gaap:PreferredStock█▇█▇▇▇▇▇▇▇▇▇▇▇▅▅▅▅▅▄▂▂▂▂▁▁▁▁5454444444444433333211110000NA0NANA
us-gaap:CommonStockSharesIssued █▇▇▇▇▇▆▆▆▆▆▅▅▄▄▄▄▄▄▄▃▃▃▂▂▂▂▂▂▁▁▁676672672671670667666665664661660659658653651650650648647647645643642638637637635634634631630630
us-gaap:CommonStockSharesOutstanding ▁▁▂▂▂▂▂▂▃▃▃▃▂▂▃▄▄▅▅▆▆▆▇▇▇▇████455456465470469467473478485485484483482480489505514527534542548553558561572572581584583582NANA
us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding 457NA471473471NA480488490NA489488487489505516528536546552557561567577580582591589586NA584583
us-gaap:WeightedAverageNumberOfSharesOutstandingBasic 457NA469470469NA477485486NA484484482483501511523530540545550554559567571573582582581NA578578
us-gaap:EarningsPerShareBasic ▁▆▇█▇▇▇█▇▂▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▄-3.12.26999999999999962.713.262.872.513.013.742.64-2.15999999999999972.161.961.561.471.921.71.851.62.01.522.031.761.892.071.991.461.891.891.811.41000000000000012.030.16
us-gaap:EarningsPerShareDiluted ▁▇▇█▇▇▇█▇▂▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▄-3.12.26000000000000162.693.242.862.52.993.712.62-2.13999999999999972.141.941.541.451.91.691.841.581.981.52.01.731.862.041.961.431.861.871.791.41000000000000012.010.16
us-gaap:IncomeLossFromContinuingOperationsPerBasicShare ▁▆▇▇▇▇▇█▇▂▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▄-3.12.26999999999999962.73.242.872.51999999999999963.013.762.63-1.93000000000000062.221.981.531.471.941.71.861.582.011.52.01.711.972.091.941.51.912.091.941.422.050.33
us-gaap:IncomeLossFromContinuingOperationsPerDilutedShare ▁▆▇▇▇▇▇█▇▂▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▅-3.12.262.683.222.862.512.993.732.61-1.922.21.961.511.451.921.691.851.561.991.481.971.681.942.061.911.461.882.071.921.41000000000000012.030.33
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
us-gaap:Revenues ▇█▇▇▇▇▇▇▆▇▇▆▅▅▅▅▄▄▃▃▃▃▃▂▂▂▃▃▂▃▃▁72497427695971247083701369627192690970136985670465356566646162546220619459005672564758135639546853705544565156385551562457825055
 us-gaap:Revenues us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,cof:CommercialBanking▇▇▇▇▆▆▇█▇█▇█▇▇▇▆▅▄▃▃▃▃▂▂▁▃▁729717707714676687728758723754739752724740711688655626562589575587561545508578511NANANANANA
 us-gaap:Revenues us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,cof:ConsumerBanking▆▇▇█▇▇▆▆▆▇▇▅▄▃▃▂▂▂▂▂▁▂▂▁▁▃▃178318141847187518391848179117841789181518411761171216641673161416111616161716401592164416041601158316631665NANANANANA
 us-gaap:Revenues us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,us-gaap:CreditCard▅█▃▅▄▄▄▁▃▃▁46134824441645694540450344894280441544154305NANANANANANANANANANANANANANANANANANANANANA
us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax ▁▁▁▁▁▁▁▁▁███▇▇▇▇▇▇▇▆▆▇▆▆▆▆▆▆▆▆▇▆937101594296989488785888280470136985670465356566646162546220619459005672564758135639546853705544565156385551562457825055
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidationItems,us-gaap:ProductOrService,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,cof:InterchangeFeesContracts,us-gaap:CreditCard▅▇▆█▆▅▄▄▁688744722757702685661669594NANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidationItems,us-gaap:ProductOrService,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,cof:OtherContractRevenue,cof:CommercialBanking████▁█▁█▁1000000.01000000.01000000.01000000.00.01000000.00.01000000.00.0NANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,cof:ConsumerBanking▁▄▅▅▃▆▇██133151156152145159163170169NANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,us-gaap:CreditCard▆█▅▇▅▄▃▃▁758817737777714695655671596NANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService cof:InterchangeFeesContracts▅█▇█▆▅▄▄▁752811790820758743714723643NANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax us-gaap:ProductOrService cof:ServiceChargesAndOtherCustomerFeesContracts▅▅▅▅▅▁▇██9510511010210025144159161NANANANANANANANANANANANANANANANANANANANANANANA
us-gaap:InterestExpense ▆▇███▇▆▆▅▄▃▃▃▂▂▂▂▁▁▁▁▁▁▁▁▁▁▂▂▂▃▃10841204133813301301122811091045919791720655596562517478461423404400398389390397403416438457481587608615
us-gaap:IncomeLossFromContinuingOperations ▁▆▇▇▇▇▇█▇▂▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▇▆▆▆▄-134011781329161614101264150119171343-8621137104779579310169431018908111885211349701125120411248751130123611448481188193
 us-gaap:IncomeLossFromContinuingOperations us-gaap:ConsolidationItems us-gaap:CorporateNonSegment█▇▇▇▇█▆█▇▁▇█▇▇▇▇█▇▇▇▇▇▇▇▇▇▇11427-64-2245203-225213-46-1774707263-182664934538-7445403031-11-115-83NANANANANA
 us-gaap:IncomeLossFromContinuingOperations us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,cof:ConsumerBanking▁▅██▇▆▇█▇▅▅▅▅▃▄▅▅▄▅▅▅▄▅▆▅▅▆-52283505543468353482539426250316276248120244257249204273291266242289334330279345NANANANANA
us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest ▁▆▇▇▇▆▇█▇▆▇▆▆▆▆▆▆▆▇▆▇▆▇▇▇▆▇▇▇-19031448170420031719124319212492166213081585149011091135151213671470133416481236166314201661178517031352169318581675NANANA
 us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest us-gaap:ConsolidationItems us-gaap:CorporateNonSegment▅▄▃▃▄▃▁█▃▃▄▅▄▃▄▅▅▅▄▂▄▅▅▄▄▃▃1-51-124-131-61-142-328269-148-124-72-29-55-143-45-1428-6-40-217-33-13-29-33-49-174-165NANANANANA
 us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,cof:ConsumerBanking▁▅██▇▆▇█▇▅▆▆▅▃▅▅▅▄▅▆▅▅▆▆▆▆▆-68369659708610460628703556394497434391190383404391319428457416377450520513433536NANANANANA
 us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome,us-gaap:StatementEquityComponents us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome,cof:AccumulatedOtherComprehensiveIncomeLossOtherComponent▅▆▇▅▆▆▆▆▆▆▇▆▆▆▆▅▅▆▆▆▆▆▆█▆▁▅0130111112322220-212111271-120NANANANANA
 us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome,us-gaap:StatementEquityComponents us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome,us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges█▂▄▂▁▅▃▃▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄424-11638-172-220164-23-81431324664767879778360666854473834131016NANANANA
us-gaap:IncomeTaxExpenseBenefit ▁▃▃▃▃▂▄▄▃█▄▄▃▃▄▄▄▄▄▃▄▄▄▄▄▄▄▄▄▃▄▃-563270375387309-21420575319217044844331434249642445242653038452945053658157947752558149437053543
 us-gaap:IncomeTaxExpenseBenefit us-gaap:ConsolidationItems,us-gaap:StatementBusinessSegments us-gaap:OperatingSegments,cof:ConsumerBanking▁▄▇▇▆▅▆▇▆▆█▇▆▄▆▇▆▅▇▇▇▆▇██▇█-168615416514210714616413014418115814370139147142115155166150135161186183154191NANANANANA
 us-gaap:IncomeTaxExpenseBenefit us-gaap:FinancialInstrument,us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome,us-gaap:StatementEquityComponents us-gaap:AvailableforsaleSecurities,us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome,us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss▆▅▆▆▆▅▁▆▆▆█0-5236-5-4702026NANANANANANANANANANANANANANANANANANANANANA
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us-gaap:NetCashProvidedByUsedInInvestingActivities ▇▂▅▅█▄▆▅▇▆▅▅▇▄▅▄▆▁▅▄▇▄▅▅█▇▆▆█▅▄1041-17112-5761-51385013-9747-2256-4297682-3796-7450-63732078-10453-6259-8190-728-20166-5089-75423071-7904-4220-72533386789-797-14135142-6846-7641NA
us-gaap:NetCashProvidedByUsedInFinancingActivities ▅▆▅▃▃▅▃▃▃▅▅▄▂▆▅▅▂█▄▄▃▅▄▅▂▅▂▃▁▆▄510192044065-2705-39457668-2763-804-232452696155-273-7933934049117638-6162202301133452-341573958556042-66545064-7770-3518-12248110082650NA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
us-gaap:NetCashProvidedByUsedInOperatingActivities ▆▅▅▅▆▅▅▅▄▅▅▅▅▄▅▅▅▄▆▅▄▄▅▄▅▁█▅▅▄▆5409412034124226488139403351408016074091306838603163199532932466410211224657235519931603278117613159-52809632283827949274981NA
us-gaap:NetIncomeLoss ▁▆▇▇▇▇▇█▇▂▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▆▄-134011761333162514121261150219061346-971110710368107911005942101392011148631153999108111941154852111711171066843117893
 us-gaap:NetIncomeLoss us-gaap:FinancialInstrument,us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome,us-gaap:StatementEquityComponents us-gaap:AvailableforsaleSecurities,us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome,us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss▆▆▇▇▇▆▁▆▇▆█0-1331218-16-14906142NANANANANANANANANANANANANANANANANANANANANA
 us-gaap:NetIncomeLoss us-gaap:FinancialInstrument,us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome,us-gaap:StatementEquityComponents us-gaap:HeldtomaturitySecurities,us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome,us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss█▆▆▆▆▆▆▆▃▁▁0-6-8-6-6-6-8-8-18-25-26NANANANANANANANANANANANANANANANANANANANANA
 us-gaap:NetIncomeLoss us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome█▂▄▂▁▅▁▃▃▃▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▃▄▃321-10826-125-153104-175-130-337519182225212313101638614-4451NANANANA
 us-gaap:NetIncomeLoss us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome,us-gaap:StatementEquityComponents us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome,cof:AccumulatedOtherComprehensiveIncomeLossOtherComponent▆▇▇▆▇▇▆▇▇▇▇▇▇▇▇▆▅▆█▆▇▇▅█▇▁▆0120110112112120-203012-241-110NANANANANA
 us-gaap:NetIncomeLoss us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome,us-gaap:StatementEquityComponents us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome,us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges█▂▄▂▁▅▃▃▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▄▃▄321-9029-131-166125-18-611192029404849494952374243342924218610NANANANA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
us-gaap:NetCashProvidedByUsedInInvestingActivities ▇▂▅▅█▄▆▅▇▆▅▅▇▄▅▄▆▁▅▄▇▄▅▅█▇▆▆█▅▄1041-17112-5761-51385013-9747-2256-4297682-3796-7450-63732078-10453-6259-8190-728-20166-5089-75423071-7904-4220-72533386789-797-14135142-6846-7641NA
us-gaap:PaymentsToAcquirePropertyPlantAndEquipment ▄▇▆▅▄▅▆▆▅▆█▇▆▇▄▅▃▂▄▁▃▂▄▂▃▅▄▅▆▅▂154256235213183205240224205242293261222271184190134121182761539715512112919617221423620197NA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
us-gaap:NetCashProvidedByUsedInFinancingActivities ▅▆▅▃▃▅▃▃▃▅▅▄▂▆▅▅▂█▄▄▃▅▄▅▂▅▂▃▁▆▄510192044065-2705-39457668-2763-804-232452696155-273-7933934049117638-6162202301133452-341573958556042-66545064-7770-3518-12248110082650NA
us-gaap:PaymentsForRepurchaseOfCommonStock ▃▇▄▁▁▅▄▆▃▁▁▁▂▆█▅▇▅▅▅▄▄▄▇▁▅▃▁▁▁▁386945469265638571802273417121886811946299706266276255635025639413974625812801NA
  2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:Range,us-gaap:DebtInstrument,us-gaap:LongtermDebtType srt:Maximum,cof:FixedUnsecuredSubordinatedDebt,us-gaap:SubordinatedDebt▁▁▁████0.0420.0420.0420.0880.0880.0880.088NANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:Range,us-gaap:DebtInstrument,us-gaap:LongtermDebtType srt:Maximum,cof:FloatingUnsecuredSeniorDebt,us-gaap:SeniorNotes▁▂▅▇█▇▅0.02920.03090.03420.03730.0390.03720.0349NANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:Range,us-gaap:DebtInstrument,us-gaap:LongtermDebtType srt:Minimum,cof:FixedUnsecuredSeniorDebt,us-gaap:SeniorNotes▁▁▁▁███0.0080.0080.0080.0080.01850.01850.0185NANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:Range,us-gaap:DebtInstrument,us-gaap:LongtermDebtType srt:Minimum,cof:FloatingUnsecuredSeniorDebt,us-gaap:SeniorNotes▁▃▅▇█▇▆0.01950.02320.02590.02940.0310.02970.0274NANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:Range,us-gaap:LongtermDebtType srt:Maximum,us-gaap:CapitalLeaseObligations▁█0.09910.1286NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:Range,us-gaap:LongtermDebtType srt:Maximum,us-gaap:FederalHomeLoanBankAdvancesNA0.00.00.00.05360.05360.0536NANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:Range,us-gaap:LongtermDebtType srt:Maximum,us-gaap:SecuredDebt▁▁▁▄█▇▁0.03010.03010.03010.03150.03340.03310.0301NANANANANANANANANANANANANANANANANANANANANANANANANA
 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:Range,us-gaap:LongtermDebtType srt:Minimum,us-gaap:CapitalLeaseObligations▁█0.01630.022NANANANANANANANANANANANANANANANANANANANANANANANANANANANANANA
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 us-gaap:DebtInstrumentInterestRateStatedPercentage us-gaap:Range,us-gaap:LongtermDebtType srt:Minimum,us-gaap:SecuredDebt▁██▄▄▄▄0.01050.01660.01660.01330.01330.01330.0133NANANANANANANANANANANANANANANANANANANANANANANANANA

Common Stock Value

us-gaap:CommonStockValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-31
Value7777777777777777766666666666666665555555554
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Par Or Stated Value Per Share

Shares Issued

us-gaap:StatementEquityComponents

us-gaap:SharesIssued

us-gaap:CommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-312012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-312008-12-312007-12-312006-12-31
Value676672672671670667666665664661660659658653651650650648647647645643642638637637635634631629508508507507504504504504502502501442438419412
Percentage of SharesIssued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:PreferredStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302012-12-312011-12-312010-12-31
Value5454444444444433333211110000000
Percentage of SharesIssued0.80.70.90.70.70.70.70.70.70.70.70.70.70.70.60.50.50.50.50.40.30.30.20.20.10.10.10.10.10.00.0

Common Stock Shares Issued

us-gaap:CommonStockSharesIssued



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312012-03-202011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-31
Value67667267267167066766666566466166065965865365165065064864764764564364263863763763563463463163063062924508508507507504504504504502438
Percentage of CommonStockSharesIssued100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Common Stock Shares Outstanding

us-gaap:CommonStockSharesOutstanding



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value455456465470469467473478485485484483482480489505514527534542548553558561572572581584583582459
Percentage of CommonStockSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Common Stock Shares Authorized

Weighted Average Number Of Diluted Shares Outstanding

us-gaap:WeightedAverageNumberOfDilutedSharesOutstanding



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-09-302009-06-30
Value457471473471480488490489488487489505516528536546552557561567577580582591589586584583513460462460457456455453422
Percentage of WeightedAverageNumberOfDilutedSharesOutstanding100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Weighted Average Number Of Shares Outstanding Basic

us-gaap:WeightedAverageNumberOfSharesOutstandingBasic



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-09-302009-06-30
Value457469470469477485486484484482483501511523530540545550554559567571573582582581578578509456456454453452451449422
Percentage of WeightedAverageNumberOfSharesOutstandingBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Earnings Per Share Basic

us-gaap:EarningsPerShareBasic



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value-3.12.26999999999999962.713.262.872.513.013.742.64-2.15999999999999972.161.961.561.471.921.71.851.62.01.522.031.761.892.071.991.461.891.891.811.41000000000000012.030.162.741.782.02.241.781.341.410.880.88-0.66-0.44
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 End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value-3.12.26000000000000162.693.242.862.52.993.712.62-2.13999999999999972.141.941.541.451.91.691.841.581.981.52.01.731.862.041.961.431.861.871.791.41000000000000012.010.162.721.771.972.211.761.331.40.870.87-0.66-0.44
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

Income Loss From Continuing Operations Per Basic Share

us-gaap:IncomeLossFromContinuingOperationsPerBasicShare



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value-3.12.26999999999999962.73.242.872.51999999999999963.013.762.63-1.93000000000000062.221.981.531.471.941.71.861.582.011.52.01.711.972.091.941.51.912.091.941.422.050.332.941.892.072.271.811.791.590.950.97-0.64-0.38
Percentage of IncomeLossFromContinuingOperationsPerBasicShare100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Income Loss From Continuing Operations Per Diluted Share

us-gaap:IncomeLossFromContinuingOperationsPerDilutedShare



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value-3.12.262.683.222.862.512.993.732.61-1.922.21.961.511.451.921.691.851.561.991.481.971.681.942.061.911.461.882.071.921.41000000000000012.030.332.921.882.042.241.791.781.580.940.96-0.64-0.38
Percentage of IncomeLossFromContinuingOperationsPerDilutedShare100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Revenues

us-gaap:Revenues



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value72497427695971247083701369627192690970136985670465356566646162546220619459005672564758135639546853705544565156385551562457825055
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value12472-11-3428-25-46370-18291002215-4048487454-3-35-244122-31-106-116
Percentage of Revenues1.71.0-0.2-0.50.4-0.4-0.75.1-0.30.41.40.30.2-0.60.70.81.20.9-0.1-0.6-0.00.80.00.4-0.6-1.9-2.1
Percentage of Revenues1.71.0-0.2-0.50.4-0.4-0.75.1-0.30.41.40.30.2-0.60.70.81.20.9-0.1-0.6-0.00.80.00.4-0.6-1.9-2.1
Percentage of Revenues us-gaap:CorporateNonSegment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, cof:CommercialBanking



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value729717707714676687728758723754739752724740711688655626562589575587561545508578511
Percentage of Revenues10.19.710.210.09.59.810.510.510.510.810.611.211.111.311.011.010.510.19.510.410.210.19.910.09.510.49.0
Percentage of Revenues10.19.710.210.09.59.810.510.510.510.810.611.211.111.311.011.010.510.19.510.410.210.19.910.09.510.49.0
Percentage of Revenues us-gaap:OperatingSegments cof:CommercialBanking100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, cof:ConsumerBanking



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value178318141847187518391848179117841789181518411761171216641673161416111616161716401592164416041601158316631665
Percentage of Revenues24.624.426.526.326.026.425.724.825.925.926.426.326.225.325.925.825.926.127.428.928.228.328.429.329.530.029.5
Percentage of Revenues24.624.426.526.326.026.425.724.825.925.926.426.326.225.325.925.825.926.127.428.928.228.328.429.329.530.029.5
Percentage of Revenues us-gaap:OperatingSegments cof:ConsumerBanking100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OperatingSegments, us-gaap:CreditCard



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value46134824441645694540450344894280441544154305
Percentage of Revenues63.665.063.564.164.164.264.559.563.963.061.6
Percentage of Revenues63.665.063.564.164.164.264.559.563.963.061.6
Percentage of Revenues us-gaap:OperatingSegments us-gaap:CreditCard100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Revenue From Contract With Customer Excluding Assessed Tax

us-gaap:RevenueFromContractWithCustomerExcludingAssessedTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-30
Value937101594296989488785888280470136985670465356566646162546220619459005672564758135639546853705544565156385551562457825055
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues12.913.713.513.612.612.612.312.311.6100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-1-2-2-2-1-2-1-20
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.1-0.2-0.2-0.2-0.1-0.2-0.1-0.20.0
Percentage of Revenues-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.00.0
Percentage of Revenues us-gaap:CorporateNonSegment-0.8-2.818.25.9-3.68.02.2-0.5-0.0

us-gaap:ConsolidationItems, us-gaap:ProductOrService

us-gaap:CorporateNonSegment, cof:InterchangeFeesContracts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-1-2-1-2-1-2-1-10
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax-0.1-0.2-0.1-0.2-0.1-0.2-0.1-0.10.0
Percentage of Revenues-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.00.0
Percentage of Revenues us-gaap:CorporateNonSegment cof:InterchangeFeesContracts0.00.00.00.00.00.00.00.00.0

us-gaap:CorporateNonSegment, cof:ServiceChargesAndOtherCustomerFeesContracts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value0.00.0-1000000.00.00.00.00.0-1000000.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.0-0.10.00.00.00.0-0.10.0
Percentage of Revenues0.00.0-0.00.00.00.00.0-0.00.0
Percentage of Revenues us-gaap:CorporateNonSegment cof:ServiceChargesAndOtherCustomerFeesContracts0.00.00.00.00.00.00.00.00.0

us-gaap:ConsolidationItems, us-gaap:ProductOrService, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, cof:InterchangeFeesContracts, cof:CommercialBanking



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value151615131110887
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax1.61.61.61.31.21.10.90.90.9
Percentage of Revenues0.20.20.20.20.20.10.10.10.1
Percentage of Revenues us-gaap:OperatingSegments cof:InterchangeFeesContracts cof:CommercialBanking0.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, cof:InterchangeFeesContracts, cof:ConsumerBanking



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value505354524650464742
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.35.25.75.45.15.65.45.35.2
Percentage of Revenues0.70.70.80.70.60.70.70.70.6
Percentage of Revenues us-gaap:OperatingSegments cof:InterchangeFeesContracts cof:ConsumerBanking0.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, cof:InterchangeFeesContracts, us-gaap:CreditCard



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value688744722757702685661669594
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax73.473.376.678.178.577.277.075.973.9
Percentage of Revenues9.510.010.410.69.99.89.59.38.6
Percentage of Revenues us-gaap:OperatingSegments cof:InterchangeFeesContracts us-gaap:CreditCard0.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, cof:OtherContractRevenue, cof:CommercialBanking



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value1000000.01000000.01000000.01000000.00.01000000.00.01000000.00.0
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.10.10.10.10.00.10.00.10.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.0
Percentage of Revenues us-gaap:OperatingSegments cof:OtherContractRevenue cof:CommercialBanking0.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, cof:OtherContractRevenue, cof:ConsumerBanking



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value192526262425272829
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax2.02.52.82.72.72.83.13.23.6
Percentage of Revenues0.30.30.40.40.30.40.40.40.4
Percentage of Revenues us-gaap:OperatingSegments cof:OtherContractRevenue cof:ConsumerBanking0.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, cof:OtherContractRevenue, us-gaap:CreditCard



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value707315201210-622
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax7.57.21.62.11.31.1-0.70.20.2
Percentage of Revenues1.01.00.20.30.20.1-0.10.00.0
Percentage of Revenues us-gaap:OperatingSegments cof:OtherContractRevenue us-gaap:CreditCard0.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, cof:ServiceChargesAndOtherCustomerFeesContracts, cof:CommercialBanking



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value313235282523333532
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax3.33.23.72.92.82.63.84.04.0
Percentage of Revenues0.40.40.50.40.40.30.50.50.5
Percentage of Revenues us-gaap:OperatingSegments cof:ServiceChargesAndOtherCustomerFeesContracts cof:CommercialBanking0.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, cof:ServiceChargesAndOtherCustomerFeesContracts, cof:ConsumerBanking



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value64737674750117123127
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax6.87.28.17.68.40.013.613.915.8
Percentage of Revenues0.91.01.11.01.10.01.71.71.8
Percentage of Revenues us-gaap:OperatingSegments cof:ServiceChargesAndOtherCustomerFeesContracts cof:ConsumerBanking0.00.00.00.00.00.00.00.00.0

us-gaap:OperatingSegments, cof:ServiceChargesAndOtherCustomerFeesContracts, us-gaap:CreditCard



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value000002-600
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax0.00.00.00.00.00.2-0.70.00.0
Percentage of Revenues0.00.00.00.00.00.0-0.10.00.0
Percentage of Revenues us-gaap:OperatingSegments cof:ServiceChargesAndOtherCustomerFeesContracts us-gaap:CreditCard0.00.00.00.00.00.00.00.00.0

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, cof:CommercialBanking



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value474951423635414339
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax5.04.85.44.34.03.94.84.94.9
Percentage of Revenues0.60.70.70.60.50.50.60.60.6
Percentage of Revenues us-gaap:OperatingSegments cof:CommercialBanking6.46.87.25.95.35.15.65.75.4

us-gaap:OperatingSegments, cof:ConsumerBanking



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value133151156152145159163170169
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax14.214.916.615.716.217.919.019.321.0
Percentage of Revenues1.82.02.22.12.02.32.32.42.4
Percentage of Revenues us-gaap:OperatingSegments cof:ConsumerBanking7.58.38.48.17.98.69.19.59.4

us-gaap:OperatingSegments, us-gaap:CreditCard



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value758817737777714695655671596
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax80.980.578.280.279.978.476.376.174.1
Percentage of Revenues10.511.010.610.910.19.99.49.38.6
Percentage of Revenues us-gaap:OperatingSegments us-gaap:CreditCard16.416.916.717.015.715.414.615.713.5

us-gaap:ProductOrService

cof:InterchangeFeesContracts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value752811790820758743714723643
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax80.379.983.984.684.883.883.282.080.0
Percentage of Revenues10.410.911.411.510.710.610.310.19.3
Percentage of Revenues cof:InterchangeFeesContracts0.00.00.00.00.00.00.00.00.0

cof:OtherContractRevenue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value909942473636213131
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax9.69.84.54.94.04.12.43.53.9
Percentage of Revenues1.21.30.60.70.50.50.30.40.4
Percentage of Revenues cof:OtherContractRevenue0.00.00.00.00.00.00.00.00.0

cof:ServiceChargesAndOtherCustomerFeesContracts



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value9510511010210025144159161
Percentage of RevenueFromContractWithCustomerExcludingAssessedTax10.110.311.710.511.22.816.818.020.0
Percentage of Revenues1.31.41.61.41.40.42.12.22.3
Percentage of Revenues cof:ServiceChargesAndOtherCustomerFeesContracts0.00.00.00.00.00.00.00.00.0

Sales Revenue Net

Interest Expense

us-gaap:InterestExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value10841204133813301301122811091045919791720655596562517478461423404400398389390397403416438457481587608615565552563612706738801641697772857
Percentage of InterestExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues15.016.219.218.718.417.515.914.513.311.310.39.89.18.68.07.67.46.86.87.17.06.76.97.37.57.57.88.18.710.410.512.20.00.00.00.00.00.00.00.00.00.00.0

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

us-gaap:ForeignExchangeContract, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges



Period End2020-03-312019-12-312019-09-302019-03-312018-12-312018-09-30
Value-1000000.0-1000000.0-1000000.00.00.00.0
Percentage of InterestExpense-0.1-0.1-0.10.00.00.0
Percentage of Revenues-0.0-0.0-0.00.00.00.0
Percentage of Revenues us-gaap:ForeignExchangeContract us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges0.00.00.00.00.00.0

Interest Expense Long Term Debt

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

Income Loss From Continuing Operations

us-gaap:IncomeLossFromContinuingOperations



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value-134011781329161614101264150119171343-862113710477957931016943101890811188521134970112512041124875113012361144848118819315058659451032818812719403437229-83
Percentage of IncomeLossFromContinuingOperations100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-18.515.919.122.719.918.021.626.719.4-12.316.315.612.212.115.715.116.414.718.915.020.116.720.022.020.915.820.021.920.615.120.53.80.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value11427-64-2245203-225213-46-1774707263-182664934538-7445403031-11-115-83
Percentage of IncomeLossFromContinuingOperations-8.52.3-4.8-1.43.216.1-15.011.1-3.4205.86.26.97.9-2.32.66.89.15.03.4-8.74.04.12.72.6-1.0-13.1-7.3
Percentage of Revenues1.60.4-0.9-0.30.62.9-3.23.0-0.7-25.31.01.11.0-0.30.41.01.50.70.6-1.30.80.70.50.6-0.2-2.1-1.5
Percentage of Revenues us-gaap:CorporateNonSegment91.937.5581.864.7160.7-812.0489.157.6255.6-6117.270.0327.3420.045.054.2133.3125.783.3-1266.7211.4-2250.090.93000.0140.935.5108.571.6

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, cof:CommercialBanking



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value-41116415415714618720424225613817914621317919113867106137172155169182171137195162
Percentage of IncomeLossFromContinuingOperations30.713.911.69.710.414.813.612.619.1-16.015.713.926.822.618.814.66.611.712.320.213.717.416.214.212.222.314.3
Percentage of Revenues-5.72.22.22.22.12.72.93.43.72.02.62.23.32.73.02.21.11.72.33.02.72.93.23.12.63.52.9
Percentage of Revenues us-gaap:OperatingSegments cof:CommercialBanking-56.422.921.822.021.627.228.031.935.418.324.219.429.424.226.920.110.216.924.429.227.028.832.431.427.033.731.7

us-gaap:OperatingSegments, cof:ConsumerBanking



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value-52283505543468353482539426250316276248120244257249204273291266242289334330279345
Percentage of IncomeLossFromContinuingOperations3.924.038.033.633.227.932.128.131.7-29.027.826.431.215.124.027.324.522.524.434.223.524.925.727.729.431.930.5
Percentage of Revenues-0.73.87.37.66.65.06.97.56.23.64.54.13.81.83.84.14.03.34.65.14.74.25.16.16.15.06.1
Percentage of Revenues us-gaap:OperatingSegments cof:ConsumerBanking-2.915.627.329.025.419.126.930.223.813.817.215.714.57.214.615.915.512.616.917.716.714.718.020.920.816.820.7

us-gaap:OperatingSegments, us-gaap:CreditCard



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-9917047349387515211040923707524572
Percentage of IncomeLossFromContinuingOperations74.059.855.258.053.341.269.348.152.6-60.850.3
Percentage of Revenues-13.79.510.513.210.67.414.912.810.27.58.2
Percentage of Revenues us-gaap:OperatingSegments us-gaap:CreditCard-21.514.616.620.516.511.623.221.616.011.913.3

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

us-gaap:IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value-19031448170420031719124319212492166213081585149011091135151213671470133416481236166314201661178517031352169318581675
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-26.319.524.528.124.317.727.634.624.118.722.722.217.017.323.421.923.621.527.921.829.424.429.532.631.724.430.033.030.2

us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value1-51-124-131-61-142-328269-148-124-72-29-55-143-45-1428-6-40-217-33-13-29-33-49-174-165
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest-0.1-3.5-7.3-6.5-3.5-11.4-17.110.8-8.9-9.5-4.5-1.9-5.0-12.6-3.0-1.01.9-0.4-2.4-17.6-2.0-0.9-1.7-1.8-2.9-12.9-9.7
Percentage of Revenues0.0-0.7-1.8-1.8-0.9-2.0-4.73.7-2.1-1.8-1.0-0.4-0.8-2.2-0.7-0.20.5-0.1-0.7-3.8-0.6-0.2-0.5-0.6-0.9-3.1-2.9
Percentage of Revenues us-gaap:CorporateNonSegment0.8-70.81127.3385.3-217.9568.0713.072.7822.2-427.6-72.0-131.8-366.7357.5-93.8-29.237.8-11.11333.3620.01650.0-29.5-2900.0-150.0158.1164.2142.2

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, cof:CommercialBanking



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value-539214200205190244266315334217282231335281301217105166215270243262284266213303252
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest28.314.811.710.211.119.613.812.620.116.617.815.530.224.819.915.97.112.413.021.814.618.517.114.912.522.414.9
Percentage of Revenues-7.42.92.92.92.73.53.84.44.83.14.03.45.14.34.73.51.72.73.64.84.34.55.04.94.05.54.5
Percentage of Revenues us-gaap:OperatingSegments cof:CommercialBanking-73.929.828.328.728.135.536.541.646.228.838.230.746.338.042.331.516.026.538.345.842.344.650.648.841.952.449.3

us-gaap:OperatingSegments, cof:ConsumerBanking



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value-68369659708610460628703556394497434391190383404391319428457416377450520513433536
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest3.625.538.735.335.537.032.728.233.530.131.429.135.316.725.329.626.623.926.037.025.026.527.129.130.132.031.7
Percentage of Revenues-0.95.09.59.98.66.69.09.88.05.67.16.56.02.95.96.56.35.27.38.17.46.58.09.59.67.89.5
Percentage of Revenues us-gaap:OperatingSegments cof:ConsumerBanking-3.820.335.737.833.224.935.139.431.121.727.024.622.811.422.925.024.319.726.527.926.122.928.132.532.426.032.2

us-gaap:OperatingSegments, us-gaap:CreditCard



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-1297916969122198068113551205920821878
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest68.263.356.961.057.054.870.548.455.462.855.4
Percentage of Revenues-17.912.313.917.113.89.719.516.813.311.712.6
Percentage of Revenues us-gaap:OperatingSegments us-gaap:CreditCard-28.119.021.926.721.615.130.228.220.818.620.4

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, cof:AccumulatedOtherComprehensiveIncomeLossOtherComponent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value0130111112322220-212111271-120
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest-0.00.10.20.00.10.10.10.00.10.20.20.10.20.20.10.0-0.10.10.10.10.10.10.10.40.1-0.90.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0-0.00.00.00.00.00.00.00.10.0-0.20.0
Percentage of Revenues us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome cof:AccumulatedOtherComprehensiveIncomeLossOtherComponent0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value424-11638-172-220164-23-81431324664767879778360666854473834131016
Percentage of IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest-22.3-8.02.2-8.6-12.813.2-1.2-0.30.82.42.03.15.86.75.25.85.26.23.65.34.13.82.82.12.01.00.60.9
Percentage of Revenues5.8-1.60.5-2.4-3.12.3-0.3-0.10.20.40.50.71.01.21.21.31.21.31.01.21.20.90.80.70.60.20.20.3
Percentage of Revenues us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Income Loss From Continuing Operations Before Income Taxes Foreign

Income Tax Expense Benefit

us-gaap:IncomeTaxExpenseBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value-563270375387309-2142057531921704484433143424964244524265303845294505365815794775255814943705354335337045035433536924417014692-58
Percentage of IncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-7.83.65.45.44.4-0.36.08.04.630.96.46.64.85.27.76.87.36.99.06.89.47.79.510.610.88.69.310.38.96.69.30.90.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value-113-78-60-109-106-345-10356-1021650-142-101-118-125-71-78-65-51-78-143-78-53-59-64-38-59-82
Percentage of IncomeTaxExpenseBenefit20.1-28.9-16.0-28.2-34.31642.9-24.59.7-32.076.0-31.7-22.8-37.6-36.5-14.3-18.4-14.4-12.0-14.7-37.2-14.7-11.8-11.0-11.0-6.6-12.4-15.6
Percentage of Revenues-1.6-1.1-0.9-1.5-1.5-4.9-1.50.8-1.523.5-2.0-1.5-1.8-1.9-1.1-1.2-1.0-0.8-1.3-2.5-1.4-0.9-1.0-1.2-0.7-1.1-1.5
Percentage of Revenues us-gaap:CorporateNonSegment-91.1-108.3545.5320.6-378.61380.0223.915.1566.75689.7-142.0-459.1-786.7312.5-147.9-162.5-87.8-94.42600.0408.63900.0-120.5-5900.0-290.9122.655.770.7

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, cof:CommercialBanking



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value-1285046484457627378791038512210211079386078988893102957610890
Percentage of IncomeTaxExpenseBenefit22.718.512.312.414.2-271.414.812.724.53.623.019.238.929.822.218.68.414.114.725.516.620.719.016.413.122.617.1
Percentage of Revenues-1.80.70.70.70.60.80.91.01.11.11.51.31.91.61.71.30.61.01.31.71.61.61.81.71.41.91.6
Percentage of Revenues us-gaap:OperatingSegments cof:CommercialBanking-17.67.06.56.76.58.38.59.610.810.513.911.316.913.815.511.55.89.613.916.615.315.818.217.415.018.717.6

us-gaap:OperatingSegments, cof:ConsumerBanking



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value-168615416514210714616413014418115814370139147142115155166150135161186183154191
Percentage of IncomeTaxExpenseBenefit2.831.941.142.646.0-509.534.828.540.86.640.435.745.520.528.034.731.427.029.243.228.430.030.032.031.632.336.4
Percentage of Revenues-0.21.22.22.32.01.52.12.31.92.12.62.42.21.12.22.42.31.92.62.92.72.32.93.43.42.83.4
Percentage of Revenues us-gaap:OperatingSegments cof:ConsumerBanking-0.94.78.38.87.75.88.29.27.37.99.89.08.44.28.39.18.87.19.610.19.48.210.011.611.69.311.5

us-gaap:OperatingSegments, us-gaap:CreditCard



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-306212235283229160315282213297306
Percentage of IncomeTaxExpenseBenefit54.478.562.773.174.1-761.975.049.066.813.768.3
Percentage of Revenues-4.22.93.44.03.22.34.53.93.14.24.4
Percentage of Revenues us-gaap:OperatingSegments us-gaap:CreditCard-6.64.45.36.25.03.67.06.64.86.77.1

us-gaap:FinancialInstrument, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:AvailableforsaleSecurities, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value0-5236-5-4702026
Percentage of IncomeTaxExpenseBenefit-0.0-1.90.50.81.923.8-11.20.00.60.05.8
Percentage of Revenues0.0-0.10.00.00.1-0.1-0.70.00.00.00.4
Percentage of Revenues us-gaap:AvailableforsaleSecurities us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:HeldtomaturitySecurities, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value0-3-2-2-2-3-2-2-6-12-14
Percentage of IncomeTaxExpenseBenefit-0.0-1.1-0.5-0.5-0.614.3-0.5-0.3-1.9-0.6-3.1
Percentage of Revenues0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.1-0.2-0.2
Percentage of Revenues us-gaap:HeldtomaturitySecurities us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, cof:AccumulatedOtherComprehensiveIncomeLossOtherComponent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value001000100021010001-110-1430-10
Percentage of IncomeTaxExpenseBenefit-0.00.00.30.00.0-0.00.20.00.00.00.40.20.00.30.00.00.00.2-0.20.30.0-0.20.70.50.0-0.20.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0-0.00.00.0-0.00.10.10.0-0.00.0
Percentage of Revenues us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome cof:AccumulatedOtherComprehensiveIncomeLossOtherComponent0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value103-269-41-5439-5-2312121724282930283123242520181413546
Percentage of IncomeTaxExpenseBenefit-18.3-9.62.4-10.6-17.5-185.7-1.2-0.30.90.62.73.87.68.25.87.16.27.34.36.24.74.43.42.42.21.00.81.0
Percentage of Revenues1.4-0.40.1-0.6-0.80.6-0.1-0.00.00.20.20.30.40.40.40.50.50.50.40.40.40.30.30.30.20.10.10.1
Percentage of Revenues us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Comprehensive Income Net Of Tax

us-gaap:ComprehensiveIncomeNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-03-312009-12-312009-09-302009-03-31
Value1191991161624552015187514181712874-127511681287825-27988512241588446136967813711128893153313168261070-1488008011609190148766211081013804728402849261
Percentage of ComprehensiveIncomeNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues16.413.323.234.528.426.720.423.812.7-18.216.719.212.6-4.213.719.625.57.223.212.024.319.415.828.024.514.918.9-2.614.414.227.83.80.00.00.00.00.00.00.00.00.0

us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value2531283830603614-84-194-472-3046125115-1070-120282575-474255-185218129-188339162
Percentage of ComprehensiveIncomeNetOfTax212.517.533.829.932.7-5.9-11.3-54.023.85.219.51.8383.5-13.623.036.2-106.318.6-27.315.911.4-21.122.112.3
Percentage of Revenues34.94.111.78.58.8-1.2-2.7-6.8-4.30.93.70.2-16.3-1.94.59.2-7.74.3-3.33.92.2-3.36.23.0
Percentage of Revenues us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value-13401333162514121261150219061346-971110710368107911005942101392011148631153999108111941154
Percentage of ComprehensiveIncomeNetOfTax-112.582.566.270.167.3105.9111.3154.076.294.880.598.2-283.5113.677.063.8206.381.4127.384.188.6121.177.987.7
Percentage of Revenues-18.519.222.819.918.021.626.519.5-13.815.815.512.412.015.615.116.314.918.915.220.417.219.221.821.5
Percentage of Revenues us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Income Loss

us-gaap:NetIncomeLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value-134011761333162514121261150219061346-97111071036810791100594210139201114863115399910811194115485211171117106684311789314038139111016803608636375394223-108
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-18.515.819.222.819.918.021.626.519.5-13.815.815.512.412.015.615.116.314.918.915.220.417.219.221.821.515.419.819.819.215.020.41.80.00.00.00.00.00.00.00.00.00.00.0

us-gaap:FinancialInstrument, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:AvailableforsaleSecurities, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value0-1331218-16-14906142
Percentage of NetIncomeLoss-0.0-1.10.20.71.3-1.3-9.90.00.4-0.13.8
Percentage of Revenues0.0-0.20.00.20.3-0.2-2.10.00.10.00.6
Percentage of Revenues us-gaap:AvailableforsaleSecurities us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:HeldtomaturitySecurities, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value0-6-8-6-6-6-8-8-18-25-26
Percentage of NetIncomeLoss-0.0-0.5-0.6-0.4-0.4-0.5-0.5-0.4-1.32.6-2.3
Percentage of Revenues0.0-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.3-0.4-0.4
Percentage of Revenues us-gaap:HeldtomaturitySecurities us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value321-10826-125-153104-175-130-337519182225212313101638614-4451
Percentage of NetIncomeLoss-24.0-9.22.0-7.7-10.88.2-11.7-0.70.00.33.30.52.32.32.22.72.12.51.21.21.40.30.70.51.2-5.20.40.1
Percentage of Revenues4.4-1.50.4-1.8-2.21.5-2.5-0.20.0-0.00.50.10.30.30.30.40.30.40.20.20.30.10.10.10.3-0.80.10.0
Percentage of Revenues us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, cof:AccumulatedOtherComprehensiveIncomeLossOtherComponent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value0120110112112120-203012-241-110
Percentage of NetIncomeLoss-0.00.10.20.00.10.10.00.10.1-0.20.10.10.20.10.20.0-0.20.00.30.00.10.2-0.20.30.1-1.30.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0-0.00.00.10.00.00.0-0.00.10.0-0.20.0
Percentage of Revenues us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome cof:AccumulatedOtherComprehensiveIncomeLossOtherComponent0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value321-9029-131-166125-18-611192029404849494952374243342924218610
Percentage of NetIncomeLoss-24.0-7.72.2-8.1-11.89.9-1.2-0.30.8-2.01.82.84.96.14.95.24.85.73.34.93.73.42.72.01.80.90.50.9
Percentage of Revenues4.4-1.20.4-1.8-2.31.8-0.3-0.10.20.30.30.40.60.70.80.80.80.80.60.70.80.60.50.40.40.10.10.2
Percentage of Revenues us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Income Loss Available To Common Stockholders Basic

us-gaap:NetIncomeLossAvailableToCommonStockholdersBasic



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value-142010411270153313481173144018141284-104310479487527109628719708481079830111597410561177113683510991100104882511739213968139111016803608636375394-277-172
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 Revenues-19.614.018.221.519.016.720.725.218.6-14.915.014.111.510.814.913.915.613.718.314.619.716.818.721.521.215.119.419.518.914.720.31.80.00.00.00.00.00.00.00.00.00.00.0

Net Income Loss Available To Common Stockholders Diluted

Assets

us-gaap:Assets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-31
Value396878390365378810373619373191372538362909363989362857365693361402350593348549357033345061339117330346334048313700310510306224308854300202298317290500297048289888296542300163312918301989296572294481206019200148199753199300197503196933197489200707169646165913
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cof:InvestmentsByConsolidatedAndNonconsolidatedEntities

us-gaap:VariableInterestEntityNotPrimaryBeneficiary



Period End2020-03-312019-12-31
Value51395127
Percentage of Assets1.31.3
Percentage of Assets1.31.3
Percentage of Assets us-gaap:VariableInterestEntityNotPrimaryBeneficiary100.0100.0

us-gaap:VariableInterestEntityPrimaryBeneficiary



Period End2020-03-312019-12-31
Value3283535519
Percentage of Assets8.39.1
Percentage of Assets8.39.1
Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary100.0100.0

us-gaap:ConsolidatedEntities

srt:ParentCompany



Period End2019-12-312018-12-312017-12-31
Value803367308865092
Percentage of Assets20.619.617.8
Percentage of Assets20.619.617.8
Percentage of Assets srt:ParentCompany100.0100.0100.0

us-gaap:FinancialInstrument, cof:InvestmentsByConsolidatedAndNonconsolidatedEntities

cof:SecuritizationRelatedVariableInterestEntities, us-gaap:VariableInterestEntityNotPrimaryBeneficiary



Period End2020-03-312019-12-31
Value5966
Percentage of Assets0.00.0
Percentage of Assets0.00.0
Percentage of Assets cof:SecuritizationRelatedVariableInterestEntities us-gaap:VariableInterestEntityNotPrimaryBeneficiary100.0100.0

cof:SecuritizationRelatedVariableInterestEntities, us-gaap:VariableInterestEntityPrimaryBeneficiary



Period End2020-03-312019-12-31
Value3062233394
Percentage of Assets7.78.6
Percentage of Assets7.78.6
Percentage of Assets cof:SecuritizationRelatedVariableInterestEntities us-gaap:VariableInterestEntityPrimaryBeneficiary100.0100.0

us-gaap:CollateralizedAutoLoans, us-gaap:VariableInterestEntityPrimaryBeneficiary



Period End2020-03-312019-12-31
Value33512282
Percentage of Assets0.80.6
Percentage of Assets0.80.6
Percentage of Assets us-gaap:CollateralizedAutoLoans us-gaap:VariableInterestEntityPrimaryBeneficiary100.0100.0

us-gaap:CreditCardReceivables, us-gaap:VariableInterestEntityPrimaryBeneficiary



Period End2020-03-312019-12-31
Value2727131112
Percentage of Assets6.98.0
Percentage of Assets6.98.0
Percentage of Assets us-gaap:CreditCardReceivables us-gaap:VariableInterestEntityPrimaryBeneficiary100.0100.0

us-gaap:ResidentialMortgage, us-gaap:VariableInterestEntityNotPrimaryBeneficiary



Period End2020-03-312019-12-31
Value5966
Percentage of Assets0.00.0
Percentage of Assets0.00.0
Percentage of Assets us-gaap:ResidentialMortgage us-gaap:VariableInterestEntityNotPrimaryBeneficiary100.0100.0

us-gaap:InvestmentType, cof:InvestmentsByConsolidatedAndNonconsolidatedEntities

cof:AffordableHousingEntities, us-gaap:VariableInterestEntityNotPrimaryBeneficiary



Period End2020-03-312019-12-31
Value45944600
Percentage of Assets1.21.2
Percentage of Assets1.21.2
Percentage of Assets cof:AffordableHousingEntities us-gaap:VariableInterestEntityNotPrimaryBeneficiary100.0100.0

cof:AffordableHousingEntities, us-gaap:VariableInterestEntityPrimaryBeneficiary



Period End2020-03-312019-12-31
Value246236
Percentage of Assets0.10.1
Percentage of Assets0.10.1
Percentage of Assets cof:AffordableHousingEntities us-gaap:VariableInterestEntityPrimaryBeneficiary100.0100.0

cof:InvestmentCompaniesProvidingCapitaltoLowIncomeandRuralCommunities, us-gaap:VariableInterestEntityPrimaryBeneficiary



Period End2020-03-312019-12-31
Value19671889
Percentage of Assets0.50.5
Percentage of Assets0.50.5
Percentage of Assets cof:InvestmentCompaniesProvidingCapitaltoLowIncomeandRuralCommunities us-gaap:VariableInterestEntityPrimaryBeneficiary100.0100.0

cof:NonsecuritizationRelatedVariableInterestEntities, us-gaap:VariableInterestEntityNotPrimaryBeneficiary



Period End2020-03-312019-12-31
Value50805061
Percentage of Assets1.31.3
Percentage of Assets1.31.3
Percentage of Assets cof:NonsecuritizationRelatedVariableInterestEntities us-gaap:VariableInterestEntityNotPrimaryBeneficiary100.0100.0

cof:NonsecuritizationRelatedVariableInterestEntities, us-gaap:VariableInterestEntityPrimaryBeneficiary



Period End2020-03-312019-12-31
Value22132125
Percentage of Assets0.60.5
Percentage of Assets0.60.5
Percentage of Assets cof:NonsecuritizationRelatedVariableInterestEntities us-gaap:VariableInterestEntityPrimaryBeneficiary100.0100.0

us-gaap:OtherInvestments, us-gaap:VariableInterestEntityNotPrimaryBeneficiary



Period End2020-03-312019-12-31
Value486502
Percentage of Assets0.10.1
Percentage of Assets0.10.1
Percentage of Assets us-gaap:OtherInvestments us-gaap:VariableInterestEntityNotPrimaryBeneficiary100.0100.0

Liabilities

us-gaap:Liabilities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-31
Value340048332354320575317852319710320870312271314063313654316963311248301456300509309519296848291009282639286764266015263851260494263801256184254502247699255304248138255501258867272419262317259380257531176353170770171072171750170962170872172219176333143056139301
Percentage of Liabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets85.785.184.685.185.786.186.086.386.486.786.186.086.286.786.085.885.685.884.885.085.185.485.385.385.385.985.686.286.287.186.987.587.585.685.385.686.286.686.887.287.984.384.0

cof:InvestmentsByConsolidatedAndNonconsolidatedEntities

us-gaap:VariableInterestEntityNotPrimaryBeneficiary



Period End2020-03-312019-12-31
Value12751289
Percentage of Liabilities0.40.4
Percentage of Assets0.30.3
Percentage of Assets us-gaap:VariableInterestEntityNotPrimaryBeneficiary24.825.1

us-gaap:VariableInterestEntityPrimaryBeneficiary



Period End2020-03-312019-12-31
Value1723618201
Percentage of Liabilities5.15.5
Percentage of Assets4.34.7
Percentage of Assets us-gaap:VariableInterestEntityPrimaryBeneficiary52.551.2

us-gaap:ConsolidatedEntities

srt:ParentCompany



Period End2019-12-312018-12-312017-12-31
Value223252142016362
Percentage of Liabilities6.76.75.2
Percentage of Assets5.75.74.5
Percentage of Assets srt:ParentCompany27.829.325.1

us-gaap:FinancialInstrument, cof:InvestmentsByConsolidatedAndNonconsolidatedEntities

cof:SecuritizationRelatedVariableInterestEntities, us-gaap:VariableInterestEntityPrimaryBeneficiary



Period End2020-03-312019-12-31
Value1714918125
Percentage of Liabilities5.05.5
Percentage of Assets4.34.6
Percentage of Assets cof:SecuritizationRelatedVariableInterestEntities us-gaap:VariableInterestEntityPrimaryBeneficiary56.054.3

us-gaap:CollateralizedAutoLoans, us-gaap:VariableInterestEntityPrimaryBeneficiary



Period End2020-03-312019-12-31
Value29692012
Percentage of Liabilities0.90.6
Percentage of Assets0.70.5
Percentage of Assets us-gaap:CollateralizedAutoLoans us-gaap:VariableInterestEntityPrimaryBeneficiary88.688.2

us-gaap:CreditCardReceivables, us-gaap:VariableInterestEntityPrimaryBeneficiary



Period End2020-03-312019-12-31
Value1418016113
Percentage of Liabilities4.24.8
Percentage of Assets3.64.1
Percentage of Assets us-gaap:CreditCardReceivables us-gaap:VariableInterestEntityPrimaryBeneficiary52.051.8

us-gaap:InvestmentType, cof:InvestmentsByConsolidatedAndNonconsolidatedEntities

cof:AffordableHousingEntities, us-gaap:VariableInterestEntityNotPrimaryBeneficiary



Period End2020-03-312019-12-31
Value12751289
Percentage of Liabilities0.40.4
Percentage of Assets0.30.3
Percentage of Assets cof:AffordableHousingEntities us-gaap:VariableInterestEntityNotPrimaryBeneficiary27.828.0

cof:AffordableHousingEntities, us-gaap:VariableInterestEntityPrimaryBeneficiary



Period End2020-03-312019-12-31
Value187
Percentage of Liabilities0.00.0
Percentage of Assets0.00.0
Percentage of Assets cof:AffordableHousingEntities us-gaap:VariableInterestEntityPrimaryBeneficiary7.33.0

cof:NonsecuritizationRelatedVariableInterestEntities, us-gaap:VariableInterestEntityNotPrimaryBeneficiary



Period End2020-03-312019-12-31
Value12751289
Percentage of Liabilities0.40.4
Percentage of Assets0.30.3
Percentage of Assets cof:NonsecuritizationRelatedVariableInterestEntities us-gaap:VariableInterestEntityNotPrimaryBeneficiary25.125.5

cof:NonsecuritizationRelatedVariableInterestEntities, us-gaap:VariableInterestEntityPrimaryBeneficiary



Period End2020-03-312019-12-31
Value8776
Percentage of Liabilities0.00.0
Percentage of Assets0.00.0
Percentage of Assets cof:NonsecuritizationRelatedVariableInterestEntities us-gaap:VariableInterestEntityPrimaryBeneficiary3.93.6

Liabilities And Stockholders Equity

us-gaap:LiabilitiesAndStockholdersEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-31
Value396878390365378810373619373191372538362909363989362857365693361402350593348549357033345061339117330346334048313700310510306224308854300202298317290500297048289888296542300163312918301989296572294481206019200148199753199300197503196933197489200707169646165913
Percentage of LiabilitiesAndStockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities

srt:ParentCompany



Period End2019-12-312018-12-312017-12-31
Value803367308865092
Percentage of LiabilitiesAndStockholdersEquity20.619.617.8
Percentage of Assets20.619.617.8
Percentage of Assets srt:ParentCompany100.0100.0100.0

Stockholders Equity

us-gaap:StockholdersEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-312008-12-312007-12-312006-12-31
Value568305801158235557675348151668506384992649203487305015449137480404751448213481084770747284476854665945730450534401843815428014174441750410414129640499396723719236950296662937828681275502654126061252702437426589261922533226747266122429425235
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets14.314.915.414.914.313.914.013.713.613.313.914.013.813.314.014.214.414.215.215.014.914.614.714.714.714.114.413.813.812.913.112.512.514.414.714.413.813.413.212.812.115.70.00.00.016.00.00.0

us-gaap:ConsolidatedEntities

srt:ParentCompany



Period End2019-12-312018-12-312017-12-31
Value580115166848730
Percentage of StockholdersEquity100.0100.0100.0
Percentage of Assets14.913.913.3
Percentage of Assets srt:ParentCompany72.270.774.9

us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-312008-12-312007-12-312006-12-31
Value36791156453170-660-1263-1877-1793-1599-926-622-683-934-949121241-41-616-142-397-212-430-559-371-710-872-839-7924737397813502531692914422452484694671588257-399-852-1221315266
Percentage of StockholdersEquity6.52.00.80.3-1.2-2.4-3.7-3.6-3.2-1.9-1.2-1.4-1.9-2.00.30.5-0.1-1.3-0.3-0.9-0.5-1.0-1.3-0.8-1.7-2.1-2.0-1.91.11.82.00.90.70.61.01.50.90.91.81.80.70.30.2-1.6-3.2-4.61.31.1
Percentage of Assets0.90.30.10.0-0.2-0.3-0.5-0.5-0.4-0.3-0.2-0.2-0.3-0.30.00.1-0.0-0.2-0.0-0.1-0.1-0.1-0.2-0.1-0.2-0.3-0.3-0.30.20.20.30.10.10.10.10.20.10.10.20.20.10.00.00.00.0-0.70.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-312008-12-312007-12-312006-12-31
Value334503298033826322623216032040319783186831779316563152631413313263115730439297862970929655295942906327939278692727227210266052652626426263392625626188252652521725136192741923419188191411908419059190291899018954189281889117348172781586015333
Percentage of StockholdersEquity58.956.958.157.960.162.063.263.864.665.062.963.965.265.663.161.962.362.762.162.361.161.962.062.162.263.563.364.263.664.763.767.868.065.065.566.969.571.973.175.377.971.372.374.664.964.965.360.8
Percentage of Assets8.48.48.98.68.68.68.88.88.88.78.79.09.08.78.88.89.08.99.49.49.19.09.19.19.28.99.18.98.78.48.48.58.59.49.69.69.69.79.79.69.511.20.00.00.010.40.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-312008-12-312007-12-312006-12-31
Value777777777777777776666666666666666555555555554444
Percentage of StockholdersEquity0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:PreferredStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302011-12-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-312008-12-312007-12-312006-12-31
Value000000000000000000000000000000853000000003115309600
Percentage of StockholdersEquity0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.02.20.00.00.00.00.00.00.00.011.611.60.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.30.00.00.00.00.00.00.00.00.01.90.00.0
Percentage of Assets us-gaap:PreferredStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-312008-12-312007-12-312006-12-31
Value36552403403947638386370303587534883336263199630700319463108630326297662924528479278082704526407255402492523973231622227021259204041973118804178761685316054149051484113462130911228711399104069730896984171072710374100041030010621112679760
Percentage of StockholdersEquity64.369.567.868.869.269.468.967.465.063.063.763.363.162.660.759.258.357.255.454.754.553.252.650.849.748.947.345.843.341.640.540.140.245.444.642.841.439.237.335.534.540.339.639.538.539.946.438.7
Percentage of Assets9.210.310.410.39.99.69.69.28.88.48.88.98.78.38.58.48.48.18.48.28.17.87.77.57.36.96.86.36.05.45.35.05.06.56.56.25.75.34.94.54.26.30.00.00.06.40.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TreasuryStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-312008-12-312007-12-312006-12-31
Value-16858-16472-15527-15058-15056-14991-14353-13782-12980-12707-12703-12686-12685-12467-11599-10405-9776-8806-8180-7553-6928-6365-5863-5300-4359-4320-3574-3316-3315-3287-3287-3286-3286-3244-3243-3241-3240-3202-3202-3200-3198-3180-3172-3169-3168-3165-3153-128
Percentage of StockholdersEquity-29.7-28.4-26.7-27.0-28.2-29.0-28.3-27.6-26.4-26.1-25.3-25.8-26.4-26.2-24.1-21.6-20.5-18.6-17.2-16.2-15.1-14.1-13.3-12.1-10.2-10.3-8.6-8.1-8.0-8.1-8.3-8.8-8.9-10.9-11.0-11.3-11.8-12.1-12.3-12.7-13.1-12.0-12.1-12.5-11.8-11.9-13.0-0.5
Percentage of Assets-4.2-4.2-4.1-4.0-4.0-4.0-4.0-3.8-3.6-3.5-3.5-3.6-3.6-3.5-3.4-3.1-3.0-2.6-2.6-2.4-2.3-2.1-2.0-1.8-1.5-1.5-1.2-1.1-1.1-1.1-1.1-1.1-1.1-1.6-1.6-1.6-1.6-1.6-1.6-1.6-1.6-1.90.00.00.0-1.90.00.0
Percentage of Assets us-gaap:TreasuryStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Land

Noncurrent Assets

Property Plant And Equipment Gross

us-gaap:PropertyPlantAndEquipmentGross



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value9188872782647487699968827183649352275004
Percentage of PropertyPlantAndEquipmentGross100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets2.42.32.32.12.12.22.42.12.52.5

us-gaap:PropertyPlantAndEquipmentByType

cof:FurnitureAndEquipment



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value2218201819011834173517301874
Percentage of PropertyPlantAndEquipmentGross24.123.123.024.524.825.126.1
Percentage of Assets0.60.50.50.50.50.60.6
Percentage of Assets cof:FurnitureAndEquipment0.00.00.00.00.00.00.0

us-gaap:BuildingAndBuildingImprovements



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value3903399433022958267425772388
Percentage of PropertyPlantAndEquipmentGross42.545.840.039.538.237.433.2
Percentage of Assets1.01.10.90.80.80.80.8
Percentage of Assets us-gaap:BuildingAndBuildingImprovements0.00.00.00.00.00.00.0

us-gaap:ConstructionInProgress



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value689482902591514467720
Percentage of PropertyPlantAndEquipmentGross7.55.510.97.97.36.810.0
Percentage of Assets0.20.10.20.20.20.20.2
Percentage of Assets us-gaap:ConstructionInProgress0.00.00.00.00.00.00.0

us-gaap:Land



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value382386406423458552569
Percentage of PropertyPlantAndEquipmentGross4.24.44.95.66.58.07.9
Percentage of Assets0.10.10.10.10.10.20.2
Percentage of Assets us-gaap:Land0.00.00.00.00.00.00.0

us-gaap:SoftwareAndSoftwareDevelopmentCosts



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value1996184717531681161815561632
Percentage of PropertyPlantAndEquipmentGross21.721.221.222.523.122.622.7
Percentage of Assets0.50.50.50.50.50.50.5
Percentage of Assets us-gaap:SoftwareAndSoftwareDevelopmentCosts0.00.00.00.00.00.00.0

Accumulated Depreciation Depletion And Amortization Property Plant And Equipment

us-gaap:AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value4810453642313812341531973344290624792255
Percentage of AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.21.21.21.11.01.01.10.91.21.1

Property Plant And Equipment Net

us-gaap:PropertyPlantAndEquipmentNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-31
Value4336437843114243420541914149409540554033395538253727367535613556354235843629360236843685375237643807383937923766373635873519355630622748278527542739274927222730273527352313
Percentage of PropertyPlantAndEquipmentNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets1.11.11.11.11.11.11.11.11.11.11.11.11.11.01.01.01.11.11.21.21.21.21.21.31.31.31.31.31.21.11.21.21.01.31.41.41.41.41.41.41.41.61.4

Goodwill

us-gaap:Goodwill



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-31
Value14645146531462414545145461454414513145311453614533145321452414521145191449314495144921448013983139841397813978139701397713974139781390613900139001390413901138641359513592135931359613597135911359313588135891359611964
Percentage of Goodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.73.83.93.93.93.94.04.04.04.04.04.14.24.14.24.34.44.34.54.54.64.54.74.74.84.74.84.74.64.44.64.74.66.66.86.86.86.96.96.96.88.07.2

us-gaap:StatementBusinessSegments

cof:CommercialBanking



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value4920492049204884488448844884490149014901490149014901490149014901489748834384438443844384438343844383438843184318431843184318
Percentage of Goodwill33.633.633.633.633.633.633.733.733.733.733.733.733.833.833.833.833.833.731.431.431.431.431.431.431.431.431.131.131.131.131.8
Percentage of Assets1.21.31.31.31.31.31.31.31.41.31.41.41.41.41.41.41.51.51.41.41.41.41.51.51.51.51.51.51.41.42.1
Percentage of Assets cof:CommercialBanking0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

cof:ConsumerBanking



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-31
Value4645464546444599460046004600460046004600460046004600460046004600460046004600459845984593458445844585458545864586458645834583
Percentage of Goodwill31.731.731.831.631.631.631.731.731.631.731.731.731.731.731.731.731.731.832.932.932.932.932.832.832.832.833.033.033.033.033.7
Percentage of Assets1.21.21.21.21.21.21.31.31.31.31.31.31.31.31.31.41.41.41.51.51.51.51.51.51.61.51.61.51.51.52.2
Percentage of Assets cof:ConsumerBanking0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CreditCard



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302017-12-312016-12-312015-12-31
Value5080508850605062506250605029503250184997
Percentage of Goodwill34.734.734.634.834.834.834.734.634.634.5
Percentage of Assets1.31.31.31.41.41.41.41.41.41.5
Percentage of Assets us-gaap:CreditCard0.00.00.00.00.00.00.00.00.00.0

Intangible Assets Net Excluding Goodwill

us-gaap:IntangibleAssetsNetExcludingGoodwill



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value1561741811942232542893343784214815426036657618489371041100511101212131614401849
Percentage of IntangibleAssetsNetExcludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.10.10.10.10.10.10.10.10.20.20.20.20.30.30.30.30.40.40.40.50.6

us-gaap:FiniteLivedIntangibleAssetsByMajorClass

us-gaap:CustomerRelationships



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-06-302015-03-312014-12-31
Value546888107129150166198230261305349393436490552618689841912972
Percentage of IntangibleAssetsNetExcludingGoodwill34.639.148.655.257.859.157.459.360.862.063.464.465.265.664.465.166.066.275.875.273.9
Percentage of Assets0.00.00.00.00.00.00.00.10.10.10.10.10.10.10.10.20.20.20.30.30.3
Percentage of Assets us-gaap:CustomerRelationships0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:OtherIntangibleAssets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value102106938794103119128136144153162172183212222229243113118125142
Percentage of IntangibleAssetsNetExcludingGoodwill65.460.951.444.842.240.641.238.336.034.231.829.928.527.527.926.224.423.311.210.610.310.8
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.10.10.10.10.10.00.00.00.0
Percentage of Assets us-gaap:OtherIntangibleAssets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Finite Lived Intangible Assets Net

Intangible Assets Net Including Goodwill

us-gaap:IntangibleAssetsNetIncludingGoodwill



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312012-12-312012-09-302012-06-302011-12-31
Value148011482714805147391476914798148021486514914149541501315066151241518415254153431542915521149881509415190152941541015547156801582716475166631682514202
Percentage of IntangibleAssetsNetIncludingGoodwill100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets3.73.83.93.94.04.04.14.14.14.14.24.34.34.34.44.54.74.64.84.95.05.05.15.25.45.35.35.55.76.9

Deferred Tax Assets Liabilities Net

us-gaap:DeferredTaxAssetsLiabilitiesNet



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value1720214528644310366233323666293823162715
Percentage of DeferredTaxAssetsLiabilitiesNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.40.60.81.21.11.11.20.91.11.4

Long Term Debt

us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:LongTermDebt

cof:FixedUnsecuredSeniorDebt, 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
Value24610233022345724076230272329023531248242292022776208152117419628175461830316924168371655917539160971662415174150559612
Percentage of LongTermDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets6.26.06.26.46.26.36.56.86.36.25.86.05.64.95.35.05.15.05.65.25.44.95.03.2
Percentage of Assets cof:FixedUnsecuredSeniorDebt us-gaap:SeniorNotes0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

cof:FixedUnsecuredSubordinatedDebt, us-gaap:SubordinatedDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value474344754530475246254543441344504486453345584556452845324700424942004080265426102655263025992670
Percentage of LongTermDebt19.319.219.319.720.119.518.817.919.619.921.921.523.125.825.725.124.924.615.116.216.017.317.327.8
Percentage of Assets1.21.11.21.31.21.21.21.21.21.21.31.31.31.31.41.31.31.20.80.80.90.90.90.9
Percentage of Assets cof:FixedUnsecuredSubordinatedDebt us-gaap:SubordinatedDebt0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

cof:FloatingUnsecuredSeniorDebt, 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
Value269626952695299429932993334736463645344630472748224913539986996991198158012801280880880852
Percentage of LongTermDebt11.011.611.512.413.012.914.214.715.915.114.613.011.57.75.54.14.27.29.08.07.75.85.88.9
Percentage of Assets0.70.70.70.80.80.80.91.01.00.90.80.80.60.40.30.20.20.40.50.40.40.30.30.3
Percentage of Assets cof:FloatingUnsecuredSeniorDebt us-gaap:SeniorNotes0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

cof:UnsecuredSeniorDebt, 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
Value273062599726152270702602026283268782847026565262222386223922218771889919301176231753617757191191737717904160541593510464
Percentage of LongTermDebt111.0111.6111.5112.4113.0112.9114.2114.7115.9115.1114.6113.0111.5107.7105.5104.1104.2107.2109.0108.0107.7105.8105.8108.9
Percentage of Assets6.96.76.97.27.07.17.47.87.37.26.66.86.35.35.65.25.35.36.15.65.85.25.33.5
Percentage of Assets cof:UnsecuredSeniorDebt us-gaap:SeniorNotes0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:LongtermDebtType

cof:FHLBAdvanceCapitalLeaseObligationandGPMH



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312016-12-31
Value921039393105370631188321894017211
Percentage of LongTermDebt0.40.40.40.40.51.62.70.81.439.398.1
Percentage of Assets0.00.00.00.00.00.10.20.10.12.44.8
Percentage of Assets cof:FHLBAdvanceCapitalLeaseObligationandGPMH0.00.00.00.00.00.00.00.00.00.00.0

cof:Otherborrowings



Period End2019-12-312018-12-31
Value71039420
Percentage of LongTermDebt30.540.4
Percentage of Assets1.82.5
Percentage of Assets cof:Otherborrowings0.00.0

cof:SeniorAndSubordinatedNotes



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value320493047230682318223064530826312913292031051307552842028478264052343124001218722173621837217731998720559186841853413134
Percentage of LongTermDebt130.2130.8130.8132.2133.1132.4133.0132.6135.5135.0136.5134.5134.5133.5131.1129.2129.1131.9124.1124.2123.7123.1123.1136.6
Percentage of Assets8.17.88.18.58.28.38.69.08.68.47.98.17.66.67.06.46.66.56.96.46.76.06.24.4
Percentage of Assets cof:SeniorAndSubordinatedNotes0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CapitalLeaseObligations



Period End2020-03-312019-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302014-12-31
Value921034846323233333333240
Percentage of LongTermDebt0.40.40.20.20.20.20.20.20.20.20.10.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CapitalLeaseObligations0.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:FederalHomeLoanBankAdvances



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value00012515012486092114242817179162962014712898200984304101061070106910711016
Percentage of LongTermDebt0.00.00.00.01.12.10.00.037.810.012.497.989.0119.076.6121.424.562.86.47.07.110.6
Percentage of Assets0.00.00.00.00.10.10.00.02.40.60.74.84.75.93.96.01.43.30.30.30.40.3
Percentage of Assets us-gaap:FederalHomeLoanBankAdvances0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:SecuredDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302013-12-31
Value17141178081891016959192731830718649196491866520010185281882618411161301491316166156561378512717116241050810289
Percentage of LongTermDebt69.776.480.670.483.778.679.379.281.487.994.4107.3100.695.388.697.689.385.676.576.669.8107.0
Percentage of Assets4.34.65.04.55.24.95.15.45.15.55.35.35.34.84.54.85.04.44.23.83.53.5
Percentage of Assets us-gaap:SecuredDebt0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Pension And Other Postretirement Defined Benefit Plans Liabilities Noncurrent

Stockholders Equity

us-gaap:StockholdersEquity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-312008-12-312007-12-312006-12-31
Value568305801158235557675348151668506384992649203487305015449137480404751448213481084770747284476854665945730450534401843815428014174441750410414129640499396723719236950296662937828681275502654126061252702437426589261922533226747266122429425235
Percentage of StockholdersEquity100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets14.314.915.414.914.313.914.013.713.613.313.914.013.813.314.014.214.414.215.215.014.914.614.714.714.714.114.413.813.812.913.112.512.514.414.714.413.813.413.212.812.115.70.00.00.016.00.00.0

us-gaap:ConsolidatedEntities

srt:ParentCompany



Period End2019-12-312018-12-312017-12-31
Value580115166848730
Percentage of StockholdersEquity100.0100.0100.0
Percentage of Assets14.913.913.3
Percentage of Assets srt:ParentCompany72.270.774.9

us-gaap:StatementEquityComponents

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-312008-12-312007-12-312006-12-31
Value36791156453170-660-1263-1877-1793-1599-926-622-683-934-949121241-41-616-142-397-212-430-559-371-710-872-839-7924737397813502531692914422452484694671588257-399-852-1221315266
Percentage of StockholdersEquity6.52.00.80.3-1.2-2.4-3.7-3.6-3.2-1.9-1.2-1.4-1.9-2.00.30.5-0.1-1.3-0.3-0.9-0.5-1.0-1.3-0.8-1.7-2.1-2.0-1.91.11.82.00.90.70.61.01.50.90.91.81.80.70.30.2-1.6-3.2-4.61.31.1
Percentage of Assets0.90.30.10.0-0.2-0.3-0.5-0.5-0.4-0.3-0.2-0.2-0.3-0.30.00.1-0.0-0.2-0.0-0.1-0.1-0.1-0.2-0.1-0.2-0.3-0.3-0.30.20.20.30.10.10.10.10.20.10.10.20.20.10.00.00.00.0-0.70.00.0
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-312008-12-312007-12-312006-12-31
Value334503298033826322623216032040319783186831779316563152631413313263115730439297862970929655295942906327939278692727227210266052652626426263392625626188252652521725136192741923419188191411908419059190291899018954189281889117348172781586015333
Percentage of StockholdersEquity58.956.958.157.960.162.063.263.864.665.062.963.965.265.663.161.962.362.762.162.361.161.962.062.162.263.563.364.263.664.763.767.868.065.065.566.969.571.973.175.377.971.372.374.664.964.965.360.8
Percentage of Assets8.48.48.98.68.68.68.88.88.88.78.79.09.08.78.88.89.08.99.49.49.19.09.19.19.28.99.18.98.78.48.48.58.59.49.69.69.69.79.79.69.511.20.00.00.010.40.00.0
Percentage of Assets us-gaap:AdditionalPaidInCapital0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-312008-12-312007-12-312006-12-31
Value777777777777777776666666666666666555555555554444
Percentage of StockholdersEquity0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0
Percentage of Assets us-gaap:CommonStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:PreferredStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302011-12-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-312008-12-312007-12-312006-12-31
Value000000000000000000000000000000853000000003115309600
Percentage of StockholdersEquity0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.02.20.00.00.00.00.00.00.00.011.611.60.00.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.30.00.00.00.00.00.00.00.00.01.90.00.0
Percentage of Assets us-gaap:PreferredStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:RetainedEarnings



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-312008-12-312007-12-312006-12-31
Value36552403403947638386370303587534883336263199630700319463108630326297662924528479278082704526407255402492523973231622227021259204041973118804178761685316054149051484113462130911228711399104069730896984171072710374100041030010621112679760
Percentage of StockholdersEquity64.369.567.868.869.269.468.967.465.063.063.763.363.162.660.759.258.357.255.454.754.553.252.650.849.748.947.345.843.341.640.540.140.245.444.642.841.439.237.335.534.540.339.639.538.539.946.438.7
Percentage of Assets9.210.310.410.39.99.69.69.28.88.48.88.98.78.38.58.48.48.18.48.28.17.87.77.57.36.96.86.36.05.45.35.05.06.56.56.25.75.34.94.54.26.30.00.00.06.40.00.0
Percentage of Assets us-gaap:RetainedEarnings0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:TreasuryStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-312008-12-312007-12-312006-12-31
Value-16858-16472-15527-15058-15056-14991-14353-13782-12980-12707-12703-12686-12685-12467-11599-10405-9776-8806-8180-7553-6928-6365-5863-5300-4359-4320-3574-3316-3315-3287-3287-3286-3286-3244-3243-3241-3240-3202-3202-3200-3198-3180-3172-3169-3168-3165-3153-128
Percentage of StockholdersEquity-29.7-28.4-26.7-27.0-28.2-29.0-28.3-27.6-26.4-26.1-25.3-25.8-26.4-26.2-24.1-21.6-20.5-18.6-17.2-16.2-15.1-14.1-13.3-12.1-10.2-10.3-8.6-8.1-8.0-8.1-8.3-8.8-8.9-10.9-11.0-11.3-11.8-12.1-12.3-12.7-13.1-12.0-12.1-12.5-11.8-11.9-13.0-0.5
Percentage of Assets-4.2-4.2-4.1-4.0-4.0-4.0-4.0-3.8-3.6-3.5-3.5-3.6-3.6-3.5-3.4-3.1-3.0-2.6-2.6-2.4-2.3-2.1-2.0-1.8-1.5-1.5-1.2-1.1-1.1-1.1-1.1-1.1-1.1-1.6-1.6-1.6-1.6-1.6-1.6-1.6-1.6-1.90.00.00.0-1.90.00.0
Percentage of Assets us-gaap:TreasuryStock0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Common Stock Value

us-gaap:CommonStockValue



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-31
Value7777777777777777766666666666666665555555554
Percentage of CommonStockValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Retained Earnings Accumulated Deficit

us-gaap:RetainedEarningsAccumulatedDeficit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-31
Value36552403403947638386370303587534883336263199630700319463108630326297662924528479278082704526407255402492523973231622227021259204041973118804178761685316054149051484113462130911228711399104069730896984171072710621
Percentage of RetainedEarningsAccumulatedDeficit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets9.210.310.410.39.99.69.69.28.88.48.88.98.78.38.58.48.48.18.48.28.17.87.77.57.36.96.86.36.05.45.35.05.06.56.56.25.75.34.94.54.26.36.4

cof:CumulativeEffectPeriodOfAdoption

cof:CumulativeEffectPeriodOfAdoptionAdjustment



Period End2020-01-01
Value11
Percentage of RetainedEarningsAccumulatedDeficit0.0
Percentage of Assets0.0
Percentage of Assets cof:CumulativeEffectPeriodOfAdoptionAdjustment0.0

us-gaap:AdjustmentsForNewAccountingPronouncements

us-gaap:AccountingStandardsUpdate201613



Period End2020-01-01
Value2200
Percentage of RetainedEarningsAccumulatedDeficit0.0
Percentage of Assets0.0
Percentage of Assets us-gaap:AccountingStandardsUpdate2016130.0

Treasury Stock Value

Accumulated Other Comprehensive Income Loss Net Of Tax

us-gaap:AccumulatedOtherComprehensiveIncomeLossNetOfTax



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-12-312011-09-302011-06-302011-03-312010-12-312010-09-302010-06-302010-03-312009-12-312008-12-31
Value36791156453170-660-1263-1877-1793-1599-926-622-683-934-949121241-41-616-142-397-212-430-559-371-710-872-839-79247373978135025316929144224524846946715882-1221
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Assets0.90.30.10.0-0.2-0.3-0.5-0.5-0.4-0.3-0.2-0.2-0.3-0.30.00.1-0.0-0.2-0.0-0.1-0.1-0.1-0.2-0.1-0.2-0.3-0.3-0.30.20.20.30.10.10.10.10.20.10.10.20.20.10.0-0.7

cof:CumulativeEffectPeriodOfAdoption

cof:CumulativeEffectPeriodOfAdoptionAdjustment



Period End2020-01-01
Value-11
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax0.0
Percentage of Assets0.0
Percentage of Assets cof:CumulativeEffectPeriodOfAdoptionAdjustment0.0

us-gaap:FinancialInstrument, us-gaap:StatementEquityComponents

us-gaap:AvailableforsaleSecurities, us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312015-12-31
Value2151935225125-147-439-653-630-56517191181-4162
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax58.580.949.773.522.334.834.835.135.3-1.8-30.7-26.50.4-26.3
Percentage of Assets0.50.20.10.0-0.0-0.1-0.2-0.2-0.20.00.10.1-0.00.0
Percentage of Assets us-gaap:AvailableforsaleSecurities us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss0.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:HeldtomaturitySecurities, us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312015-12-31
Value0-170-178-184-190-196-204-212-524-549-575-621-725
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax0.0-37.5-104.727.915.010.411.413.356.688.384.265.4117.7
Percentage of Assets0.0-0.0-0.0-0.0-0.1-0.1-0.1-0.1-0.1-0.2-0.2-0.2-0.2
Percentage of Assets us-gaap:HeldtomaturitySecurities us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss0.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:StatementEquityComponents

cof:AccumulatedOtherComprehensiveIncomeLossOtherComponent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-312010-12-31
Value-26-26-43-41-41-39-30-29-290-12-16-19-24-29-33-41-30-33-23-23-21-8-13-12-11-36-35-39-41-60-46
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax-0.7-2.2-9.5-24.16.23.11.61.61.8-0.01.92.32.02.5-24.0-13.7100.04.923.25.810.84.91.43.51.71.34.34.4-8.2-5.5-35.5-18.5
Percentage of Assets-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.00.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0
Percentage of Assets cof:AccumulatedOtherComprehensiveIncomeLossOtherComponent0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-312010-12-31
Value1728354585396-141-418-856-775-662-281-116-99-144-784986404971203219117210-88-20-91-110-76-1293245-26-52
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax47.030.6129.1232.921.433.145.643.241.430.318.614.515.48.2411.6265.6-1212.2-19.5-226.1-22.9-81.1-2.315.75.412.812.69.116.36.86.1-15.4-21.0
Percentage of Assets0.40.10.20.1-0.0-0.1-0.2-0.2-0.2-0.1-0.0-0.0-0.0-0.00.10.20.20.00.10.00.10.0-0.0-0.0-0.0-0.0-0.0-0.00.00.0-0.0-0.0
Percentage of Assets us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:AccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-31
Value36791156
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax100.0100.0
Percentage of Assets0.90.3
Percentage of Assets us-gaap:AccumulatedOtherComprehensiveIncome0.00.0

us-gaap:AccumulatedTranslationAdjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312011-12-312010-12-31
Value-174-107-144-132-147-177-142-155-131-138-136-174-205-222-192-172-142-143-109-57-92-824106274013-111-9332-49-36
Percentage of AccumulatedOtherComprehensiveIncomeLossNetOfTax-4.7-9.3-31.8-77.622.314.07.68.68.214.921.925.521.923.4-158.7-71.4346.323.276.814.443.41.9-4.3-28.6-3.8-4.6-1.514.0-19.74.3-29.0-14.5
Percentage of Assets-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.0-0.1-0.1-0.1-0.1-0.0-0.0-0.0-0.0-0.0-0.00.00.00.00.00.0-0.0-0.00.0-0.0-0.0
Percentage of Assets us-gaap:AccumulatedTranslationAdjustment0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-03-312011-09-302011-03-312010-09-302010-03-312009-12-312009-09-302009-03-31
Value5409412034124226488139403351408016074091306838603163199532932466410211224657235519931603278117613159-5280963228382794927498114661555186932092023-84251479
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 Revenues74.655.549.059.368.956.248.156.723.358.343.957.648.430.451.039.465.918.178.941.535.327.649.332.258.8-95.2170.450.350.316.586.10.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-03-312011-09-302011-03-312010-09-302010-03-312009-12-312009-09-302009-03-31
Value1041-17112-5761-51385013-9747-2256-4297682-3796-7450-63732078-10453-6259-8190-728-20166-5089-75423071-7904-4220-72533386789-797-14135142-6846-764123135-372-456-5226141352737341762
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 Revenues14.4-230.4-82.8-72.170.8-139.0-32.4-59.79.9-54.1-106.7-95.131.8-159.2-96.9-131.0-11.7-325.6-86.3-133.054.4-136.0-74.8-132.663.114.2-14.1-25.192.6-121.7-132.20.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-03-312011-09-302011-03-312010-09-302010-03-312009-12-312009-09-302009-03-31
Value510192044065-2705-39457668-2763-804-232452696155-273-7933934049117638-6162202301133452-341573958556042-66545064-7770-3518-12248110082650217-14681309-2944-93511114-4404-2978
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 Revenues70.4123.958.4-38.0-55.7109.3-39.7-11.2-33.675.188.1-4.1-121.4142.276.0122.1-99.1326.61.960.9-60.5127.215.2110.5-123.991.3-137.5-62.4-220.6195.745.80.00.00.00.00.00.00.00.0

Net Cash Provided By Used In Operating Activities

us-gaap:NetCashProvidedByUsedInOperatingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-03-312011-09-302011-03-312010-09-302010-03-312009-12-312009-09-302009-03-31
Value5409412034124226488139403351408016074091306838603163199532932466410211224657235519931603278117613159-5280963228382794927498114661555186932092023-84251479
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 Revenues74.655.549.059.368.956.248.156.723.358.343.957.648.430.451.039.465.918.178.941.535.327.649.332.258.8-95.2170.450.350.316.586.10.00.00.00.00.00.00.00.0

Net Income Loss

us-gaap:NetIncomeLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value-134011761333162514121261150219061346-97111071036810791100594210139201114863115399910811194115485211171117106684311789314038139111016803608636375394223-108
Percentage of NetIncomeLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0
Percentage of Revenues-18.515.819.222.819.918.021.626.519.5-13.815.815.512.412.015.615.116.314.918.915.220.417.219.221.821.515.419.819.819.215.020.41.80.00.00.00.00.00.00.00.00.00.00.0

us-gaap:FinancialInstrument, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:AvailableforsaleSecurities, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value0-1331218-16-14906142
Percentage of NetIncomeLoss-0.0-1.10.20.71.3-1.3-9.90.00.4-0.13.8
Percentage of Revenues0.0-0.20.00.20.3-0.2-2.10.00.10.00.6
Percentage of Revenues us-gaap:AvailableforsaleSecurities us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:HeldtomaturitySecurities, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value0-6-8-6-6-6-8-8-18-25-26
Percentage of NetIncomeLoss-0.0-0.5-0.6-0.4-0.4-0.5-0.5-0.4-1.32.6-2.3
Percentage of Revenues0.0-0.1-0.1-0.1-0.1-0.1-0.1-0.1-0.3-0.4-0.4
Percentage of Revenues us-gaap:HeldtomaturitySecurities us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss0.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value321-10826-125-153104-175-130-337519182225212313101638614-4451
Percentage of NetIncomeLoss-24.0-9.22.0-7.7-10.88.2-11.7-0.70.00.33.30.52.32.32.22.72.12.51.21.21.40.30.70.51.2-5.20.40.1
Percentage of Revenues4.4-1.50.4-1.8-2.21.5-2.5-0.20.0-0.00.50.10.30.30.30.40.30.40.20.20.30.10.10.10.3-0.80.10.0
Percentage of Revenues us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, cof:AccumulatedOtherComprehensiveIncomeLossOtherComponent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value0120110112112120-203012-241-110
Percentage of NetIncomeLoss-0.00.10.20.00.10.10.00.10.1-0.20.10.10.20.10.20.0-0.20.00.30.00.10.2-0.20.30.1-1.30.0
Percentage of Revenues0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0-0.00.00.10.00.00.0-0.00.10.0-0.20.0
Percentage of Revenues us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome cof:AccumulatedOtherComprehensiveIncomeLossOtherComponent0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value321-9029-131-166125-18-611192029404849494952374243342924218610
Percentage of NetIncomeLoss-24.0-7.72.2-8.1-11.89.9-1.2-0.30.8-2.01.82.84.96.14.95.24.85.73.34.93.73.42.72.01.80.90.50.9
Percentage of Revenues4.4-1.20.4-1.8-2.31.8-0.3-0.10.20.30.30.40.60.70.80.80.80.80.60.70.80.60.50.40.40.10.10.2
Percentage of Revenues us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

Depreciation Depletion And Amortization

Net Cash Provided By Used In Investing Activities

us-gaap:NetCashProvidedByUsedInInvestingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-03-312011-09-302011-03-312010-09-302010-03-312009-12-312009-09-302009-03-31
Value1041-17112-5761-51385013-9747-2256-4297682-3796-7450-63732078-10453-6259-8190-728-20166-5089-75423071-7904-4220-72533386789-797-14135142-6846-764123135-372-456-5226141352737341762
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 Revenues14.4-230.4-82.8-72.170.8-139.0-32.4-59.79.9-54.1-106.7-95.131.8-159.2-96.9-131.0-11.7-325.6-86.3-133.054.4-136.0-74.8-132.663.114.2-14.1-25.192.6-121.7-132.20.00.00.00.00.00.00.00.0

Payments To Acquire Property Plant And Equipment

us-gaap:PaymentsToAcquirePropertyPlantAndEquipment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-03-312011-09-302011-03-312010-09-302010-03-312009-12-312009-09-302009-03-31
Value1542562352131832052402242052422932612222711841901341211827615397155121129196172214236201971561106775731736107
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

Net Cash Provided By Used In Financing Activities

us-gaap:NetCashProvidedByUsedInFinancingActivities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-03-312011-09-302011-03-312010-09-302010-03-312009-12-312009-09-302009-03-31
Value510192044065-2705-39457668-2763-804-232452696155-273-7933934049117638-6162202301133452-341573958556042-66545064-7770-3518-12248110082650217-14681309-2944-93511114-4404-2978
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 Revenues70.4123.958.4-38.0-55.7109.3-39.7-11.2-33.675.188.1-4.1-121.4142.276.0122.1-99.1326.61.960.9-60.5127.215.2110.5-123.991.3-137.5-62.4-220.6195.745.80.00.00.00.00.00.00.00.0

Proceeds From Issuance Of Long Term Debt

Payments For Repurchase Of Common Stock

us-gaap:PaymentsForRepurchaseOfCommonStock



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-03-312011-09-302011-03-312010-09-302010-03-312009-12-312009-09-302009-03-31
Value38694546926563857180227341712188681194629970626627625563502563941397462581280142238217832
Percentage of PaymentsForRepurchaseOfCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Debt Instrument Interest Rate Stated Percentage

us-gaap:Range, us-gaap:DebtInstrument, us-gaap:LongtermDebtType

us-gaap:DebtInstrumentInterestRateStatedPercentage

srt:Maximum, cof:FixedUnsecuredSubordinatedDebt, us-gaap:SubordinatedDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value0.0420.0420.0420.0880.0880.0880.088
Percentage of DebtInstrumentInterestRateStatedPercentage100.0100.0100.0100.0100.0100.0100.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.00.00.00.00.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations srt:Maximum cof:FixedUnsecuredSubordinatedDebt us-gaap:SubordinatedDebt0.00.00.00.00.00.00.0

srt:Maximum, cof:FloatingUnsecuredSeniorDebt, us-gaap:SeniorNotes



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value0.02920.03090.03420.03730.0390.03720.0349
Percentage of DebtInstrumentInterestRateStatedPercentage69.573.681.442.444.342.339.7
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.00.00.00.00.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations srt:Maximum cof:FloatingUnsecuredSeniorDebt us-gaap:SeniorNotes0.00.00.00.00.00.00.0

srt:Minimum, cof:FixedUnsecuredSeniorDebt, us-gaap:SeniorNotes



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value0.0080.0080.0080.0080.01850.01850.0185
Percentage of DebtInstrumentInterestRateStatedPercentage19.019.019.09.121.021.021.0
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.00.00.00.00.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations srt:Minimum cof:FixedUnsecuredSeniorDebt us-gaap:SeniorNotes0.00.00.00.00.00.00.0

srt:Minimum, cof:FloatingUnsecuredSeniorDebt, us-gaap:SeniorNotes



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value0.01950.02320.02590.02940.0310.02970.0274
Percentage of DebtInstrumentInterestRateStatedPercentage46.455.261.733.435.233.831.1
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.00.00.00.00.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations srt:Minimum cof:FloatingUnsecuredSeniorDebt us-gaap:SeniorNotes0.00.00.00.00.00.00.0

us-gaap:Range, us-gaap:LongtermDebtType

srt:Maximum, us-gaap:CapitalLeaseObligations



Period End2020-03-312019-12-31
Value0.09910.1286
Percentage of DebtInstrumentInterestRateStatedPercentage236.0306.2
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations srt:Maximum us-gaap:CapitalLeaseObligations0.00.0

srt:Maximum, us-gaap:FederalHomeLoanBankAdvances



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value0.00.00.00.05360.05360.0536
Percentage of DebtInstrumentInterestRateStatedPercentage0.00.00.060.960.960.9
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.00.00.00.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations srt:Maximum us-gaap:FederalHomeLoanBankAdvances0.00.00.00.00.00.0

srt:Maximum, us-gaap:SecuredDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value0.03010.03010.03010.03150.03340.03310.0301
Percentage of DebtInstrumentInterestRateStatedPercentage71.771.771.735.838.037.634.2
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.00.00.00.00.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations srt:Maximum us-gaap:SecuredDebt0.00.00.00.00.00.00.0

srt:Minimum, us-gaap:CapitalLeaseObligations



Period End2020-03-312019-12-31
Value0.01630.022
Percentage of DebtInstrumentInterestRateStatedPercentage38.852.4
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations srt:Minimum us-gaap:CapitalLeaseObligations0.00.0

srt:Minimum, us-gaap:FederalHomeLoanBankAdvances



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value0.00.00.00.04460.02480.0215
Percentage of DebtInstrumentInterestRateStatedPercentage0.00.00.050.728.224.4
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.00.00.00.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations srt:Minimum us-gaap:FederalHomeLoanBankAdvances0.00.00.00.00.00.0

srt:Minimum, us-gaap:SecuredDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-30
Value0.01050.01660.01660.01330.01330.01330.0133
Percentage of DebtInstrumentInterestRateStatedPercentage25.039.539.515.115.115.115.1
Percentage of LongTermDebtAndCapitalLeaseObligations0.00.00.00.00.00.00.0
Percentage of LongTermDebtAndCapitalLeaseObligations srt:Minimum us-gaap:SecuredDebt0.00.00.00.00.00.00.0

Effective Income Tax Rate Continuing Operations

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

us-gaap:PlanName

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber

cof:StockIncentivePlan2004



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value334691012
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:PlanName

us-gaap:ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

cof:StockIncentivePlan2004



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-31
Value55.5456.0348.548.0353.9855.8757.41
Percentage of ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice100.0100.0100.0100.0100.0100.0100.0

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

Share Based Compensation

us-gaap:ShareBasedCompensation



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-03-312011-09-302011-03-312010-09-302010-03-312009-12-312009-09-302009-03-31
Value246446577217454167805334778960464440-37450383053846860585446376318753046434424
Percentage of ShareBasedCompensation100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Deferred Tax Liabilities

Deferred Tax Assets Net

us-gaap:DeferredTaxAssetsNet



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value3677343140755871521346905111457336193911
Percentage of DeferredTaxAssetsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Unrecognized Tax Benefits

us-gaap:ReasonablyPossibleSignificantChangeInUnrecognizedTaxBenefitsByItem

us-gaap:UnrecognizedTaxBenefits

cof:AccruedInterestAndPenalties



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value31352924333639546065
Percentage of UnrecognizedTaxBenefits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cof:GrossTaxInterestAndPenalties



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value462475115109163143153262273350
Percentage of UnrecognizedTaxBenefits1490.31357.1396.6454.2493.9397.2392.3485.2455.0538.5

cof:GrossUnrecognizedTaxBenefits



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value4314408685130107114208213285
Percentage of UnrecognizedTaxBenefits1390.31257.1296.6354.2393.9297.2292.3385.2355.0438.5

Deferred Tax Assets Valuation Allowance

us-gaap:DeferredTaxAssetsValuationAllowance



Period End2019-12-312018-12-312017-12-312016-12-312015-12-312014-12-312013-12-312012-12-312011-12-312010-12-31
Value22324522617916614813912389130
Percentage of DeferredTaxAssetsValuationAllowance100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions

Operating Lease Right Of Use Asset

us-gaap:OperatingLeaseRightOfUseAsset



Period End2019-12-312019-09-302019-06-302019-03-31
Value1433144814901547
Percentage of OperatingLeaseRightOfUseAsset100.0100.0100.0100.0

Cash And Cash Equivalents Period Increase Decrease

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302015-12-312014-12-31
Value2530013749175371582119438134891162813296143171435287887015980112493938190407476
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidatedEntities

srt:ParentCompany



Period End2019-12-312018-12-312017-12-312016-12-31
Value130501028681967296
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents94.976.357.158.4

cof:Amortizationofbasisadjustment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value36-660566150191610
Percentage of Amortizationofbasisadjustment100.0100.0100.0100.0100.0100.0100.0100.0100.0

cof:CertainLoansAcquiredinTransferAccountedforasDebtSecuritiesAccretableYieldReclassificationsfromtoNonaccretableDifference



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312016-09-302016-06-302015-12-312015-09-302015-06-302014-12-31
Value52-161-18-37421586-3523221347936983-42
Percentage of CertainLoansAcquiredinTransferAccountedforasDebtSecuritiesAccretableYieldReclassificationsfromtoNonaccretableDifference100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

cof:FairValueAssetsMeasureonRecurringBasisUnrealizedGainLossinOCI

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-09-302019-06-302019-03-31
Value-521310
Percentage of FairValueAssetsMeasureonRecurringBasisUnrealizedGainLossinOCI100.0100.0100.0100.0

us-gaap:FinancingReceivablePortfolioSegment

cof:FinancingReceivableAllowanceForCreditLossAdjustmentsOther

cof:CreditCardPortfolioSegment



Period End2020-03-31
Value-18
Percentage of FinancingReceivableAllowanceForCreditLossAdjustmentsOther100.0

us-gaap:CommercialPortfolioSegment



Period End2020-03-31
Value0.0
Percentage of FinancingReceivableAllowanceForCreditLossAdjustmentsOther-0.0

us-gaap:ConsumerPortfolioSegment



Period End2020-03-31
Value0.0
Percentage of FinancingReceivableAllowanceForCreditLossAdjustmentsOther-0.0

us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:AllowanceForLoanAndLeaseLosses



Period End2020-03-31
Value-18
Percentage of FinancingReceivableAllowanceForCreditLossAdjustmentsOther100.0

us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:LoanRestructuringModification

cof:FinancingReceivableModificationsAverageRateReduction

us-gaap:CommercialPortfolioSegment, cof:CommercialAndIndustrial, us-gaap:ContractualInterestRateReduction



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value0.0-0.00270.010.00.0-0.00160000000000000070.00.020.0-9.99999999999994e-050.00240.02230.00310.00.00150.00060.0-0.00390.00.01140.02020.01480.00850.0
Percentage of FinancingReceivableModificationsAverageRateReduction0.0100.0100.00.00.0100.00.0100.00.0100.0100.0100.0100.00.0100.0100.00.0100.00.0100.0100.0100.0100.00.0

us-gaap:CommercialPortfolioSegment, cof:CommercialAndMultifamilyRealEstate, us-gaap:ContractualInterestRateReduction



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value0.00.00.00.00.00.00.00.00.00.00.00.00.00250.00.00.00.00.00.00.00.00.00050000000000000040.00.0
Percentage of FinancingReceivableModificationsAverageRateReduction0.0-0.00.00.00.0-0.00.00.00.0-0.00.00.080.60.00.00.00.0-0.00.00.00.03.40.00.0

us-gaap:CommercialPortfolioSegment, cof:CommercialLending, us-gaap:ContractualInterestRateReduction



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value-0.00030.00070.00.0-0.00160000000000000070.00.020.00.00.00240.02230.00270.00.00150.00.0-0.00390.00.01140.02020.00239999999999999940.00850.0
Percentage of FinancingReceivableModificationsAverageRateReduction11.17.00.00.0100.00.0100.00.0-0.0100.0100.087.10.0100.00.00.0100.00.0100.0100.016.2100.00.0

us-gaap:ConsumerPortfolioSegment, cof:RetailBanking, us-gaap:ContractualInterestRateReduction



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value0.125-0.00070000000000000620.0930.10550.1301-0.00169999999999999320.10450.11560.10220.00210000000000000460.0930.0010.03-0.000100000000000002860.10440.0410.063-0.00310000000000000550.06150.06930.0936-0.0096000000000000040.06420.0757
Percentage of FinancingReceivableModificationsAverageRateReduction0.025.9930.00.00.0106.20.0578.00.0-2100.03875.04.5967.70.06960.06833.30.079.50.0607.9463.4-64.9755.30.0

us-gaap:ConsumerPortfolioSegment, us-gaap:AutomobileLoan, us-gaap:ContractualInterestRateReduction



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value0.0334-0.00069999999999999920.03510.03780.0383-0.000300000000000001650.03880.0410.0376-0.000100000000000002860.03780.03650.04020.00160000000000000420.03520.03860.03930.00209999999999999770.04140.04110.01710.00140000000000000020.0170.0145
Percentage of FinancingReceivableModificationsAverageRateReduction0.025.9351.00.00.018.80.0205.00.0100.01575.0163.71296.80.02346.76433.30.0-53.80.0360.584.79.5200.00.0

us-gaap:FinancingReceivablePortfolioSegment, us-gaap:GeographicDistribution, us-gaap:LoanRestructuringModification

cof:CreditCardPortfolioSegment, us-gaap:GeographicDistributionDomestic, us-gaap:ContractualInterestRateReduction



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value0.16450.000200000000000005730.16760.1660.16420.00050000000000000040.16010.1590.15730.00250000000000000220.14510.14360.13850.00239999999999998550.13120.12810.12850.00120000000000000660.1230.12030.12130.00070000000000000620.11520.1154
Percentage of FinancingReceivableModificationsAverageRateReduction0.0-7.41676.00.00.0-31.30.0795.00.0-2500.06045.8643.94467.70.08746.721350.00.0-30.80.01055.3600.54.71355.30.0

cof:CreditCardPortfolioSegment, us-gaap:GeographicDistributionForeign, us-gaap:ContractualInterestRateReduction



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value0.27320.000299999999999966960.27080.27250.27590.00090000000000001190.26950.26790.26860.00050000000000000040.26710.2650.26189.999999999998899e-050.25910.26010.25669.999999999998899e-050.25890.25950.25790.000400000000000011460.25410.2546
Percentage of FinancingReceivableModificationsAverageRateReduction0.0-11.12708.00.00.0-56.30.01339.50.0-500.011129.21188.38445.20.017273.343350.00.0-2.60.02276.31276.72.72989.40.0

us-gaap:FinancingReceivablePortfolioSegment, us-gaap:LoanRestructuringModification

cof:CreditCardPortfolioSegment, us-gaap:ContractualInterestRateReduction



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value0.2041-0.00060000000000001720.20190.20320.20040.00089999999999998410.19350.19220.19170.00120000000000000660.17850.18120.1774-0.00090000000000001190.16690.17470.17520.00050000000000000040.16010.16250.1639-0.00090000000000001190.16120.1683
Percentage of FinancingReceivableModificationsAverageRateReduction0.022.22019.00.00.0-56.20.0961.00.0-1200.07437.5812.65722.60.011126.729116.70.0-12.80.01425.4811.4-6.11896.50.0

us-gaap:CommercialPortfolioSegment, us-gaap:ContractualInterestRateReduction



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value0.0-0.00030.010.00.0-0.00160000000000000070.00.020.00.00.00240.02230.00270.00.00150.00.0-0.00390.00.01140.02020.00239999999999999940.00850.0
Percentage of FinancingReceivableModificationsAverageRateReduction0.011.1100.00.00.0100.00.0100.00.0-0.0100.0100.087.10.0100.00.00.0100.00.0100.0100.016.2100.00.0

us-gaap:ConsumerPortfolioSegment, us-gaap:ContractualInterestRateReduction



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value0.0336-0.00080000000000000210.03530.03930.0388-9.999999999999593e-050.03930.04220.03710.000200000000000005730.03880.03540.03780.00109999999999999680.03410.03640.03720.00130000000000000250.03810.04030.02360.00089999999999999980.01880.0162
Percentage of FinancingReceivableModificationsAverageRateReduction0.029.6353.00.00.06.20.0211.00.0-200.01616.7158.71219.40.02273.36066.70.0-33.30.0353.5116.86.1221.20.0

us-gaap:LoanRestructuringModification

us-gaap:ContractualInterestRateReduction



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value0.17870.00290000000000001370.1670.17450.14640.00050000000000000040.17260.16630.1650.00150000000000000130.11910.13350.14140.00250000000000000220.12550.10820.13210.000200000000000005730.12130.12980.1219-0.00169999999999999320.11940.1373
Percentage of FinancingReceivableModificationsAverageRateReduction0.0-107.41670.00.00.0-31.30.0831.50.0-1500.04962.5598.74561.30.08366.718033.30.0-5.10.01138.6603.5-11.51404.70.0

us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:IncomeStatementLocation

cof:GainLossOnCashFlowHedgesRecognizedInEarnings

us-gaap:CashFlowHedging, cof:InterestincomeInvestmentsecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value20-1-3-40-5-2-2
Percentage of GainLossOnCashFlowHedgesRecognizedInEarnings100.00.0100.0100.0100.00.0100.0100.0100.0

us-gaap:CashFlowHedging, cof:InterestincomeLoans



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value24-5-43-59-56-42-31-178
Percentage of GainLossOnCashFlowHedgesRecognizedInEarnings1200.00.04300.01966.71400.00.0620.0850.0-400.0

us-gaap:CashFlowHedging, cof:InterestincomeOther



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value771213121414118
Percentage of GainLossOnCashFlowHedgesRecognizedInEarnings350.00.0-1200.0-433.3-300.00.0-280.0-550.0-400.0

us-gaap:CashFlowHedging, cof:NonInterestIncomeOther



Period End2020-03-312019-12-312019-09-302019-06-302018-12-312018-09-30
Value0.0-1000000.01000000.0-1000000.0-1000000.00.0
Percentage of GainLossOnCashFlowHedgesRecognizedInEarnings0.00.0-100.033.30.0-0.0

us-gaap:FairValueByMeasurementFrequency

cof:GainLossOnFairValueAssetsRecognizedInEarnings

us-gaap:FairValueMeasurementsNonrecurring



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312011-09-302010-09-30
Value-251-94-60-65-1252-46-28-87-199
Percentage of GainLossOnFairValueAssetsRecognizedInEarnings100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByMeasurementFrequency

cof:GainLossOnFairValueLoansHeldForInvestmentRecognizedInEarnings

us-gaap:FairValueMeasurementsNonrecurring



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312011-09-302010-09-30
Value-207-79-57-57-7514-3411-76-1817
Percentage of GainLossOnFairValueLoansHeldForInvestmentRecognizedInEarnings100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByMeasurementFrequency

cof:GainLossOnFairValueLoansHeldForSaleRecognizedInEarnings

us-gaap:FairValueMeasurementsNonrecurring



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312011-09-302010-09-30
Value000-1-2-303-1
Percentage of GainLossOnFairValueLoansHeldForSaleRecognizedInEarnings0.00.00.0100.0100.0100.00.0100.0100.0

us-gaap:FairValueByMeasurementFrequency

cof:GainLossOnFairValueOtherAssetsRecognizedInEarnings

us-gaap:FairValueMeasurementsNonrecurring



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312011-09-302010-09-30
Value-44-16-3-8-49-17-10-36-1102
Percentage of GainLossOnFairValueOtherAssetsRecognizedInEarnings100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0

us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:IncomeStatementLocation

cof:GainorLossonFairValueHedgesRecognizedinNetInterestIncome

us-gaap:InterestRateContract, us-gaap:FairValueHedging, cof:InterestexpenseDeposits



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-2-13-26-33-36-28-25-21-2
Percentage of GainorLossonFairValueHedgesRecognizedinNetInterestIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestRateContract, us-gaap:FairValueHedging, cof:InterestexpenseSecuritizedDebtObligation



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value123-5-6-6-9-21-18-5
Percentage of GainorLossonFairValueHedgesRecognizedinNetInterestIncome-600.0-23.119.218.216.732.184.085.7250.0

us-gaap:InterestRateContract, us-gaap:FairValueHedging, cof:InterestexpenseSeniorandSubordinatedDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value3918-3-10-11-4-8410
Percentage of GainorLossonFairValueHedgesRecognizedinNetInterestIncome-1950.0-138.511.530.330.614.332.0-19.0-500.0

us-gaap:InterestRateContract, us-gaap:FairValueHedging, cof:InterestincomeInvestmentsecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-11-10-3-12-1-5-9-8
Percentage of GainorLossonFairValueHedgesRecognizedinNetInterestIncome550.076.911.53.0-5.63.620.042.9400.0

cof:InterchangeFeesNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value752811790820758743714723643665662676570637603616596617555567496523523535440489476
Percentage of InterchangeFeesNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cof:InterestExpenseOtherBorrowings



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value15181511273713102234311225273428241412121511168121311121796888686858086858692371818180
Percentage of InterestExpenseOtherBorrowings100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cof:InterestExpenseSecuredDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value99118123139143138127124107918582696556474843393633363239384042
Percentage of InterestExpenseSecuredDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cof:InterestExpenseUnsecuredDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value23923629931031429728828925120919417914913812111110689828079737178777576
Percentage of InterestExpenseUnsecuredDebt100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cof:IssuanceCostForPreferredStockRedeemed



Period End2020-03-312019-03-31
Value220
Percentage of IssuanceCostForPreferredStockRedeemed100.00.0

cof:NoninterestIncomeExcludingRevenuefromContractwithCustomer



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value287346280409398306318759387
Percentage of NoninterestIncomeExcludingRevenuefromContractwithCustomer100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-50-42-32-24-4-9-60375-27
Percentage of NoninterestIncomeExcludingRevenuefromContractwithCustomer-17.4-12.1-11.4-5.9-1.0-2.9-18.949.4-7.0

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, cof:CommercialBanking



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value191174170158151124148166148
Percentage of NoninterestIncomeExcludingRevenuefromContractwithCustomer66.650.360.738.637.940.546.521.938.2

us-gaap:OperatingSegments, cof:ConsumerBanking



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-71914150-855
Percentage of NoninterestIncomeExcludingRevenuefromContractwithCustomer-2.40.33.23.43.80.0-2.50.71.3

us-gaap:OperatingSegments, us-gaap:CreditCard



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value153213133261236191238213261
Percentage of NoninterestIncomeExcludingRevenuefromContractwithCustomer53.361.647.563.859.362.474.828.167.4

cof:OtherComprehensiveIncomeLossBeforeTaxAttributableToParent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value022-2-1-2-12-1-1-1197579612-175-150-4-206-3-143-1
Percentage of OtherComprehensiveIncomeLossBeforeTaxAttributableToParent0.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0

cof:OtherComprehensiveIncomeLossOtherTaxAttributableToParent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value050-10-30-107322424-62-50-2-71-20180
Percentage of OtherComprehensiveIncomeLossOtherTaxAttributableToParent0.0100.00.0100.00.0100.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.00.0100.00.0

cof:OtherComprehensiveIncomeLossSecuritiesTransferredToHeldToMaturityAdjustmentBeforeTaxPortionAttributableToParent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value0101097910105593740373646444133374140333535332830-1465
Percentage of OtherComprehensiveIncomeLossSecuritiesTransferredToHeldToMaturityAdjustmentBeforeTaxPortionAttributableToParent0.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cof:OtherComprehensiveIncomeLossSecuritiesTransferredToHeldToMaturityAdjustmentNetOfTaxPortionAttributableToParent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value068666884252526232330282521242527202022211318-915
Percentage of OtherComprehensiveIncomeLossSecuritiesTransferredToHeldToMaturityAdjustmentNetOfTaxPortionAttributableToParent0.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cof:OtherComprehensiveIncomeLossSecuritiesTransferredToHeldToMaturityAdjustmentTaxPortionAttributableToParent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value042313221341214141316161612131613131513121512-550
Percentage of OtherComprehensiveIncomeLossSecuritiesTransferredToHeldToMaturityAdjustmentTaxPortionAttributableToParent0.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cof:OtherComprehensiveIncomeOtherNetOfTaxAttributableToParent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value017-20-2-9-10-112435548-113-100-2-135-1-125-1
Percentage of OtherComprehensiveIncomeOtherNetOfTaxAttributableToParent0.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0

cof:OtherthanTemporaryImpairmentLossesDebtSecuritiesAvailableforsaleIntenttoSell



Period End2019-12-312019-09-302018-12-312018-09-302017-12-312017-09-30
Value00020000
Percentage of OtherthanTemporaryImpairmentLossesDebtSecuritiesAvailableforsaleIntenttoSell0.00.00.0100.00.00.0

cof:ParticipatingSecuritiesDistributedandUndistributedEarningsLossexcludingPreferredStockDividendsBasic



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value37101212891210-88856666464645454545
Percentage of ParticipatingSecuritiesDistributedandUndistributedEarningsLossexcludingPreferredStockDividendsBasic100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cof:PaymentsForRedemptionOfPreferredStock



Period End2020-03-312019-03-31
Value8750
Percentage of PaymentsForRedemptionOfPreferredStock100.00.0

cof:ProceedsfromIssuanceofUnsecuredDebtandLongTermFHLBAdvancesNetofIssuanceCost



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value1995014961403124307501993323476421591978813984260454308600635017294149410054298812982
Percentage of ProceedsfromIssuanceofUnsecuredDebtandLongTermFHLBAdvancesNetofIssuanceCost100.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncomeStatementLocation

cof:RealizedGainsonForeignExchangeContractsReclassifiedfromAOCI

cof:NonInterestIncomeOther



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value3921177112317215714210175
Percentage of RealizedGainsonForeignExchangeContractsReclassifiedfromAOCI100.0100.0100.0100.0100.0100.0100.0100.0100.0

cof:RepaymentsofUnsecuredDebtandLongTermFHLBAdvances



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value1500028447512000120517511112069683493162131572717697000135114050113658021391125001001
Percentage of RepaymentsofUnsecuredDebtandLongTermFHLBAdvances100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0

cof:ServiceChargesandOtherCustomerRelatedFees



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value327342283352353352410391432394414418371484387371404426423429437462471460474504530
Percentage of ServiceChargesandOtherCustomerRelatedFees100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

cof:StockIssuedDuringPeriodSharesNewIssuesandRestrictedStockNetofForfeituresinshares

us-gaap:CommonStock



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value2002002
Percentage of StockIssuedDuringPeriodSharesNewIssuesandRestrictedStockNetofForfeituresinshares100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

cof:StockIssuedDuringPeriodSharesStockOptionsandWarrantsExercisedandRestrictedStockVesting

us-gaap:CommonStock



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value559333.00.04000.05000.0504262.0403835.0675871.0
Percentage of StockIssuedDuringPeriodSharesStockOptionsandWarrantsExercisedandRestrictedStockVesting100.00.0100.0100.0100.0100.0100.0

cof:StockIssuedDuringPeriodValueNewIssuesandRestrictedStockNetofForfeitures



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value635546523847414940453841323534302731292427
Percentage of StockIssuedDuringPeriodValueNewIssuesandRestrictedStockNetofForfeitures100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value635546523847414940453841323534292731292427
Percentage of StockIssuedDuringPeriodValueNewIssuesandRestrictedStockNetofForfeitures100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.096.7100.0100.0100.0100.0100.0

us-gaap:CommonStock



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.01000000.00.00.00.00.00.0
Percentage of StockIssuedDuringPeriodValueNewIssuesandRestrictedStockNetofForfeitures0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.03.30.00.00.00.00.0

cof:StockIssuedDuringPeriodValueStockOptionsandWarrantsExercisedandRestrictedStockVesting



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value2000001861422211665130-15-2-11114461057
Percentage of StockIssuedDuringPeriodValueStockOptionsandWarrantsExercisedandRestrictedStockVesting100.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value2000001861422211665130-15-2-11114461057
Percentage of StockIssuedDuringPeriodValueStockOptionsandWarrantsExercisedandRestrictedStockVesting100.00.00.00.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

cof:TransferOfToPortfolioLoansAndLeasesToFromHeldForSale



Period End2020-03-312019-03-31
Value-73358
Percentage of TransferOfToPortfolioLoansAndLeasesToFromHeldForSale100.0100.0

us-gaap:AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-03-312011-03-312010-09-302010-03-312009-12-312009-09-302009-03-31
Value2946556524444258684732617250443433160342822384042383330311921262129272831
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-03-312011-03-312010-09-302010-03-312009-12-312009-09-302009-03-31
Value2946556524444258684732617250443433160342822384042383330311921262129272831
Percentage of AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AffordableHousingTaxCreditsAndOtherTaxBenefitsAmount



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value1559416118417161147175146116150124114108108115113-5196891026890
Percentage of AffordableHousingTaxCreditsAndOtherTaxBenefitsAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivablePortfolioSegment

us-gaap:AllowanceForLoanAndLeaseLossRecoveryOfBadDebts

cof:CreditCardPortfolioSegment



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value373380391418330391419448305316316330263265266272247275285303297313310
Percentage of AllowanceForLoanAndLeaseLossRecoveryOfBadDebts100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommercialPortfolioSegment



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value6676262114245435442514466105
Percentage of AllowanceForLoanAndLeaseLossRecoveryOfBadDebts1.61.61.81.47.95.43.30.41.31.61.30.91.91.51.50.72.05.11.42.02.03.21.6

us-gaap:ConsumerPortfolioSegment



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value2312382512502202072162081761591581461009610210888838991747483
Percentage of AllowanceForLoanAndLeaseLossRecoveryOfBadDebts61.962.664.259.866.752.951.646.457.750.350.044.238.036.238.339.735.630.231.230.024.923.626.8

us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:AllowanceForLoanAndLeaseLosses



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value610624649674576619650658482504484481370366373384342373380403379399400404367377
Percentage of AllowanceForLoanAndLeaseLossRecoveryOfBadDebts163.5164.2166.0161.2174.5158.3155.1146.9158.0159.5153.2145.8140.7138.1140.2141.2138.5135.6133.3133.0127.6127.5129.00.00.00.0

us-gaap:FinancingReceivablePortfolioSegment

us-gaap:AllowanceForLoanAndLeaseLossesAdjustmentsNet

cof:CreditCardPortfolioSegment



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value18-8-18-162-13-1013116-13-7-1110-11-162-24-18-1610
Percentage of AllowanceForLoanAndLeaseLossesAdjustmentsNet100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommercialPortfolioSegment



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value00001-100-18-1-8-30-1-18-150000000
Percentage of AllowanceForLoanAndLeaseLossesAdjustmentsNet0.0-0.0-0.00.0-6.2-50.0-0.0-0.00.0-7.7-72.7-50.0-0.014.3163.6-150.0-0.0-0.00.0-0.0-0.0-0.00.0

us-gaap:ConsumerPortfolioSegment



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value000000-5400-200-100010000-10
Percentage of AllowanceForLoanAndLeaseLossesAdjustmentsNet0.0-0.0-0.00.0-0.00.0415.4-0.00.0-15.40.00.07.7-0.0-0.00.0-9.1-0.00.0-0.0-0.06.20.0

us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:AllowanceForLoanAndLeaseLosses



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value18-8-18-151-13-1-181033-14-8-29-5-10-162-24-17-1811-9-814
Percentage of AllowanceForLoanAndLeaseLossesAdjustmentsNet100.0100.0100.0100.093.850.0100.0100.00.076.927.350.0107.7114.3263.6-50.090.9100.0100.0100.094.4112.5110.00.00.00.0

us-gaap:BusinessAcquisition

us-gaap:AllowanceForLoanAndLeaseLossesPeriodIncreaseDecrease

cof:Walmart



Period End2019-10-11
Value84
Percentage of AllowanceForLoanAndLeaseLossesPeriodIncreaseDecrease100.0

us-gaap:FinancingReceivablePortfolioSegment

cof:CreditCardPortfolioSegment



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value107-64-2252531-106-8979114311141446174366312121
Percentage of AllowanceForLoanAndLeaseLossesPeriodIncreaseDecrease0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommercialPortfolioSegment



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value15245346-203337-24-40-885-29-15-12125125
Percentage of AllowanceForLoanAndLeaseLossesPeriodIncreaseDecrease0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ConsumerPortfolioSegment



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value31-48-7145-77-791129163661100315846
Percentage of AllowanceForLoanAndLeaseLossesPeriodIncreaseDecrease0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:AllowanceForLoanAndLeaseLosses



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value153-88-1798516-150-18666102238183478259385494291
Percentage of AllowanceForLoanAndLeaseLossesPeriodIncreaseDecrease0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:FinancingReceivablePortfolioSegment

us-gaap:AllowanceForLoanAndLeaseLossesWriteOffs

cof:CreditCardPortfolioSegment



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value168715311711178216251528167918251677147115721601141111711215122210889309881022988885995
Percentage of AllowanceForLoanAndLeaseLossesWriteOffs100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommercialPortfolioSegment



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value726623204348721147168140268311264489471191548
Percentage of AllowanceForLoanAndLeaseLossesWriteOffs4.34.31.31.12.63.10.41.28.811.48.91.65.99.65.33.90.85.11.10.91.50.50.8

us-gaap:ConsumerPortfolioSegment



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value534489423471518469414431488435390364364323248291321286225250289264205
Percentage of AllowanceForLoanAndLeaseLossesWriteOffs31.731.924.726.431.930.724.723.629.129.624.822.725.827.620.423.829.530.822.824.529.329.820.6

us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:AllowanceForLoanAndLeaseLosses



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value22932086215722732186204421092276231021102102199118591606152815621420126312261284129411551212133513361294
Percentage of AllowanceForLoanAndLeaseLossesWriteOffs135.9136.3126.1127.6134.5133.8125.6124.7137.7143.4133.7124.4131.8137.1125.8127.8130.5135.8124.1125.6131.0130.5121.80.00.00.0

us-gaap:FinancingReceivablePortfolioSegment

us-gaap:AllowanceForLoanAndLeaseLossesWriteoffsNet

cof:CreditCardPortfolioSegment



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value1314115113201364129511371260137713721155125612711148906949950841655703719691572685
Percentage of AllowanceForLoanAndLeaseLossesWriteoffsNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommercialPortfolioSegment



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value666016141727-71914316313623781086046433739-63
Percentage of AllowanceForLoanAndLeaseLossesWriteoffsNet5.05.21.21.01.32.4-0.61.410.414.110.81.86.811.96.34.80.55.01.00.41.3-1.00.4

us-gaap:ConsumerPortfolioSegment



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value303251172221298262198223312276232218264227146183233203136159215190122
Percentage of AllowanceForLoanAndLeaseLossesWriteoffsNet23.121.813.016.223.023.015.716.222.723.918.517.223.025.115.419.327.731.019.322.131.133.217.8

us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:AllowanceForLoanAndLeaseLosses



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value16831462150815991610142514591618182816061618151014891240115511781078890846881915756812931969917
Percentage of AllowanceForLoanAndLeaseLossesWriteoffsNet128.1127.0114.2117.2124.3125.3115.8117.5133.2139.0128.8118.8129.7136.9121.7124.0128.2135.9120.3122.5132.4132.2118.50.00.00.0

us-gaap:AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-30
Value13913713813614311211512612423511711511598999898808586867487
Percentage of AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AmortizationOfIntangibleAssets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-30
Value222825293043444344616161621018995101103106111110123130136143166161167177191199157625557
Percentage of AmortizationOfIntangibleAssets100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecurities

us-gaap:AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

us-gaap:EmployeeStockOption



Period End2020-03-312019-03-312018-06-302018-03-312017-09-302017-06-302017-03-312016-09-302016-06-302016-03-312015-09-302015-06-302015-03-312014-09-302014-06-302014-03-312013-09-30
Value20000002221122244
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StockCompensationPlan



Period End2020-03-31
Value1
Percentage of AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount57.1

us-gaap:CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-31
Value11551-37881716-361759491861-1668-1021-3555641773-2786-26923112
Percentage of CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations



Period End2020-03-312019-03-312018-12-312018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-03-312011-09-302011-03-312010-09-302010-03-312009-12-312009-09-302009-03-31
Value10-60-302-5911-11-112113-15-129111-46-2266919-4936-4-179-108-18-431523127-118-564913
Percentage of CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations100.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAccretableYieldAccretion



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312016-09-302016-06-302015-12-312015-09-302015-06-302014-12-31
Value384144433837393938464950495355626261
Percentage of CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAccretableYieldAccretion100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAccretableYieldDisposalsOfLoans



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302016-12-312016-09-302016-06-302015-12-312015-09-302015-06-302014-12-31
Value31210021015410020000
Percentage of CertainLoansAcquiredInTransferAccountedForAsDebtSecuritiesAccretableYieldDisposalsOfLoans100.0100.0100.0100.00.00.0100.0100.00.0100.0100.00.00.0100.00.00.00.00.0

us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:IncomeStatementLocation

us-gaap:ChangeInUnrealizedGainLossOnFairValueHedgingInstruments1

us-gaap:InterestRateContract, us-gaap:FairValueHedging, cof:InterestexpenseDeposits



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value287-324615495151-14-37-160
Percentage of ChangeInUnrealizedGainLossOnFairValueHedgingInstruments1100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestRateContract, us-gaap:FairValueHedging, cof:InterestexpenseSecuritizedDebtObligation



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value282-57-10793361-4-17-101
Percentage of ChangeInUnrealizedGainLossOnFairValueHedgingInstruments198.3178.1-21.751.334.740.428.645.963.1

us-gaap:InterestRateContract, us-gaap:FairValueHedging, cof:InterestexpenseSeniorandSubordinatedDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value1068-264216471281447-148-154-357
Percentage of ChangeInUnrealizedGainLossOnFairValueHedgingInstruments1372.1825.0469.6305.8295.8296.01057.1416.2223.1

us-gaap:InterestRateContract, us-gaap:FairValueHedging, cof:InterestincomeInvestmentsecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-33888-80-175-111-2267783100
Percentage of ChangeInUnrealizedGainLossOnFairValueHedgingInstruments1-117.8-275.0-173.9-113.6-116.8-149.7-550.0-224.3-62.5

us-gaap:InterestRateContract, us-gaap:FairValueHedging, cof:NonInterestIncomeOther



Period End2020-03-312019-12-312019-09-302019-06-302018-12-312018-09-30
Value-2340-601100
Percentage of ChangeInUnrealizedGainLossOnFairValueHedgingInstruments1-8.0-125.0-130.47.10.0-0.0

us-gaap:DerivativeInstrumentRisk, us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:IncomeStatementLocation

us-gaap:ChangeInUnrealizedGainLossOnHedgedItemInFairValueHedge1

us-gaap:InterestRateContract, us-gaap:FairValueHedging, cof:InterestexpenseDeposits



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-28631-46-151-92-1511632155
Percentage of ChangeInUnrealizedGainLossOnHedgedItemInFairValueHedge1100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestRateContract, us-gaap:FairValueHedging, cof:InterestexpenseSecuritizedDebtObligation



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-29242-6-102-57-8051598
Percentage of ChangeInUnrealizedGainLossOnHedgedItemInFairValueHedge1102.1135.513.067.562.053.031.246.963.2

us-gaap:InterestRateContract, us-gaap:FairValueHedging, cof:InterestexpenseSeniorandSubordinatedDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-1091291-261-511-320-479136129325
Percentage of ChangeInUnrealizedGainLossOnHedgedItemInFairValueHedge1381.5938.7567.4338.4347.8317.2850.0403.1209.7

us-gaap:InterestRateContract, us-gaap:FairValueHedging, cof:InterestincomeInvestmentsecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value338-8781174110226-79-81-99
Percentage of ChangeInUnrealizedGainLossOnHedgedItemInFairValueHedge1-118.2-280.6-176.1-115.2-119.6-149.7-493.8-253.1-63.9

us-gaap:InterestRateContract, us-gaap:FairValueHedging, cof:NonInterestIncomeOther



Period End2020-03-312019-12-312019-09-302019-06-302018-12-312018-09-30
Value23-3958-1000
Percentage of ChangeInUnrealizedGainLossOnHedgedItemInFairValueHedge1-8.0-125.8-126.16.6-0.00.0

us-gaap:CommonStockDividendsPerShareDeclared



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312011-03-312010-09-302010-03-312009-12-312009-09-302009-03-31
Value0.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.40.39999999999999990.40.40.30.299999999999999930.30.30.30.299999999999999930.30.30.050.050.049999999999999990.050.0500000000000000440.049999999999999990.375
Percentage of CommonStockDividendsPerShareDeclared100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:CommonStockDividendsShares

us-gaap:CommonStock



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-31
Value23213.04646.08680.032700.04196.04371.022467.0
Percentage of CommonStockDividendsShares100.0100.0100.0100.0100.0100.0100.0

us-gaap:CommunicationsAndInformationTechnology



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value302346312329303326311317306306294289288412252262243247226208202203196203196218224233210205198203173178162164178164169171176195199
Percentage of CommunicationsAndInformationTechnology100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtAndEquitySecuritiesGainLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value0-1851524-20-196-18168
Percentage of DebtAndEquitySecuritiesGainLoss0.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtSecuritiesAvailableForSaleGainLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value1-1851524-20-196-18168
Percentage of DebtSecuritiesAvailableForSaleGainLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DebtSecuritiesAvailableForSaleRealizedGain



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value051524140821118
Percentage of DebtSecuritiesAvailableForSaleRealizedGain0.0100.0100.0100.0100.0100.00.0100.0100.0100.0

us-gaap:DebtSecuritiesAvailableForSaleRealizedGainLossExcludingOtherThanTemporaryImpairment



Period End2019-12-312019-09-302018-12-312018-09-302017-12-312017-09-30
Value-185-194169
Percentage of DebtSecuritiesAvailableForSaleRealizedGainLossExcludingOtherThanTemporaryImpairment100.0100.0100.0100.0100.0100.0

us-gaap:DebtSecuritiesAvailableForSaleRealizedLossExcludingOtherThanTemporaryImpairment



Period End2019-12-312019-09-302019-06-302018-12-312018-09-302018-06-302017-12-312017-09-30
Value180020012049
Percentage of DebtSecuritiesAvailableForSaleRealizedLossExcludingOtherThanTemporaryImpairment100.00.00.0100.00.0100.0100.0100.0

us-gaap:DebtSecuritiesHeldToMaturityTransferAmount



Period End2019-12-31
Value33200
Percentage of DebtSecuritiesHeldToMaturityTransferAmount100.0

us-gaap:DeferredIncomeTaxExpenseBenefit



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value-748-224-57-76615655455401755-86-98-137-65-244-238-139
Percentage of DeferredIncomeTaxExpenseBenefit100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DepreciationAndAmortization



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-03-312011-09-302011-03-312010-09-302010-03-312009-12-312009-09-302009-03-31
Value89390584988170467558958255072158856556660961261659154254652948347051550351441849581134160556523411016710614797204151
Percentage of DepreciationAndAmortization100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DerivativeInstrumentRisk, us-gaap:IncomeStatementLocation

us-gaap:DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet

us-gaap:InterestRateContract, cof:OtherNonInterestIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value3323291511175252211112317
Percentage of DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherContract, cof:OtherNonInterestIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value-1-1-70-21-20-200000
Percentage of DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet-3.0-4.3-24.10.0-18.25.9-40.00.0-90.90.00.00.00.0

us-gaap:DerivativeInstrumentRisk, us-gaap:IncomeStatementLocation, us-gaap:UnderlyingAssetClass

us-gaap:CommodityContract, cof:OtherNonInterestIncome, cof:CustomerAccommodation



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value170872804435
Percentage of DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet51.50.027.646.718.247.10.016.018.227.345.5

us-gaap:ForeignExchangeContract, cof:OtherNonInterestIncome, cof:CustomerAccommodation



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value33343212221
Percentage of DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet9.113.010.326.727.311.820.08.09.118.29.1

us-gaap:InterestRateContract, cof:OtherNonInterestIncome, cof:CustomerAccommodation



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value132018467410465
Percentage of DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet39.487.062.126.754.541.280.040.018.254.545.5

us-gaap:InterestRateContract, cof:OtherNonInterestIncome, cof:OtherInterestRateExposures



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value18-1-1-1401119121225
Percentage of DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet54.5-4.3-3.4-93.30.05.9220.036.054.5109.1227.3

us-gaap:IncomeStatementLocation

cof:OtherNonInterestIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-31
Value50212119191425223362317
Percentage of DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet151.591.372.46.781.8111.8280.0100.09.1209.1327.3100.0100.0

us-gaap:DividendsCommonStock



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-03-312011-03-312010-09-302010-03-312009-12-312009-09-302009-03-31
Value1851901881911891911961971951951951951942022052112142172181671701741721771763029292423-2322404-23148
Percentage of DividendsCommonStock100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:AdditionalPaidInCapital



Period End2020-03-312019-09-302019-06-302019-03-312018-09-302018-06-302018-03-312016-03-312015-12-312015-09-302015-06-302015-03-31
Value-2013-10228-712
Percentage of DividendsCommonStock-1.10.00.51.6-0.50.01.00.93.7-3.20.51.2

us-gaap:RetainedEarnings



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-03-312011-03-312010-09-302010-03-312009-12-312009-09-302009-03-31
Value1871901891941891921961991951951961971952022062132142182191691701741721771763029292423-2322404-23148
Percentage of DividendsCommonStock101.1100.0100.5101.6100.0100.5100.0101.0100.0100.0100.5101.0100.5100.0100.5100.9100.0100.5100.5101.2100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:DividendsPreferredStockCash



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value555380528053805280528053753765376829293221
Percentage of DividendsPreferredStockCash100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementEquityComponents

us-gaap:RetainedEarnings



Period End2020-03-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-31
Value555380528053805280528053753765376829293221
Percentage of DividendsPreferredStockCash100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring, cof:NetDerivativeAssetsLiabilities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value18-51-266-2-2-221-2
Percentage of FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring, us-gaap:AvailableforsaleSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value3891083879
Percentage of FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss16.7-160.0900.0-500.0133.350.0-400.0-350.0-40.9

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring, us-gaap:ResidentialMortgageBackedSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value389108387925
Percentage of FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss16.7-160.0900.0-500.0133.350.0-400.0-350.0-40.9200.0-250.0

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring, us-gaap:RetainedInterest



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-7-27-122-3-4-2-124-6-10
Percentage of FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLoss-38.9540.0-100.0-1100.0-50.0-66.7100.0600.0-18.2-600.0500.0

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

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring, us-gaap:AvailableforsaleSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value3810987799
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring, us-gaap:ResidentialMortgageBackedSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value3810987799865
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring, us-gaap:RetainedInterest



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-70-122-3-4-2-124-6-10
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1-233.30.0-10.0244.4-37.5-57.1-28.6-133.344.40.00.0

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

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring, us-gaap:AvailableforsaleSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-53-80211-1729-2
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss100.0100.00.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring, us-gaap:ResidentialMortgageBackedSecurities



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-53-80211-1729-2-5-37
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss100.0100.00.0100.0100.0100.0100.0100.0100.00.00.0

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

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring, us-gaap:CommercialMortgageBackedSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value000000000050
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases0.00.00.00.00.00.00.00.00.00.0100.0

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

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring, us-gaap:CommercialMortgageBackedSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value000000000500
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales0.00.00.00.00.00.00.00.00.0100.00.0

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring, us-gaap:ResidentialMortgageBackedSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value0000000000111
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales0.00.00.00.00.00.00.00.00.00.00.0

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

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring, us-gaap:AvailableforsaleSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value182019131317212322
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring, us-gaap:CommercialMortgageBackedSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value10101102111
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements5.60.05.30.07.75.90.08.74.50.00.0

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring, us-gaap:ResidentialMortgageBackedSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value1720181312161621212323
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements94.4100.094.7100.092.394.176.291.395.50.00.0

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring, us-gaap:RetainedInterest



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value0416900000000
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements0.0205.0363.20.00.00.00.00.00.00.00.0

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

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring, us-gaap:AvailableforsaleSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value3395997178130461
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring, us-gaap:CommercialMortgageBackedSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value245000000000
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel372.755.60.00.00.00.00.00.00.00.00.0

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring, us-gaap:ResidentialMortgageBackedSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value945997178130461138222
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel327.344.4100.0100.0100.0100.0100.0100.0100.00.00.0

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

us-gaap:FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring, us-gaap:AvailableforsaleSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value271141423684617347
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring, us-gaap:CommercialMortgageBackedSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value0.00.00.00.00.00.00.00.00.01000000.00.0
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel30.00.00.00.00.00.00.00.00.00.00.0

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring, us-gaap:ResidentialMortgageBackedSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value2711414236846173472425
Percentage of FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.0

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInEarnings

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value202-1056-2-2-221-2
Percentage of FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationGainLossIncludedInEarnings100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationIssues

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value245-8-7-6-121861118
Percentage of FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationIssues100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationSettlements

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value2-13-12-8-1917-2111613
Percentage of FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationSettlements100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueByFairValueHierarchyLevel, us-gaap:FairValueByMeasurementFrequency

us-gaap:FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationTransfersOutOfLevel3

us-gaap:FairValueInputsLevel3, us-gaap:FairValueMeasurementsRecurring



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value2031200-1001
Percentage of FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationTransfersOutOfLevel3100.00.0100.0100.0100.00.00.0100.00.00.0100.0

us-gaap:FinancingReceivablePortfolioSegment

us-gaap:FinancingReceivableAllowanceForCreditLossPurchasedWithCreditDeteriorationIncrease

cof:CreditCardPortfolioSegment



Period End2020-03-31
Value2266
Percentage of FinancingReceivableAllowanceForCreditLossPurchasedWithCreditDeteriorationIncrease100.0

us-gaap:CommercialPortfolioSegment



Period End2020-03-31
Value696
Percentage of FinancingReceivableAllowanceForCreditLossPurchasedWithCreditDeteriorationIncrease30.7

us-gaap:ConsumerPortfolioSegment



Period End2020-03-31
Value614
Percentage of FinancingReceivableAllowanceForCreditLossPurchasedWithCreditDeteriorationIncrease27.1

us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:AllowanceForLoanAndLeaseLosses



Period End2020-03-31
Value3576
Percentage of FinancingReceivableAllowanceForCreditLossPurchasedWithCreditDeteriorationIncrease157.8

us-gaap:FinancingReceivablePortfolioSegment

us-gaap:FinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery

cof:CreditCardPortfolioSegment



Period End2020-03-31
Value1436
Percentage of FinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery100.0

us-gaap:CommercialPortfolioSegment



Period End2020-03-31
Value109
Percentage of FinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery7.6

us-gaap:ConsumerPortfolioSegment



Period End2020-03-31
Value246
Percentage of FinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery17.1

us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:AllowanceForLoanAndLeaseLosses



Period End2020-03-31
Value1791
Percentage of FinancingReceivableAllowanceForCreditLossWriteoffAfterRecovery124.7

us-gaap:FinancingReceivablePortfolioSegment

us-gaap:FinancingReceivableAllowanceForCreditLossesRecovery

cof:CreditCardPortfolioSegment



Period End2020-03-31
Value413
Percentage of FinancingReceivableAllowanceForCreditLossesRecovery100.0

us-gaap:CommercialPortfolioSegment



Period End2020-03-31
Value3
Percentage of FinancingReceivableAllowanceForCreditLossesRecovery0.7

us-gaap:ConsumerPortfolioSegment



Period End2020-03-31
Value250
Percentage of FinancingReceivableAllowanceForCreditLossesRecovery60.5

us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:AllowanceForLoanAndLeaseLosses



Period End2020-03-31
Value666
Percentage of FinancingReceivableAllowanceForCreditLossesRecovery161.3

us-gaap:FinancingReceivablePortfolioSegment

us-gaap:FinancingReceivableAllowanceForCreditLossesWriteOffs

cof:CreditCardPortfolioSegment



Period End2020-03-31
Value1849
Percentage of FinancingReceivableAllowanceForCreditLossesWriteOffs100.0

us-gaap:CommercialPortfolioSegment



Period End2020-03-31
Value112
Percentage of FinancingReceivableAllowanceForCreditLossesWriteOffs6.1

us-gaap:ConsumerPortfolioSegment



Period End2020-03-31
Value496
Percentage of FinancingReceivableAllowanceForCreditLossesWriteOffs26.8

us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:AllowanceForLoanAndLeaseLosses



Period End2020-03-31
Value2457
Percentage of FinancingReceivableAllowanceForCreditLossesWriteOffs132.9

us-gaap:TypeOfArrangement

cof:LossSharingAgreement



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-31
Value302287100105108969792978766676568565352325-47-45-44-43-40-39-42
Percentage of FinancingReceivableAllowanceForCreditLossesWriteOffs16.30.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:FinancingReceivableModificationsPostModificationRecordedInvestment2



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value292293246186273244271290248321468356375433507442272
Percentage of FinancingReceivableModificationsPostModificationRecordedInvestment2100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivablePortfolioSegment

cof:CreditCardPortfolioSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value1401371281141451431511391631601481261411341239598
Percentage of FinancingReceivableModificationsPostModificationRecordedInvestment247.946.852.061.353.158.655.747.965.749.831.635.437.630.924.321.536.0

us-gaap:CommercialPortfolioSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value26785115552573103157520615914918527125472
Percentage of FinancingReceivableModificationsPostModificationRecordedInvestment28.926.620.78.120.110.226.935.56.023.444.044.739.742.753.557.526.5

us-gaap:ConsumerPortfolioSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value126786757737647487086114718511411393102
Percentage of FinancingReceivableModificationsPostModificationRecordedInvestment243.226.627.230.626.731.117.316.628.226.824.419.922.726.322.321.037.5

us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:CommercialPortfolioSegment, cof:CommercialAndIndustrial



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value773511421235086117420213414718525725447
Percentage of FinancingReceivableModificationsPostModificationRecordedInvestment22.424.920.77.57.79.418.529.74.423.143.237.639.242.750.757.517.3

us-gaap:CommercialPortfolioSegment, cof:CommercialAndMultifamilyRealEstate



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value195003422217203242013025
Percentage of FinancingReceivableModificationsPostModificationRecordedInvestment26.51.70.00.012.50.88.15.90.80.00.66.70.50.02.60.09.2

us-gaap:CommercialPortfolioSegment, cof:CommercialLending



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value785114552572103137420515814918527025472
Percentage of FinancingReceivableModificationsPostModificationRecordedInvestment226.620.77.520.110.226.635.55.223.143.844.439.742.753.357.526.5

us-gaap:CommercialPortfolioSegment, cof:SmallTicketRealEstate



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value0010010211100100
Percentage of FinancingReceivableModificationsPostModificationRecordedInvestment20.00.00.50.00.00.40.00.80.30.20.30.00.00.20.00.0

us-gaap:ConsumerPortfolioSegment, cof:RetailBanking



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value30151204207422943
Percentage of FinancingReceivableModificationsPostModificationRecordedInvestment21.00.00.42.70.40.80.01.40.80.01.51.10.50.51.80.91.1

us-gaap:ConsumerPortfolioSegment, us-gaap:AutomobileLoan



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value1237866527274474462841046175102917786
Percentage of FinancingReceivableModificationsPostModificationRecordedInvestment242.126.626.828.026.430.317.315.225.026.222.217.120.023.617.917.431.6

us-gaap:FinancingReceivablePortfolioSegment, us-gaap:GeographicDistribution

cof:CreditCardPortfolioSegment, us-gaap:GeographicDistributionDomestic



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value899485749898105961131151078797100886262
Percentage of FinancingReceivableModificationsPostModificationRecordedInvestment230.532.134.639.835.940.238.733.145.635.822.924.425.923.117.414.022.8

cof:CreditCardPortfolioSegment, us-gaap:GeographicDistributionForeign



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value5143434047454643504541394434353336
Percentage of FinancingReceivableModificationsPostModificationRecordedInvestment217.514.717.521.517.218.417.014.820.214.08.811.011.77.96.97.513.2

us-gaap:FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value30025.030053.029175.031082.031846.034645.031012.031361.032102.031536.028986.029555.026446.026047.021957.022292.021301.023900.021094.020422.019977.021015.020698.021116.022945.027214.025140.022208.024711.0
Percentage of FinancingReceivableModificationsSubsequentDefaultNumberOfContracts1100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivablePortfolioSegment

cof:CreditCardPortfolioSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value28743.028334.027723.029766.030733.033159.029087.029560.030278.029006.026543.026983.024230.023330.019808.020203.019407.021415.018781.018285.018215.018994.018991.019442.0
Percentage of FinancingReceivableModificationsSubsequentDefaultNumberOfContracts195.794.395.095.896.595.793.894.394.392.091.691.391.689.690.290.691.189.689.089.591.290.491.892.1

us-gaap:CommercialPortfolioSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value6.01.00.00.00.08.06.07.06.068.0141.022.015.0112.024.05.017.01.06.03.00.08.018.04.0
Percentage of FinancingReceivableModificationsSubsequentDefaultNumberOfContracts10.00.00.00.00.00.00.00.00.00.20.50.10.10.40.10.00.10.00.00.00.00.00.10.0

us-gaap:ConsumerPortfolioSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value1276.01718.01452.01316.01113.01478.01919.01794.01818.02462.02302.02550.02201.02605.02125.02084.01877.02484.02307.02134.01762.02013.01689.01670.0
Percentage of FinancingReceivableModificationsSubsequentDefaultNumberOfContracts14.25.75.04.23.54.36.25.75.77.87.98.68.310.09.79.38.810.410.910.48.89.68.27.9

us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:CommercialPortfolioSegment, cof:CommercialAndIndustrial



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value6.01.00.00.00.08.05.07.06.068.0141.021.014.0108.022.03.017.01.03.03.00.00.00.01.0
Percentage of FinancingReceivableModificationsSubsequentDefaultNumberOfContracts10.00.00.00.00.00.00.00.00.00.20.50.10.10.40.10.00.10.00.00.00.00.00.00.0

us-gaap:CommercialPortfolioSegment, cof:CommercialAndMultifamilyRealEstate



Period End2019-12-312019-09-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value0.00.00.01.00.00.00.00.00.00.00.01.00.00.00.00.00.00.01.00.01.0
Percentage of FinancingReceivableModificationsSubsequentDefaultNumberOfContracts10.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:CommercialPortfolioSegment, cof:CommercialLending



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value1.00.00.00.08.06.07.06.068.0141.021.014.0108.023.03.017.01.03.03.00.01.00.02.0
Percentage of FinancingReceivableModificationsSubsequentDefaultNumberOfContracts10.00.00.00.00.00.00.00.00.20.50.10.10.40.10.00.10.00.00.00.00.00.00.0

us-gaap:ConsumerPortfolioSegment, cof:RetailBanking



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value1.06.06.04.08.05.012.01.08.012.09.09.011.011.012.010.015.06.06.04.010.022.013.015.0
Percentage of FinancingReceivableModificationsSubsequentDefaultNumberOfContracts10.00.00.00.00.00.00.00.00.00.00.00.00.00.00.10.00.10.00.00.00.10.10.10.1

us-gaap:ConsumerPortfolioSegment, us-gaap:AutomobileLoan



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value1275.01712.01446.01312.01105.01473.01907.01793.01807.02446.02288.02533.02179.02578.02096.02061.01852.02475.02297.02128.01747.01979.01674.01651.0
Percentage of FinancingReceivableModificationsSubsequentDefaultNumberOfContracts14.25.75.04.23.54.36.15.75.67.87.98.68.29.99.59.28.710.410.910.48.79.48.17.8

us-gaap:ConsumerPortfolioSegment, us-gaap:ResidentialMortgage



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value0.00.00.00.00.00.00.03.04.05.08.011.016.017.013.010.03.04.02.05.012.02.04.0
Percentage of FinancingReceivableModificationsSubsequentDefaultNumberOfContracts10.00.00.00.00.00.00.00.00.00.00.00.00.10.10.10.00.00.00.00.00.10.00.0

us-gaap:FinancingReceivablePortfolioSegment, us-gaap:GeographicDistribution

cof:CreditCardPortfolioSegment, us-gaap:GeographicDistributionDomestic



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value10886.010859.010619.011581.014027.016542.013983.014206.016339.015566.013528.013222.012805.012287.09138.010231.010594.012993.010487.09661.09667.010312.09882.09559.0
Percentage of FinancingReceivableModificationsSubsequentDefaultNumberOfContracts136.336.136.437.344.047.745.145.350.949.446.744.748.447.241.645.949.754.449.747.348.449.147.745.3

cof:CreditCardPortfolioSegment, us-gaap:GeographicDistributionForeign



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value17857.017475.017104.018185.016706.016617.015104.015354.013939.013440.013015.013761.011425.011043.010670.09972.08813.08422.08294.08624.08548.08682.09109.09883.0
Percentage of FinancingReceivableModificationsSubsequentDefaultNumberOfContracts159.558.158.658.552.548.048.749.043.442.644.946.643.242.448.644.741.435.239.342.242.841.344.046.8

us-gaap:FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value929966717011911388117145182176912141757685706780576959677686887782
Percentage of FinancingReceivableModificationsSubsequentDefaultRecordedInvestment1100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivablePortfolioSegment

cof:CreditCardPortfolioSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value485048545761545760585252424535373840373936384045
Percentage of FinancingReceivableModificationsSubsequentDefaultRecordedInvestment152.250.572.776.181.451.347.864.851.340.028.629.546.221.020.048.744.757.155.248.863.255.167.867.2

us-gaap:CommercialPortfolioSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value282500041371035581038920136110142302170502
Percentage of FinancingReceivableModificationsSubsequentDefaultRecordedInvestment130.425.30.00.00.034.532.711.429.940.056.650.622.063.662.918.427.10.03.021.20.07.20.03.0

us-gaap:ConsumerPortfolioSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value162418171317222122292735293330252430282421261920
Percentage of FinancingReceivableModificationsSubsequentDefaultRecordedInvestment117.424.227.323.918.614.319.523.918.820.014.819.931.915.417.132.928.242.941.830.036.837.732.229.9

us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:CommercialPortfolioSegment, cof:CommercialAndIndustrial



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value282500041341035581038919136108142302170001
Percentage of FinancingReceivableModificationsSubsequentDefaultRecordedInvestment130.425.30.00.00.034.530.111.429.940.056.650.620.963.661.718.427.10.03.021.20.00.00.01.5

us-gaap:CommercialPortfolioSegment, cof:CommercialAndMultifamilyRealEstate



Period End2019-12-312019-09-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value0003000000-12000000500
Percentage of FinancingReceivableModificationsSubsequentDefaultRecordedInvestment10.00.00.02.70.00.00.00.00.00.0-0.51.10.00.00.00.00.00.07.20.00.0

us-gaap:CommercialPortfolioSegment, cof:CommercialLending



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value2500041371035581038919135110142302170501
Percentage of FinancingReceivableModificationsSubsequentDefaultRecordedInvestment125.30.00.00.034.532.711.429.940.056.650.620.963.162.918.427.10.03.021.20.07.20.01.5

us-gaap:ConsumerPortfolioSegment, cof:RetailBanking



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value010100200012124121001102
Percentage of FinancingReceivableModificationsSubsequentDefaultRecordedInvestment10.01.00.01.40.00.01.80.00.00.00.51.11.10.92.31.32.41.40.00.01.81.40.03.0

us-gaap:ConsumerPortfolioSegment, us-gaap:AutomobileLoan



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value162318161317202121282630252924222128272420231818
Percentage of FinancingReceivableModificationsSubsequentDefaultRecordedInvestment117.423.227.322.518.614.317.723.917.919.314.317.027.513.613.728.924.740.040.330.035.133.330.526.9

us-gaap:ConsumerPortfolioSegment, us-gaap:ResidentialMortgage



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value00000001103322211100210
Percentage of FinancingReceivableModificationsSubsequentDefaultRecordedInvestment10.00.00.00.00.00.00.00.90.70.01.73.30.91.12.61.21.41.50.00.02.91.70.0

us-gaap:FinancingReceivablePortfolioSegment, us-gaap:GeographicDistribution

cof:CreditCardPortfolioSegment, us-gaap:GeographicDistributionDomestic



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value222222262933293034322825262415161821181616161615
Percentage of FinancingReceivableModificationsSubsequentDefaultRecordedInvestment123.922.233.336.641.427.725.734.129.122.115.414.228.611.28.621.121.230.026.920.028.123.227.122.4

cof:CreditCardPortfolioSegment, us-gaap:GeographicDistributionForeign



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value262826282828252726262427162120212019192320222430
Percentage of FinancingReceivableModificationsSubsequentDefaultRecordedInvestment128.328.339.439.440.023.522.130.722.217.913.215.317.69.811.427.623.527.128.428.835.131.940.744.8

us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable, us-gaap:LoanRestructuringModification

us-gaap:FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown

us-gaap:CommercialPortfolioSegment, cof:CommercialAndIndustrial, us-gaap:PrincipalForgiveness



Period End2019-12-312019-09-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value0000000000026000000100
Percentage of FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown0.00.00.00.00.00.00.00.00.00.00.0100.00.00.00.00.00.00.0100.00.00.0

us-gaap:CommercialPortfolioSegment, cof:CommercialAndMultifamilyRealEstate, us-gaap:PrincipalForgiveness



Period End2019-12-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value00000000003000001002
Percentage of FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown0.00.00.00.00.00.00.00.00.00.011.50.00.00.00.00.00.00.00.00.0

us-gaap:CommercialPortfolioSegment, cof:CommercialLending, us-gaap:PrincipalForgiveness



Period End2019-12-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value000000000029000001102
Percentage of FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown0.00.00.00.00.00.00.00.00.00.0111.50.00.00.00.00.00.0100.00.00.0

us-gaap:ConsumerPortfolioSegment, cof:RetailBanking, us-gaap:PrincipalForgiveness



Period End2019-12-312019-09-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value0.00.00.00.00.00.00.00.00.00.00.00.01000000.00.00.00.00.00.00.00.00.0
Percentage of FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown0.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.00.0

us-gaap:ConsumerPortfolioSegment, us-gaap:AutomobileLoan, us-gaap:PrincipalForgiveness



Period End2019-12-312019-09-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value01001000072121152124242322272825
Percentage of FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown0.00.00.00.00.00.00.00.00.00.00.080.80.00.00.00.00.00.02700.00.00.0

us-gaap:FinancingReceivablePortfolioSegment, us-gaap:LoanRestructuringModification

us-gaap:CommercialPortfolioSegment, us-gaap:PrincipalForgiveness



Period End2019-12-312019-09-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value0000000000029000001102
Percentage of FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown0.00.00.00.00.00.00.00.00.00.00.0111.50.00.00.00.00.00.0100.00.00.0

us-gaap:ConsumerPortfolioSegment, us-gaap:PrincipalForgiveness



Period End2019-12-312019-09-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value01001000072121162124242322272825
Percentage of FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown0.00.00.00.00.00.00.00.00.00.00.080.80.00.00.00.00.00.02700.00.00.0

us-gaap:LoanRestructuringModification

us-gaap:PrincipalForgiveness



Period End2019-12-312019-09-302018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-30
Value01001000072150162124242323282827
Percentage of FinancingReceivablesImpairedTroubledDebtRestructuringWriteDown0.00.00.00.00.00.00.00.00.00.00.0192.30.00.00.00.00.00.02800.00.00.0

us-gaap:DerivativeInstrumentsGainLossByHedgingRelationship, us-gaap:IncomeStatementLocation

us-gaap:GainLossOnFairValueHedgesRecognizedInEarnings

us-gaap:FairValueHedging, cof:InterestexpenseDeposits



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-1-14-26-30-33-28-23-26-7
Percentage of GainLossOnFairValueHedgesRecognizedInEarnings100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FairValueHedging, cof:InterestexpenseSecuritizedDebtObligation



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value2-12-21-29-30-28-20-20-8
Percentage of GainLossOnFairValueHedgesRecognizedInEarnings-200.085.780.896.790.9100.087.076.9114.3

us-gaap:FairValueHedging, cof:InterestexpenseSeniorandSubordinatedDebt



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value1544-49-50-50-36-20-21-22
Percentage of GainLossOnFairValueHedgesRecognizedInEarnings-1500.0-314.3188.5166.7151.5128.687.080.8314.3

us-gaap:FairValueHedging, cof:InterestincomeInvestmentsecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-31
Value-11-9-2-21-1-7-7-7
Percentage of GainLossOnFairValueHedgesRecognizedInEarnings1100.064.37.76.7-3.03.630.426.9100.0

us-gaap:FairValueHedging, cof:NonInterestIncomeOther



Period End2020-03-312019-12-312019-09-302019-06-302018-12-312018-09-30
Value01-2100
Percentage of GainLossOnFairValueHedgesRecognizedInEarnings-0.0-7.17.7-3.3-0.0-0.0

us-gaap:GainLossOnSalesOfLoansNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-03-312011-09-302011-03-312010-09-302010-03-312009-12-312009-09-302009-03-31
Value4-3-451691064062730239103201245113653413151379581011181675-26-1600-1
Percentage of GainLossOnSalesOfLoansNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0

us-gaap:GoodwillOtherIncreaseDecrease



Period End2020-03-312019-12-312019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-30
Value8-5-2215-3-1-2-3-242
Percentage of GoodwillOtherIncreaseDecrease100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:StatementBusinessSegments

us-gaap:CreditCard



Period End2020-03-312019-12-312019-03-312018-12-31
Value8-5-22
Percentage of GoodwillOtherIncreaseDecrease100.0100.0100.0100.0

us-gaap:ImpairedFinancingReceivableInterestIncomeAccrualMethod



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-03-31
Value30313233343635404040363946454343394037333940542828
Percentage of ImpairedFinancingReceivableInterestIncomeAccrualMethod100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:FinancingReceivablePortfolioSegment

cof:CreditCardPortfolioSegment



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value17181719191819191919181817181617
Percentage of ImpairedFinancingReceivableInterestIncomeAccrualMethod56.758.153.157.655.950.054.347.547.547.550.046.237.040.037.239.5

us-gaap:CommercialPortfolioSegment



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value3354474766645443
Percentage of ImpairedFinancingReceivableInterestIncomeAccrualMethod10.09.715.612.111.819.411.417.515.015.016.710.310.98.99.37.0

us-gaap:ConsumerPortfolioSegment



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value10101010111112141515121724232323
Percentage of ImpairedFinancingReceivableInterestIncomeAccrualMethod33.332.331.230.332.430.634.335.037.537.533.343.652.251.153.553.5

us-gaap:FinancingReceivablePortfolioSegment, us-gaap:FinancingReceivableRecordedInvestmentByClassOfFinancingReceivable

us-gaap:CommercialPortfolioSegment, cof:CommercialAndIndustrial



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value3344464655534432
Percentage of ImpairedFinancingReceivableInterestIncomeAccrualMethod10.09.712.512.111.816.711.415.012.512.513.97.78.78.97.04.7

us-gaap:CommercialPortfolioSegment, cof:CommercialAndMultifamilyRealEstate



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value0.00.01000000.00.00.01000000.00.01000000.01000000.01000000.01000000.01000000.01000000.00.01000000.01000000.0
Percentage of ImpairedFinancingReceivableInterestIncomeAccrualMethod0.00.03.10.00.02.80.02.52.52.52.82.62.20.02.32.3

us-gaap:CommercialPortfolioSegment, cof:CommercialLending



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value3354474766645443
Percentage of ImpairedFinancingReceivableInterestIncomeAccrualMethod10.09.715.612.111.819.411.417.515.015.016.710.310.98.99.37.0

us-gaap:ConsumerPortfolioSegment, cof:RetailBanking



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value0.00.01000000.00.01000000.00.01000000.00.00.00.00.01000000.01000000.00.01000000.00.0
Percentage of ImpairedFinancingReceivableInterestIncomeAccrualMethod0.00.03.10.02.90.02.90.00.00.00.02.62.20.02.30.0

us-gaap:ConsumerPortfolioSegment, us-gaap:AutomobileLoan



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value1010910101111131413111522212122
Percentage of ImpairedFinancingReceivableInterestIncomeAccrualMethod33.332.328.130.329.430.631.432.535.032.530.638.547.846.748.851.2

us-gaap:ConsumerPortfolioSegment, us-gaap:ResidentialMortgage



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value0000000112111211
Percentage of ImpairedFinancingReceivableInterestIncomeAccrualMethod0.00.00.00.00.00.00.02.52.55.02.82.62.24.42.32.3

us-gaap:FinancingReceivablePortfolioSegment, us-gaap:GeographicDistribution

cof:CreditCardPortfolioSegment, us-gaap:GeographicDistributionDomestic



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value14141415161516161616161515151414
Percentage of ImpairedFinancingReceivableInterestIncomeAccrualMethod46.745.243.845.547.141.745.740.040.040.044.438.532.633.332.632.6

cof:CreditCardPortfolioSegment, us-gaap:GeographicDistributionForeign



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value3434333333232323
Percentage of ImpairedFinancingReceivableInterestIncomeAccrualMethod10.012.99.412.18.88.38.67.57.57.55.67.74.36.74.77.0

us-gaap:IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value0-2492-31-113-109-30-1115-2-11-1-512-4111929-44-1030-23-13-119-78
Percentage of IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity0.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value0.00.010.020.0-0.010.0-0.020.01-0.23000000000000004-0.06-0.020.030.0-0.020.0-0.010.02-0.010.020.030.05-0.08-0.020.05-0.04-0.02-0.2-0.13-0.010000000000000009-0.02-0.17-0.2-0.11-0.07-0.03-0.03-0.45-0.18-0.06-0.09-0.01-0.06
Percentage of IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare0.0100.0100.00.0100.00.0100.0100.0100.0100.0100.0100.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value0.00.010.020.0-0.010.0-0.020.01-0.22000000000000003-0.06-0.020.030.0-0.020.0-0.010.02-0.010.020.030.05-0.08-0.020.05-0.03-0.02-0.2-0.130.0-0.02-0.17-0.2-0.11-0.07-0.03-0.03-0.45-0.18-0.06-0.09-0.01-0.06
Percentage of IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare0.0100.0100.00.0100.00.0100.0100.0100.0100.0100.0100.00.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncomeTaxesPaid



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-31
Value642621831117032204118534083124333457047910175561540262887494225903-1947160457967
Percentage of IncomeTaxesPaid100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInAccruedInterestReceivableNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-03-312011-09-302011-03-312010-09-302010-03-312009-12-312009-09-302009-03-31
Value-715083-7119225-3-4011052-2217961515335345-25-1167-205148-93114-15076-31680-9-42-69455220219140-12
Percentage of IncreaseDecreaseInAccruedInterestReceivableNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInDeposits



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-03-312011-09-302011-03-312010-09-302010-03-312009-12-312009-09-302009-03-31
Value670255712559-73052432410-1024-259972904725-696-14434407107824918-724405548154120-166248901282-1628-24363799-2310-3034-2552-76-757-678387721973236188119771306-2222-1061
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:IncreaseDecreaseInInterestPayableNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-03-312011-09-302011-03-312010-09-302010-03-312009-12-312009-09-302009-03-31
Value-8069-6755-7667-5997-60112-76116-6790-6484-82101-6467-5968-6050-4831-4814-14051-94-82-68-77-7912-74-77-19
Percentage of IncreaseDecreaseInInterestPayableNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncreaseDecreaseInOtherOperatingAssets



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-03-312011-09-302011-03-312010-09-302010-03-312009-12-312009-09-302009-03-31
Value-13251190-601-352-899-5948377-2671495533-223-109113791931136-801805-514894-187915620274-15011409-875319-6081257-200-686553474-174-1139-1612569-164
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:IncreaseDecreaseInOtherOperatingLiabilities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-03-312011-09-302011-03-312010-09-302010-03-312009-12-312009-09-302009-03-31
Value595716-11561077-443-697260523-163913551066186-1450847412451303-6591254-12-8304293114-78252173423-778-8801220-572969-5061501-948-233-596-1525
Percentage of IncreaseDecreaseInOtherOperatingLiabilities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncrementalCommonSharesAttributableToCallOptionsAndWarrants



Period End2019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-30
Value000000000001011102220355043
Percentage of IncrementalCommonSharesAttributableToCallOptionsAndWarrants0.00.00.00.0100.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:IncrementalCommonSharesAttributableToContingentlyIssuableShares



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-09-302009-06-30
Value001010111011101110111011101112100000
Percentage of IncrementalCommonSharesAttributableToContingentlyIssuableShares0.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.00.00.00.00.0

us-gaap:IncrementalCommonSharesAttributableToShareBasedPaymentArrangements



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-09-302009-06-30
Value00111011202220121022202220212211110
Percentage of IncrementalCommonSharesAttributableToShareBasedPaymentArrangements0.0100.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.00.0100.0100.0100.00.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.00.0

us-gaap:InterestAndDividendIncomeOperating



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value7109727070757076709270486895659666376604642061286070600957945571551753845164493749745045488747124753483949985010505151155254461639793835369937523815383540292595270227172650
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:InterestAndDividendIncomeSecurities



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value530544583629655627593539452431431433416393386405415401386382406405398409416414396391374361335335298264313316347342348404399412395
Percentage of InterestAndDividendIncomeSecurities100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestAndFeeIncomeLoansAndLeases



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-30
Value6542668264296383636863586247598961346133596056695626558753835148508549614753453145404613446342794307439845794596464947274903
Percentage of InterestAndFeeIncomeLoansAndLeases100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestExpenseDeposits



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value731832901870817756681622539457410382353332306292283277271272271269271272276288309318326348371373311294307322358368398427479560627
Percentage of InterestExpenseDeposits100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestIncomeExpenseAfterProvisionForLoanLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value6024248435444044098418245184275404438873867367334823695368935013529358136683408364135473504361136153466371137913685337736322324284126612793260622422374174911108321011513
Percentage of InterestIncomeExpenseAfterProvisionForLoanLoss100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:InterestIncomeExpenseNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value6025606657375746579158205786555157185813570054735474544752775093505649614760453745764656449743154350442345604553457045284646400134143283313631403109309732281954200519451792
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

us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value17511623-833-1415-39435132453146506647-3-615456-13-29-68-102
Percentage of InterestIncomeExpenseNet2.91.90.4-0.10.6-0.20.3-0.10.20.70.90.60.80.60.91.01.30.9-0.1-0.10.31.00.1-0.3-0.7-1.5-2.2

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, cof:CommercialBanking



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value491494486514489528539549536566560569566565555559537484454466461455439436421447424
Percentage of InterestIncomeExpenseNet8.18.18.58.98.49.19.39.99.49.79.810.410.310.410.511.010.69.89.510.310.19.89.810.19.710.19.3

us-gaap:OperatingSegments, cof:ConsumerBanking



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value165716621682170916791689163616091615163616491578151714981472143914201434144314441434145914251431143314681481
Percentage of InterestIncomeExpenseNet27.527.429.329.729.029.028.329.028.228.128.928.827.727.527.928.328.128.930.331.831.331.331.733.232.933.232.5

us-gaap:OperatingSegments, us-gaap:CreditCard



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value37023794354635313590361735963396355835683440
Percentage of InterestIncomeExpenseNet61.462.561.861.562.062.162.261.262.261.460.4

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

us-gaap:ForeignExchangeContract, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-31
Value7712131214131288676511-1-5000
Percentage of InterestIncomeExpenseNet0.10.10.20.20.20.20.20.20.10.10.10.10.10.10.00.0-0.0-0.10.00.00.0

us-gaap:InterestRateContract, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value26-5-44-62-60-42-36-196232539587277787986647875655448422123
Percentage of InterestIncomeExpenseNet0.4-0.1-0.8-1.1-1.0-0.7-0.6-0.30.10.40.40.71.11.31.51.51.61.71.31.71.61.41.21.11.00.50.5

us-gaap:FinancialInstrument, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:HeldtomaturitySecurities, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value0-9-10-8-8-9-10-10-24-37-40
Percentage of InterestIncomeExpenseNet0.0-0.1-0.2-0.1-0.1-0.2-0.2-0.2-0.4-0.6-0.7

us-gaap:InterestPaidNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-31
Value1157110112781163124810521085860936692
Percentage of InterestPaidNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:LaborAndRelatedExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value1627165216051558157313451432143015201521152413831471133613171279127012151189136012111179112811251161110311451104108010391002971891750715741641650646640648634554
Percentage of LaborAndRelatedExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:MarketingExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value491710501546517831504425414460379435396575393415428564418387375509392335325427299330317393316334321312329276250219180188104134162
Percentage of MarketingExpense100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:NoninterestExpense



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value3729416138723779367141323773342435733779356734143434367933613295322334803160330730493284298529792932323531473059302832553045314225042297225521621996200018471948180219221745
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

us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value11812311397891172831481311531615672104946348603918231583155216850
Percentage of NoninterestExpense3.23.02.92.62.42.87.54.33.74.04.51.62.12.82.81.91.51.71.25.51.01.81.01.80.72.11.6

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, cof:CommercialBanking



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value412441414427417434408409403437394381391393349343322342272270272293268267255281228
Percentage of NoninterestExpense11.010.610.711.311.410.510.811.911.311.611.011.211.410.710.410.410.09.88.68.28.98.99.09.08.78.77.2

us-gaap:OperatingSegments, cof:ConsumerBanking



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value991111098510029941085979963100010811051105910421109103410069901057100199897010459569389301018927
Percentage of NoninterestExpense26.626.725.426.527.126.325.928.128.028.629.531.030.330.130.830.530.730.431.730.231.831.832.031.531.731.529.5

us-gaap:OperatingSegments, us-gaap:CreditCard



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value22082487236022532171249621031904203921081961
Percentage of NoninterestExpense59.259.861.059.659.160.455.755.657.155.855.0

us-gaap:NoninterestIncome



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value1224136112221378129211931176164111911200128512311061111911841161116412331140113510711157114211531020112110911085981109611361054152187185794290780710611412155312321089
Percentage of NoninterestIncome100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:ConsolidationItems

us-gaap:CorporateNonSegment



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value-51-44-34-26-5-11-61373-27-1449-10-30-712-2870-29-17-1-535-2-38-14
Percentage of NoninterestIncome-4.2-3.2-2.8-1.9-0.4-0.9-5.222.7-2.3-1.23.8-0.8-2.8-6.30.2-0.20.70.60.0-2.6-1.6-0.1-0.43.0-0.2-3.4-1.3

us-gaap:ConsolidationItems, us-gaap:StatementBusinessSegments

us-gaap:OperatingSegments, cof:CommercialBanking



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value2382232212001871591892091871881791831581751561291181421081231141321221098713187
Percentage of NoninterestIncome19.416.418.114.514.513.316.112.715.715.713.914.914.915.613.211.110.111.59.510.810.611.410.79.58.511.78.0

us-gaap:OperatingSegments, cof:ConsumerBanking



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value126152165166160159155175174179192183195166201175191182174196158185179170150195184
Percentage of NoninterestIncome10.311.213.512.012.413.313.210.714.614.914.914.918.414.817.015.116.414.815.317.314.816.015.714.714.717.416.9

us-gaap:OperatingSegments, us-gaap:CreditCard



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value91110308701038950886893884857847865
Percentage of NoninterestIncome74.475.771.275.373.574.375.953.972.070.667.3

us-gaap:NoninterestIncomeOther



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value145226144191157118248528108140141141120-1194176172193167146153181157159111129966911541401201982608957-1723248224261-9
Percentage of NoninterestIncomeOther100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

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

us-gaap:ForeignExchangeContract, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedNetGainLossFromDesignatedOrQualifyingCashFlowHedges



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-30
Value392-11771-123-1721920-1750100300-12-4-12-7-11-7-10-8-8-13
Percentage of NoninterestIncomeOther270.3-51.849.3-64.4-109.6162.70.0-0.269.40.00.70.00.0-300.00.00.0-0.61.0-2.4-8.2-4.6-6.1-4.5-6.3-7.2-6.2-13.5

us-gaap:FinancialInstrument, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:StatementEquityComponents

us-gaap:AvailableforsaleSecurities, us-gaap:ReclassificationOutOfAccumulatedOtherComprehensiveIncome, us-gaap:AccumulatedNetUnrealizedInvestmentGainLoss



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-30
Value0-1851524-21-19608168
Percentage of NoninterestIncomeOther0.0-8.03.57.915.3-17.8-79.00.07.40.748.2

us-gaap:NumberOfOperatingSegments



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-31
Value3.00.00.00.03.00.00.00.03.00.03.03.03.00.00.00.03.0
Percentage of NumberOfOperatingSegments100.00.00.00.0100.00.00.00.0100.00.0100.0100.0100.00.00.00.0100.0

us-gaap:OccupancyNet



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-312010-09-302010-06-302010-03-312009-12-312009-09-302009-06-302009-03-31
Value517565519521493610515503490523471474471522499465458511444439435474419447405429369356350914145145123122118119135117119121114115100
Percentage of OccupancyNet100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentBeforeTaxPortionAttributableToParent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-30
Value1610-19132358384283-31-86-771-2761623746-77917212296-42298-25919088-104269229-761104-1735-254-94449171-10-112
Percentage of OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentBeforeTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-31
Value1224-14100272292214-23-65-585-1741014936-49910136187-26662-16612256-65169144-46689-1082-158-62280105-6-75172-50
Percentage of OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeAvailableforsaleSecuritiesTaxPortionAttributableToParent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-302011-06-302011-03-31
Value386-532869269-8-21-186-10268810-280776109-15636-936832-3910085-30415-653-96-32169664-379427
Percentage of OtherComprehensiveIncomeAvailableforsaleSecuritiesTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0100.0

us-gaap:OtherComprehensiveIncomeDerivativesQualifyingAsHedgesBeforeTaxPortionAttributableToParent



Period End2020-03-312019-12-312019-09-302019-06-302019-03-312018-12-312018-09-302018-06-302018-03-312017-12-312017-09-302017-06-302017-03-312016-12-312016-09-302016-06-302016-03-312015-12-312015-09-302015-06-302015-03-312014-12-312014-09-302014-06-302014-03-312013-12-312013-09-302013-06-302013-03-312012-12-312012-09-302012-06-302012-03-312011-09-30
Value1808-306249708365576-107-149-418-264-2972-104-916-226227600-319365-129258155-10711430-5584-258-21-689360123
Percentage of OtherComprehensiveIncomeDerivativesQualifyingAsHedgesBeforeTaxPortionAttributableToParent100.0100.0100.0100.0100.0100.0100.0100.0100.0