$COF
CAPITAL ONE FINANCIAL CORP Stock $cof

$cof Overview Financials Valuation SEC Filings Company Website

2024 Q1 Form 10-K Financial Statement

#000092762824000094 Filed on February 23, 2024

Income Statement

Concept	2024 Q1	2023 Q4	2023
Revenue	$9.402B		$36.79B
YoY Change	5.6%		7.41%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development	$351.0M		$1.383B
YoY Change	0.29%		0.29%
% of Gross Profit
Depreciation & Amortization	$806.0M	$798.0M	$3.226B
YoY Change	-35.57%	-5.34%	0.5%
% of Gross Profit
Operating Expenses	$351.0M		$1.383B
YoY Change	0.29%		0.29%
Operating Profit
YoY Change
Interest Expense	$3.689B		$12.70B
YoY Change	43.65%		207.96%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$1.582B	$932.0M	$6.045B
YoY Change	36.03%	-39.64%	-34.58%
Income Tax	$302.0M	$226.0M	$1.158B
% Of Pretax Income	19.09%	24.25%	19.16%
Net Earnings	$1.200B	$639.0M	$4.582B
YoY Change	35.29%	-44.96%	-34.95%
Net Earnings / Revenue	12.76%		12.46%
Basic Earnings Per Share	$3.14		$11.98
Diluted Earnings Per Share	$3.13	$1.67	$11.95
COMMON SHARES
Basic Shares Outstanding	380.2M shares	380.8M shares	382.4M shares
Diluted Shares Outstanding	383.4M shares		383.4M shares

Balance Sheet

Concept	2024 Q1	2023 Q4	2023
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$51.50B	$43.76B
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets
YoY Change
LONG-TERM ASSETS
Property, Plant & Equipment	$4.366B	$4.375B	$4.375B
YoY Change	0.02%	0.55%	0.55%
Goodwill	$15.06B	$15.07B
YoY Change	1.91%	1.95%
Intangibles	$290.0M	$310.0M
YoY Change	-20.98%	94.97%
Long-Term Investments
YoY Change
Other Assets
YoY Change
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$481.7B	$478.5B	$478.5B
YoY Change	2.13%	5.1%	5.1%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$762.0M	$649.0M	$649.0M
YoY Change	22.71%	23.15%	23.15%
Accrued Expenses			$1.312B
YoY Change			-10.01%
Deferred Revenue
YoY Change
Short-Term Debt	$568.0M	$538.0M	$538.0M
YoY Change	4.8%	-39.07%	-39.07%
Long-Term Debt Due			$7.111B
YoY Change			33.54%
Total Short-Term Liabilities	$1.330B	$1.187B	$1.187B
YoY Change	14.36%	125.24%	125.24%
LONG-TERM LIABILITIES
Long-Term Debt	$49.77B	$49.29B	$49.29B
YoY Change	3.23%	3.12%	3.12%
Other Long-Term Liabilities	$21.83B	$21.46B	$21.46B
YoY Change	22.75%	5.01%	5.01%
Total Long-Term Liabilities	$71.60B	$70.75B	$70.75B
YoY Change	8.49%	3.69%	3.69%
TOTAL LIABILITIES
Total Short-Term Liabilities	$1.330B	$1.187B	$1.187B
Total Long-Term Liabilities	$71.60B	$70.75B	$70.75B
Total Liabilities	$423.9B	$420.4B	$420.4B
YoY Change	1.66%	4.4%	4.4%
SHAREHOLDERS EQUITY
Retained Earnings	$61.91B	$60.95B
YoY Change	6.92%	6.58%
Common Stock	$7.000M	$7.000M
YoY Change	0.0%	0.0%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$57.80B	$58.09B	$58.09B
YoY Change
Total Liabilities & Shareholders Equity	$481.7B	$478.5B	$478.5B
YoY Change	2.13%	5.1%	5.1%

Cashflow Statement

Concept	2024 Q1	2023 Q4	2023
OPERATING ACTIVITIES
Net Income	$1.200B	$639.0M	$4.582B
YoY Change	35.29%	-44.96%	-34.95%
Depreciation, Depletion And Amortization	$806.0M	$798.0M	$3.226B
YoY Change	-35.57%	-5.34%	0.5%
Cash From Operating Activities	$3.010B	$7.100B	$20.58B
YoY Change	0.6%	-12.96%	49.0%
INVESTING ACTIVITIES
Capital Expenditures	$247.0M	$261.0M	$961.0M
YoY Change	5.11%	-10.0%	2.89%
Acquisitions	$0.00		$2.785B
YoY Change	-100.0%		136.82%
Other Investing Activities	$306.0M	-$9.429B	$1.325B
YoY Change	-0.97%	-15.49%	110.99%
Cash From Investing Activities	$1.675B	-$9.690B	-$21.92B
YoY Change	-155.95%	-15.35%	-26.29%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	$3.062B	1.041B	$13.84B
YoY Change	-80.52%	-88.75%	-44.91%
NET CHANGE
Cash From Operating Activities	$3.010B	7.100B	$20.58B
Cash From Investing Activities	$1.675B	-9.690B	-$21.92B
Cash From Financing Activities	$3.062B	1.041B	$13.84B
Net Change In Cash	$7.747B	-1.549B	$12.50B
YoY Change	-50.71%	-125.97%	35.83%
FREE CASH FLOW
Cash From Operating Activities	$3.010B	$7.100B	$20.58B
Capital Expenditures	$247.0M	$261.0M	$961.0M
Free Cash Flow	$2.763B	$6.839B	$19.61B
YoY Change	0.22%	-13.07%	52.34%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
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CY2021	cof	Service Chargesand Other Customer Related Fees ServiceChargesandOtherCustomerRelatedFees	1578000000	usd
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CY2022	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	5847000000	usd
CY2023	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	18815000000	usd
CY2021	us-gaap	Interest Income Expense After Provision For Loan Loss InterestIncomeExpenseAfterProvisionForLoanLoss	26115000000	usd
CY2023Q4	us-gaap	Derivative Asset Fair Value Gross Liability DerivativeAssetFairValueGrossLiability	433000000	usd
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CY2023	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
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CY2023	dei	Document Transition Report DocumentTransitionReport	false
CY2023	dei	Entity File Number EntityFileNumber	001-13300
CY2023	dei	Entity Registrant Name EntityRegistrantName	CAPITAL ONE FINANCIAL CORP
CY2023	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2023	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	54-1719854
CY2023	dei	Entity Address Address Line1 EntityAddressAddressLine1	1680 Capital One Drive,
CY2023	dei	Entity Address City Or Town EntityAddressCityOrTown	McLean,
CY2023	dei	Entity Address State Or Province EntityAddressStateOrProvince	VA
CY2023	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	22102
CY2023	dei	City Area Code CityAreaCode	703
CY2023	dei	Local Phone Number LocalPhoneNumber	720-1000
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CY2023	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
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CY2023	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2023	dei	Entity Small Business EntitySmallBusiness	false
CY2023	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
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CY2023	dei	Entity Shell Company EntityShellCompany	false
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CY2024Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	380212220	shares
CY2023	dei	Auditor Firm AuditorFirmId	42
CY2023	dei	Auditor Firm AuditorFirmId	42
CY2023	dei	Auditor Name AuditorName	Ernst & Young LLP
CY2023	dei	Auditor Location AuditorLocation	Tysons, Virginia
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CY2022	us-gaap	Dividends Common Stock DividendsCommonStock	950000000	usd
CY2022	us-gaap	Dividends Preferred Stock Cash DividendsPreferredStockCash	228000000	usd
CY2022	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	4948000000	usd
CY2022	cof	Stock Issued During Period Value New Issuesand Restricted Stock Netof Forfeitures StockIssuedDuringPeriodValueNewIssuesandRestrictedStockNetofForfeitures	276000000	usd
CY2022	cof	Stock Issued During Period Value Stock Options And Warrants Exercised And Restricted Stock Vesting StockIssuedDuringPeriodValueStockOptionsAndWarrantsExercisedAndRestrictedStockVesting	19000000	usd
CY2022	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	314000000	usd
CY2022Q4	us-gaap	Stockholders Equity StockholdersEquity	52582000000	usd
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CY2023	us-gaap	Dividends Common Stock DividendsCommonStock	931000000	usd
CY2023	us-gaap	Dividends Preferred Stock Cash DividendsPreferredStockCash	228000000	usd
CY2023	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	718000000	usd
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CY2023	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	503000000	usd
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CY2023Q4	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.60
CY2022Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.60
CY2023Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.60
CY2023Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.60
CY2023Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.60
CY2022Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.60
CY2022Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.60
CY2021Q4	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.60
CY2021Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	1.20
CY2021Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.40
CY2021Q2	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.40
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CY2022	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	7360000000	usd
CY2021	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	12394000000	usd
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CY2022	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	0	usd
CY2021	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	-4000000	usd
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CY2022	us-gaap	Net Income Loss NetIncomeLoss	7360000000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	12390000000	usd
CY2023	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	10426000000	usd
CY2022	us-gaap	Provision For Loan Losses Expensed ProvisionForLoanLossesExpensed	5847000000	usd
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CY2022	us-gaap	Depreciation And Amortization DepreciationAndAmortization	3210000000	usd
CY2021	us-gaap	Depreciation And Amortization DepreciationAndAmortization	3481000000	usd
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CY2022	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	-772000000	usd
CY2021	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	605000000	usd
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CY2022	us-gaap	Debt And Equity Securities Gain Loss DebtAndEquitySecuritiesGainLoss	-9000000	usd
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CY2021	us-gaap	Gain Loss On Sales Of Loans Net GainLossOnSalesOfLoansNet	-1000000	usd
CY2023	us-gaap	Share Based Compensation ShareBasedCompensation	513000000	usd
CY2022	us-gaap	Share Based Compensation ShareBasedCompensation	314000000	usd
CY2021	us-gaap	Share Based Compensation ShareBasedCompensation	331000000	usd
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CY2022	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-40000000	usd
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CY2021	us-gaap	Proceeds From Sale And Collection Of Loans Heldforsale ProceedsFromSaleAndCollectionOfLoansHeldforsale	9123000000	usd
CY2022	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	641000000	usd
CY2021	us-gaap	Increase Decrease In Accrued Interest Receivable Net IncreaseDecreaseInAccruedInterestReceivableNet	-17000000	usd
CY2023	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-716000000	usd
CY2022	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	2973000000	usd
CY2021	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	4114000000	usd
CY2023	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	122000000	usd
CY2022	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	246000000	usd
CY2021	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	-71000000	usd
CY2023	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	1846000000	usd
CY2022	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	511000000	usd
CY2021	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	1594000000	usd
CY2023	us-gaap	Cash Provided By Used In Operating Activities Discontinued Operations CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations	0	usd
CY2022	us-gaap	Cash Provided By Used In Operating Activities Discontinued Operations CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations	-3000000	usd
CY2021	us-gaap	Cash Provided By Used In Operating Activities Discontinued Operations CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations	-6000000	usd
CY2023	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	20575000000	usd
CY2022	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	13809000000	usd
CY2021	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	12310000000	usd
CY2023	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	10446000000	usd
CY2022	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	14850000000	usd
CY2021	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	27884000000	usd
CY2023	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	8841000000	usd
CY2021	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	2776000000	usd
CY2022	cof	Payments For Proceeds From Sale Of Financing Receivable Held For Investment PaymentsForProceedsFromSaleOfFinancingReceivableHeldForInvestment	35885000000	usd
CY2021	cof	Payments For Proceeds From Sale Of Financing Receivable Held For Investment PaymentsForProceedsFromSaleOfFinancingReceivableHeldForInvestment	33833000000	usd
CY2023	us-gaap	Proceeds From Recoveries Of Loan Previously Charged Off ProceedsFromRecoveriesOfLoanPreviouslyChargedOff	2288000000	usd
CY2022	us-gaap	Proceeds From Recoveries Of Loan Previously Charged Off ProceedsFromRecoveriesOfLoanPreviouslyChargedOff	2091000000	usd
CY2021	us-gaap	Proceeds From Recoveries Of Loan Previously Charged Off ProceedsFromRecoveriesOfLoanPreviouslyChargedOff	2506000000	usd
CY2023	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	961000000	usd
CY2022	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	934000000	usd
CY2021	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	698000000	usd
CY2023	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	2785000000	usd
CY2022	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	1176000000	usd
CY2021	us-gaap	Payments To Acquire Businesses Net Of Cash Acquired PaymentsToAcquireBusinessesNetOfCashAcquired	669000000	usd
CY2023	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	1325000000	usd
CY2022	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	628000000	usd
CY2021	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	668000000	usd
CY2023	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-21920000000	usd
CY2022	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-29738000000	usd
CY2021	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-31501000000	usd
CY2023	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	15172000000	usd
CY2022	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	22539000000	usd
CY2021	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	5687000000	usd
CY2023	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	3292000000	usd
CY2022	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	9728000000	usd
CY2021	us-gaap	Proceeds From Issuance Of Secured Debt ProceedsFromIssuanceOfSecuredDebt	6232000000	usd
CY2023	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	2483000000	usd
CY2022	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	7060000000	usd
CY2021	us-gaap	Repayments Of Secured Debt RepaymentsOfSecuredDebt	3442000000	usd
CY2023	cof	Proceedsfrom Issuanceof Unsecured Debtand Long Term Fhlb Advances Netof Issuance Cost ProceedsfromIssuanceofUnsecuredDebtandLongTermFHLBAdvancesNetofIssuanceCost	8218000000	usd
CY2022	cof	Proceedsfrom Issuanceof Unsecured Debtand Long Term Fhlb Advances Netof Issuance Cost ProceedsfromIssuanceofUnsecuredDebtandLongTermFHLBAdvancesNetofIssuanceCost	21272000000	usd
CY2021	cof	Proceedsfrom Issuanceof Unsecured Debtand Long Term Fhlb Advances Netof Issuance Cost ProceedsfromIssuanceofUnsecuredDebtandLongTermFHLBAdvancesNetofIssuanceCost	4486000000	usd
CY2023	cof	Repaymentsof Unsecured Debtand Long Term Fhlb Advances RepaymentsofUnsecuredDebtandLongTermFHLBAdvances	8436000000	usd
CY2022	cof	Repaymentsof Unsecured Debtand Long Term Fhlb Advances RepaymentsofUnsecuredDebtandLongTermFHLBAdvances	15561000000	usd
CY2021	cof	Repaymentsof Unsecured Debtand Long Term Fhlb Advances RepaymentsofUnsecuredDebtandLongTermFHLBAdvances	3851000000	usd
CY2023	us-gaap	Proceeds From Repayments Of Other Debt ProceedsFromRepaymentsOfOtherDebt	-351000000	usd
CY2022	us-gaap	Proceeds From Repayments Of Other Debt ProceedsFromRepaymentsOfOtherDebt	44000000	usd
CY2021	us-gaap	Proceeds From Repayments Of Other Debt ProceedsFromRepaymentsOfOtherDebt	129000000	usd
CY2023	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	299000000	usd
CY2022	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	276000000	usd
CY2021	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	253000000	usd
CY2023	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	931000000	usd
CY2022	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	950000000	usd
CY2021	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	1148000000	usd
CY2023	us-gaap	Proceeds From Issuance Of Preferred Stock And Preference Stock ProceedsFromIssuanceOfPreferredStockAndPreferenceStock	0	usd
CY2022	us-gaap	Proceeds From Issuance Of Preferred Stock And Preference Stock ProceedsFromIssuanceOfPreferredStockAndPreferenceStock	0	usd
CY2021	us-gaap	Proceeds From Issuance Of Preferred Stock And Preference Stock ProceedsFromIssuanceOfPreferredStockAndPreferenceStock	2052000000	usd
CY2023	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	228000000	usd
CY2022	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	228000000	usd
CY2021	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	274000000	usd
CY2023	cof	Payments For Redemption Of Preferred Stock PaymentsForRedemptionOfPreferredStock	0	usd
CY2022	cof	Payments For Redemption Of Preferred Stock PaymentsForRedemptionOfPreferredStock	0	usd
CY2021	cof	Payments For Redemption Of Preferred Stock PaymentsForRedemptionOfPreferredStock	2100000000	usd
CY2023	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	718000000	usd
CY2022	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	4948000000	usd
CY2021	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	7605000000	usd
CY2023	us-gaap	Proceeds From Stock Plans ProceedsFromStockPlans	10000000	usd
CY2022	us-gaap	Proceeds From Stock Plans ProceedsFromStockPlans	19000000	usd
CY2021	us-gaap	Proceeds From Stock Plans ProceedsFromStockPlans	55000000	usd
CY2023	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	13844000000	usd
CY2022	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	25131000000	usd
CY2021	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	474000000	usd
CY2023	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	12499000000	usd
CY2022	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	9202000000	usd
CY2021	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-18717000000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	31256000000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	22054000000	usd
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	40771000000	usd
CY2023Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	43755000000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	31256000000	usd
CY2021Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	22054000000	usd
CY2023	cof	Transfer Of To Portfolio Financing Receivables To From Held For Sale TransferOfToPortfolioFinancingReceivablesToFromHeldForSale	1195000000	usd
CY2022	cof	Transfer Of To Portfolio Financing Receivables To From Held For Sale TransferOfToPortfolioFinancingReceivablesToFromHeldForSale	697000000	usd
CY2021	cof	Transfer Of To Portfolio Financing Receivables To From Held For Sale TransferOfToPortfolioFinancingReceivablesToFromHeldForSale	4843000000	usd
CY2023	us-gaap	Interest Paid Net InterestPaidNet	10823000000	usd
CY2022	us-gaap	Interest Paid Net InterestPaidNet	3609000000	usd
CY2021	us-gaap	Interest Paid Net InterestPaidNet	2158000000	usd
CY2023	us-gaap	Income Taxes Paid IncomeTaxesPaid	1355000000	usd
CY2022	us-gaap	Income Taxes Paid IncomeTaxesPaid	1852000000	usd
CY2021	us-gaap	Income Taxes Paid IncomeTaxesPaid	2527000000	usd
CY2023	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	3	segment
CY2023	us-gaap	Use Of Estimates UseOfEstimates	The preparation of the consolidated financial statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and in the related disclosures. These estimates are based on information available as of the date of the consolidated financial statements. While management makes its best judgments, actual amounts or results could differ from these estimates.
CY2023Q4	us-gaap	Other Investments OtherInvestments	1000000000	usd
CY2022Q4	us-gaap	Other Investments OtherInvestments	901000000	usd
CY2023Q4	us-gaap	Equity Securities Without Readily Determinable Fair Value Amount EquitySecuritiesWithoutReadilyDeterminableFairValueAmount	669000000	usd
CY2022Q4	us-gaap	Equity Securities Without Readily Determinable Fair Value Amount EquitySecuritiesWithoutReadilyDeterminableFairValueAmount	583000000	usd
CY2023	us-gaap	Financing Receivable Allowance For Credit Losses Policy For Uncollectible Amounts FinancingReceivableAllowanceForCreditLossesPolicyForUncollectibleAmounts	<div style="margin-bottom:9pt;margin-top:9pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Allowance for Credit Losses - Available for Sale Investment Securities</span></div><div style="margin-bottom:9pt;margin-top:9pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">We maintain an allowance for credit losses that represents management’s current estimate of expected credit losses over the contractual terms of our investment securities classified as available for sale. When an investment security available for sale is impaired due to credit factors, we recognize that impairment through the provision for credit losses in our consolidated statements of income and correspondingly establish an allowance for credit losses on our consolidated balance sheets. Credit losses recognized in the allowance for credit losses are limited to the amount by which the investment security’s amortized cost basis exceeds its fair value. Investment securities in unrealized gain positions do not have any allowance for credit losses as the investment security could be sold at its fair value to prevent realization of any credit losses. We exclude accrued interest from the fair value and amortized cost basis of an investment security for purposes of measuring impairment. Charge-offs of uncollectible amounts of investment securities are deducted from the allowance for credit losses.</span></div><div style="margin-bottom:9pt;margin-top:9pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">For certain of our securities available for sale, we have determined that there is no risk of impairment due to credit factors. These investment securities include high quality debt instruments that are issued and guaranteed by the United States government and its agencies, certain government-sponsored enterprises, and certain foreign sovereign governments or </span></div><div style="margin-bottom:9pt;margin-top:9pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">supranational organizations. Management performs periodic assessments to reevaluate this conclusion by considering any changes in historical losses, current conditions, and reasonable and supportable forecasts.</span></div><div style="margin-bottom:9pt;margin-top:9pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">We evaluate impairment on a quarterly basis at the individual security level and determine whether any portion of the decline in fair value is due to a credit loss. We make this determination through the use of quantitative and qualitative analyses. Our qualitative analysis includes factors such as the extent to which fair value is less than amortized cost, any changes in the security’s credit rating, past defaults or delayed payments, and adverse conditions impacting the security or issuer. A credit loss exists to the extent that management does not expect to recover the amortized cost basis.</span></div><div style="margin-bottom:9pt;margin-top:9pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">For investment securities which require further assessment, we perform a quantitative analysis using a discounted cash flow methodology and compare the present value of expected future cash flows to the security’s amortized cost basis. Projected future cash flows reflect management’s best estimate and are based on our understanding of past events, current conditions, reasonable and supportable forecasts, and are discounted by the security’s effective interest rate adjusted for prepayments. The allowance for credit losses for investment securities reflects the difference by which the amortized cost basis exceeds the present value of future cash flows and is limited to the amount by which the security’s amortized cost exceeds its fair value. See “Note 2—Investment Securities” for additional information.</span></div><div style="margin-bottom:9pt;margin-top:9pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Allowance for Credit Losses - Loans Held for Investment</span></div><div style="margin-bottom:9pt;margin-top:9pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">We maintain an allowance for credit losses (“allowance”) that represents management’s current estimate of expected credit losses over the contractual terms of our loans held for investment. We measure the allowance on a quarterly basis through consideration of past events, including historical experience, current conditions and reasonable and supportable forecasts.</span></div><div style="margin-bottom:9pt;margin-top:9pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">We measure current expected credit losses (“CECL”) over the contractual terms of our loans. The contractual terms are adjusted for expected prepayments but are not extended for renewals or extensions, except when an extension or renewal arises from a borrower option that is not unconditionally cancellable.</span></div><div style="margin-bottom:9pt;margin-top:9pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">We aggregate loans sharing similar risk characteristics into pools for purposes of measuring expected credit losses. Pools are reassessed periodically to confirm that all loans within each pool continue to share similar risk characteristics. Expected credit losses for loans that do not share similar risk characteristics with other financial assets are measured individually.</span></div><div style="margin-bottom:9pt;margin-top:9pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Expected recoveries of amounts previously charged off or expected to be charged off are recognized within the allowance, with a corresponding reduction to our provision for credit losses. At times expected recoveries may result in a negative allowance. We limit the allowance recovery expectations to amounts previously charged off and expected to be charged off. Charge-offs of uncollectible amounts result in a reduction to the allowance and recoveries of previously charged off amounts result in an increase to the allowance.</span></div><div style="margin-bottom:9pt;margin-top:9pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">When developing an estimate of expected credit losses, we use both quantitative and qualitative methods in considering all available information relevant to assessing collectability. This may include internal information, external information, or a combination of both relating to past events, current conditions, and reasonable and supportable forecasts. Judgment is applied to the development and duration of reasonable and supportable forecasts used in our estimation of lifetime losses. We estimate expected credit losses over the duration of those forecasts and then revert, on a rational and systematic basis, to historical losses at each relevant loss component of the estimate. Expected losses for contractual terms extending beyond the reasonable and supportable forecast and reversion periods are based on those historical losses.</span></div><div style="margin-bottom:9pt;margin-top:9pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Management will consider and may qualitatively adjust for conditions, changes and trends in loan portfolios that may not be captured in modeled results. These adjustments are referred to as qualitative factors and represent management’s judgment of the imprecision and risks inherent in the processes and assumptions used in establishing the allowance for credit losses. Management’s judgment may involve an assessment of current and forward-looking conditions including but not limited to changes in lending policies and procedures, nature and volume of the portfolio, external factors, and uncertainty as it relates to economic, model or forecast risks, where not already captured in the modeled results.</span></div><div style="margin-bottom:9pt;margin-top:9pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Expected credit losses for collateral-dependent loans are based on the fair value of the underlying collateral. When we intend to liquidate the collateral, the fair value of the collateral is adjusted for expected costs to sell. A loan is deemed to be a collateral-dependent loan when (i) we determine foreclosure or repossession of the underlying collateral is probable, or (ii) foreclosure or repossession is not probable, but the borrower is experiencing financial difficulty and we expect repayment to be provided substantially through the operation or sale of the collateral. The allowance for a collateral-dependent loan reflects the difference between the loan’s amortized cost basis and the fair value (less selling costs, where applicable) of the loan’s underlying collateral.</span></div><div style="margin-bottom:9pt;margin-top:9pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Our credit card and consumer banking loan portfolios consist of smaller-balance, homogeneous loans. The consumer banking loan portfolio is divided into two primary portfolio segments: auto loans and retail banking loans. We assess our credit card and consumer banking loan portfolios based on common risk characteristics, such as origination year, contract type, interest rate, borrower credit score and geography. The commercial banking loan portfolio is primarily composed of larger-balance, non-homogeneous loans. These loans are subject to reviews that result in internal risk ratings. In assessing the risk rating of a particular commercial banking loan, among the factors we consider are the financial condition of the borrower, geography, collateral performance, historical loss experience and industry-specific information that management believes is relevant in determining and measuring expected credit losses. Subjective assessment and interpretation are involved. Emphasizing one factor over another or considering additional factors could impact the risk rating assigned to that commercial banking loan.</span></div><div style="margin-bottom:9pt;margin-top:9pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">For consumer banking and commercial banking loans, the contractual period typically does not include renewals or extensions because the renewals and extensions are generally not at the borrower’s exclusive option to exercise. The undrawn credit exposure associated with our credit card loans is unconditionally cancellable. For this reason, expected credit losses are measured based only on the drawn balance at each quarterly measurement date and not on the undrawn exposure. Because credit card loans do not have a defined contractual life, management estimates both the volume and application of payments to determine a contractual life of the drawn balance at the measurement date over which expected credit losses are developed for credit card loans.</span></div><div style="margin-bottom:9pt;margin-top:9pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">For consumer banking and commercial banking loans, we have made a policy election to not measure an allowance on accrued interest for loans held for investment because we reverse uncollectible accrued interest in a timely manner. See the “Delinquent and Nonperforming Loans” and “Charge-Offs - Loans” sections of this Note for information on what we consider timely. For credit card loans, we do not make this election, and we reserve for uncollectible accrued interest relating to credit card loans in the allowance.</span></div><div style="margin-bottom:9pt;margin-top:9pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The allowance related to credit card and consumer banking loans assessed on a pooled basis is based on a modeled calculation, which is supplemented by management judgment as described above. Because of the homogeneous nature of our consumer loan portfolios, the allowance is based on the aggregated portfolio segment evaluations. The allowance is established through a process that begins with estimates of historical losses in each pool based upon various statistical analyses, with adjustments for current conditions and reasonable and supportable forecasts of conditions, which includes expected economic conditions. Loss forecast models are utilized to estimate expected credit losses and consider several portfolio indicators including, but not limited to, expected economic conditions, historical loss experience, account seasoning, the value of collateral underlying secured loans, estimated foreclosures or defaults based on observable trends, delinquencies, bankruptcy filings, unemployment, borrower credit scores and general business trends. Management also considers an evaluation of overall portfolio credit quality based on indicators such as changes in our credit evaluation, underwriting and collection management policies, the effect of other external factors such as competition and legal and regulatory requirements, general economic conditions and business trends, and uncertainties in forecasting and modeling techniques used in estimating our allowance.</span></div><div style="margin-bottom:9pt;margin-top:9pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The allowance related to commercial banking loans assessed on a pooled basis is based on our historical loss experience for loans with similar risk characteristics and consideration of the current credit quality of the portfolio, which is supplemented by management judgment as described above. These are adjusted for current conditions, and reasonable and supportable forecasts of conditions likely to cause future losses which vary from historical levels. We apply internal risk ratings to commercial banking loans, which we use to assess credit quality and derive a total loss estimate based on an estimated probability of default (“default rate”) and loss given default (“loss severity”). Management may also apply judgment to adjust the loss factors derived, taking into consideration both quantitative and qualitative factors, including general economic conditions, industry-specific and geographic trends, portfolio concentrations, trends in internal credit quality indicators, and current and past underwriting standards that have occurred but are not yet reflected in the historical data underlying our loss estimates.</span></div><div style="margin-bottom:9pt;margin-top:9pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The allowance related to smaller-balance homogeneous credit card and consumer banking loans whose terms have been modified is calculated on a pool basis using historical loss experience, adjusted for current conditions and reasonable and supportable forecasts of conditions likely to cause future losses which vary from historical levels for the respective class of assets. The allowance related to consumer banking loans that are assessed at a loan-level is determined based on key considerations that include the borrower’s overall financial condition, resources and payment history, prospects for support from financially responsible guarantors, and when applicable, the estimated realizable value of any collateral. The allowance related to commercial banking loans that are assessed at a loan-level is generally determined in accordance with our policy for estimating expected credit losses for collateral-dependent loans as described above.</span></div><div style="margin-bottom:9pt;margin-top:9pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-style:italic;font-weight:700;line-height:120%">Off-balance sheet credit exposures</span></div><div style="margin-bottom:9pt;margin-top:9pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">In addition to the allowance, we also measure expected credit losses related to unfunded lending commitments that are not unconditionally cancellable in our Commercial Banking business. This reserve is measured using the same measurement objectives as the allowance for loans held for investment and is recorded within other liabilities on our consolidated balance sheets. These commitments are segregated by risk according to our internal risk rating scale, which we use to assess credit quality and derive an expected credit loss estimate. We assess these risk classifications, taking into consideration both quantitative and qualitative factors, including historical loss experience, adjusted for current conditions and reasonable and supportable forecasts of conditions likely to cause future losses which vary from historical levels, and utilization assumptions to estimate the reserve for unfunded lending commitments. Expected credit losses are not measured on unfunded lending commitments that are unconditionally cancellable, including all of our unfunded credit card and consumer banking lending commitments and certain of our unfunded commercial banking lending commitments.</span></div><div style="margin-bottom:9pt;margin-top:9pt;text-align:justify"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Determining the appropriateness of the allowance and the reserve for unfunded lending commitments is complex and requires judgment by management about the effect of matters that are inherently uncertain. Subsequent evaluations of the loan portfolio, in light of the factors then prevailing, may result in significant changes in the reserve for unfunded lending commitments in future periods. See “Note 4—Allowance for Credit Losses and Reserve for Unfunded Lending Commitments” for additional information.</span></div>
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CY2023	cof	Financing Receivable Allowance For Credit Loss Translation Adjustments And Purchase Credit Deteriorated Loans FinancingReceivableAllowanceForCreditLossTranslationAdjustmentsAndPurchaseCreditDeterioratedLoans	32000000	usd
CY2022	cof	Financing Receivable Allowance For Credit Loss Translation Adjustments And Purchase Credit Deteriorated Loans FinancingReceivableAllowanceForCreditLossTranslationAdjustmentsAndPurchaseCreditDeterioratedLoans	10000000	usd
CY2021	cof	Financing Receivable Allowance For Credit Loss Translation Adjustments And Purchase Credit Deteriorated Loans FinancingReceivableAllowanceForCreditLossTranslationAdjustmentsAndPurchaseCreditDeterioratedLoans	6000000	usd
CY2023	us-gaap	Financing Receivable Excluding Accrued Interest Year One Originated Current Fiscal Year Writeoff FinancingReceivableExcludingAccruedInterestYearOneOriginatedCurrentFiscalYearWriteoff	143000000	usd
CY2023	us-gaap	Financing Receivable Excluding Accrued Interest Year Two Originated Fiscal Year Before Current Fiscal Year Writeoff FinancingReceivableExcludingAccruedInterestYearTwoOriginatedFiscalYearBeforeCurrentFiscalYearWriteoff	822000000	usd
CY2023	us-gaap	Financing Receivable Excluding Accrued Interest Year Three Originated Two Years Before Current Fiscal Year Writeoff FinancingReceivableExcludingAccruedInterestYearThreeOriginatedTwoYearsBeforeCurrentFiscalYearWriteoff	772000000	usd
CY2023	us-gaap	Financing Receivable Excluding Accrued Interest Year Four Originated Three Years Before Current Fiscal Year Writeoff FinancingReceivableExcludingAccruedInterestYearFourOriginatedThreeYearsBeforeCurrentFiscalYearWriteoff	349000000	usd
CY2023	us-gaap	Financing Receivable Excluding Accrued Interest Year Five Originated Four Years Before Current Fiscal Year Writeoff FinancingReceivableExcludingAccruedInterestYearFiveOriginatedFourYearsBeforeCurrentFiscalYearWriteoff	398000000	usd
CY2023	us-gaap	Financing Receivable Excluding Accrued Interest Originated More Than Five Years Before Current Fiscal Year Writeoff FinancingReceivableExcludingAccruedInterestOriginatedMoreThanFiveYearsBeforeCurrentFiscalYearWriteoff	341000000	usd
CY2023	cof	Financing Receivable Excluding Accrued Interest Term Writeoff FinancingReceivableExcludingAccruedInterestTermWriteoff	2825000000	usd
CY2023	us-gaap	Financing Receivable Excluding Accrued Interest Revolving Writeoff FinancingReceivableExcludingAccruedInterestRevolvingWriteoff	7775000000	usd
CY2023	us-gaap	Financing Receivable Excluding Accrued Interest Revolving Converted To Term Loan Writeoff FinancingReceivableExcludingAccruedInterestRevolvingConvertedToTermLoanWriteoff	102000000	usd
CY2023	us-gaap	Financing Receivable Excluding Accrued Interest Allowance For Credit Loss Writeoff FinancingReceivableExcludingAccruedInterestAllowanceForCreditLossWriteoff	10702000000	usd
CY2023Q4	us-gaap	Variable Interest Entity Entity Maximum Loss Exposure Amount VariableInterestEntityEntityMaximumLossExposureAmount	6175000000	usd
CY2022Q4	us-gaap	Variable Interest Entity Entity Maximum Loss Exposure Amount VariableInterestEntityEntityMaximumLossExposureAmount	5281000000	usd
CY2023	us-gaap	Amortization Method Qualified Affordable Housing Project Investments Amortization AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization	682000000	usd
CY2022	us-gaap	Amortization Method Qualified Affordable Housing Project Investments Amortization AmortizationMethodQualifiedAffordableHousingProjectInvestmentsAmortization	637000000	usd
CY2023	us-gaap	Affordable Housing Tax Credits And Other Tax Benefits Amount AffordableHousingTaxCreditsAndOtherTaxBenefitsAmount	721000000	usd
CY2022	us-gaap	Affordable Housing Tax Credits And Other Tax Benefits Amount AffordableHousingTaxCreditsAndOtherTaxBenefitsAmount	664000000	usd
CY2023Q4	us-gaap	Amortization Method Qualified Affordable Housing Project Investments AmortizationMethodQualifiedAffordableHousingProjectInvestments	5500000000	usd
CY2022Q4	us-gaap	Amortization Method Qualified Affordable Housing Project Investments AmortizationMethodQualifiedAffordableHousingProjectInvestments	4900000000	usd
CY2023Q4	us-gaap	Qualified Affordable Housing Project Investments Commitment QualifiedAffordableHousingProjectInvestmentsCommitment	2300000000	usd
CY2022Q4	us-gaap	Qualified Affordable Housing Project Investments Commitment QualifiedAffordableHousingProjectInvestmentsCommitment	1800000000	usd
CY2023Q4	us-gaap	Goodwill Gross GoodwillGross	15065000000	usd
CY2023Q4	us-gaap	Goodwill Goodwill	15065000000	usd
CY2023Q4	us-gaap	Intangible Assets Gross Excluding Goodwill IntangibleAssetsGrossExcludingGoodwill	540000000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	230000000	usd
CY2023Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	310000000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Remaining Amortization Period1 FiniteLivedIntangibleAssetsRemainingAmortizationPeriod1	P6Y10M24D
CY2023Q4	cof	Intangible Assets Gross Including Goodwill IntangibleAssetsGrossIncludingGoodwill	15605000000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	230000000	usd
CY2023Q4	us-gaap	Intangible Assets Net Including Goodwill IntangibleAssetsNetIncludingGoodwill	15375000000	usd
CY2023Q4	cof	Mortgage Servicing Assetat Amortized Cost Gross MortgageServicingAssetatAmortizedCostGross	653000000	usd
CY2023Q4	cof	Servicing Assetat Amortized Cost Accumulated Amortization ServicingAssetatAmortizedCostAccumulatedAmortization	263000000	usd
CY2023Q4	us-gaap	Servicing Asset At Amortized Value ServicingAssetAtAmortizedValue	390000000	usd
CY2022Q4	us-gaap	Goodwill Gross GoodwillGross	14777000000	usd
CY2022Q4	us-gaap	Goodwill Goodwill	14777000000	usd
CY2022Q4	us-gaap	Intangible Assets Gross Excluding Goodwill IntangibleAssetsGrossExcludingGoodwill	342000000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	183000000	usd
CY2022Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	159000000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Remaining Amortization Period1 FiniteLivedIntangibleAssetsRemainingAmortizationPeriod1	P7Y3M18D
CY2022Q4	cof	Intangible Assets Gross Including Goodwill IntangibleAssetsGrossIncludingGoodwill	15119000000	usd
CY2022Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	183000000	usd
CY2022Q4	us-gaap	Intangible Assets Net Including Goodwill IntangibleAssetsNetIncludingGoodwill	14936000000	usd
CY2022Q4	cof	Mortgage Servicing Assetat Amortized Cost Gross MortgageServicingAssetatAmortizedCostGross	660000000	usd
CY2022Q4	cof	Servicing Assetat Amortized Cost Accumulated Amortization ServicingAssetatAmortizedCostAccumulatedAmortization	223000000	usd
CY2022Q4	us-gaap	Servicing Asset At Amortized Value ServicingAssetAtAmortizedValue	437000000	usd
CY2023	us-gaap	Servicing Asset At Amortized Value Amortization1 ServicingAssetAtAmortizedValueAmortization1	88000000	usd
CY2022	us-gaap	Servicing Asset At Amortized Value Amortization1 ServicingAssetAtAmortizedValueAmortization1	93000000	usd
CY2023	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	usd
CY2021	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	usd
CY2022	us-gaap	Goodwill Impairment Loss GoodwillImpairmentLoss	0	usd
CY2020Q4	us-gaap	Goodwill Goodwill	14653000000	usd
CY2021	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	130000000	usd
CY2021	us-gaap	Goodwill Other Increase Decrease GoodwillOtherIncreaseDecrease	-1000000	usd
CY2021Q4	us-gaap	Goodwill Goodwill	14782000000	usd
CY2022	us-gaap	Goodwill Other Increase Decrease GoodwillOtherIncreaseDecrease	-5000000	usd
CY2022Q4	us-gaap	Goodwill Goodwill	14777000000	usd
CY2023	us-gaap	Goodwill Acquired During Period GoodwillAcquiredDuringPeriod	273000000	usd
CY2023	us-gaap	Goodwill Other Increase Decrease GoodwillOtherIncreaseDecrease	15000000	usd
CY2023Q4	us-gaap	Goodwill Goodwill	15065000000	usd
CY2021	us-gaap	Impairment Of Intangible Assets Finitelived ImpairmentOfIntangibleAssetsFinitelived	0	usd
CY2023	us-gaap	Impairment Of Intangible Assets Finitelived ImpairmentOfIntangibleAssetsFinitelived	0	usd
CY2022	us-gaap	Impairment Of Intangible Assets Finitelived ImpairmentOfIntangibleAssetsFinitelived	10000000	usd
CY2021	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	29000000	usd
CY2022	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	60000000	usd
CY2023	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	82000000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Next Rolling Twelve Months FiniteLivedIntangibleAssetsAmortizationExpenseNextRollingTwelveMonths	77000000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Rolling Year Two FiniteLivedIntangibleAssetsAmortizationExpenseRollingYearTwo	65000000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Rolling Year Three FiniteLivedIntangibleAssetsAmortizationExpenseRollingYearThree	52000000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Rolling Year Four FiniteLivedIntangibleAssetsAmortizationExpenseRollingYearFour	41000000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Rolling Year Five FiniteLivedIntangibleAssetsAmortizationExpenseRollingYearFive	31000000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Amortization Expense Rolling After Year Five FiniteLivedIntangibleAssetsAmortizationExpenseRollingAfterYearFive	36000000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	302000000	usd
CY2023Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	9556000000	usd
CY2022Q4	us-gaap	Property Plant And Equipment Gross PropertyPlantAndEquipmentGross	9355000000	usd
CY2023Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	5181000000	usd
CY2022Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	5004000000	usd
CY2023Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	4375000000	usd
CY2022Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	4351000000	usd
CY2023	us-gaap	Depreciation Nonproduction DepreciationNonproduction	939000000	usd
CY2022	us-gaap	Depreciation Nonproduction DepreciationNonproduction	790000000	usd
CY2021	us-gaap	Depreciation Nonproduction DepreciationNonproduction	775000000	usd
CY2023Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	1009000000	usd
CY2022Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	1128000000	usd
CY2023Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	1312000000	usd
CY2022Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	1458000000	usd
CY2023Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P8Y2M12D
CY2022Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P8Y4M24D
CY2023Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.032
CY2022Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.031
CY2023	us-gaap	Operating Lease Cost OperatingLeaseCost	241000000	usd
CY2022	us-gaap	Operating Lease Cost OperatingLeaseCost	280000000	usd
CY2023	us-gaap	Variable Lease Cost VariableLeaseCost	47000000	usd
CY2022	us-gaap	Variable Lease Cost VariableLeaseCost	42000000	usd
CY2023	cof	Lease Cost Prior To Sublease Income LeaseCostPriorToSubleaseIncome	288000000	usd
CY2022	cof	Lease Cost Prior To Sublease Income LeaseCostPriorToSubleaseIncome	322000000	usd
CY2023	us-gaap	Sublease Income SubleaseIncome	18000000	usd
CY2022	us-gaap	Sublease Income SubleaseIncome	16000000	usd
CY2023	us-gaap	Lease Cost LeaseCost	270000000	usd
CY2022	us-gaap	Lease Cost LeaseCost	306000000	usd
CY2023	us-gaap	Operating Lease Payments OperatingLeasePayments	285000000	usd
CY2022	us-gaap	Operating Lease Payments OperatingLeasePayments	320000000	usd
CY2023	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	83000000	usd
CY2022	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	221000000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	241000000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	212000000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	194000000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	170000000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	151000000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	541000000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	1509000000	usd
CY2023Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	197000000	usd
CY2023Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	1312000000	usd
CY2023Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	15000000	usd
CY2023Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	27000000	usd
CY2023Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P4Y1M6D
CY2022Q4	us-gaap	Finance Lease Right Of Use Asset FinanceLeaseRightOfUseAsset	22000000	usd
CY2022Q4	us-gaap	Finance Lease Liability FinanceLeaseLiability	33000000	usd
CY2022Q4	us-gaap	Finance Lease Weighted Average Remaining Lease Term1 FinanceLeaseWeightedAverageRemainingLeaseTerm1	P3Y3M18D
CY2023	cof	Finance Lease Cost FinanceLeaseCost	16000000	usd
CY2022	cof	Finance Lease Cost FinanceLeaseCost	14000000	usd
CY2023Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	28024000000	usd
CY2022Q4	us-gaap	Noninterest Bearing Deposit Liabilities NoninterestBearingDepositLiabilities	32203000000	usd
CY2023Q4	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	320389000000	usd
CY2022Q4	us-gaap	Interest Bearing Deposit Liabilities InterestBearingDepositLiabilities	300789000000	usd
CY2023Q4	us-gaap	Deposits Deposits	348413000000	usd
CY2022Q4	us-gaap	Deposits Deposits	332992000000	usd
CY2023Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	538000000	usd
CY2022Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	883000000	usd
CY2023Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	49318000000	usd
CY2022Q4	us-gaap	Long Term Debt And Capital Lease Obligations LongTermDebtAndCapitalLeaseObligations	47832000000	usd
CY2023Q4	us-gaap	Debt And Capital Lease Obligations DebtAndCapitalLeaseObligations	49856000000	usd
CY2022Q4	us-gaap	Debt And Capital Lease Obligations DebtAndCapitalLeaseObligations	48715000000	usd
CY2023Q4	us-gaap	Time Deposits At Or Above Fdic Insurance Limit TimeDepositsAtOrAboveFDICInsuranceLimit	15800000000	usd
CY2023Q4	us-gaap	Deposit Liability Uninsured DepositLiabilityUninsured	9000000000	usd
CY2022Q4	us-gaap	Time Deposits At Or Above Fdic Insurance Limit TimeDepositsAtOrAboveFDICInsuranceLimit	6100000000	usd
CY2022Q4	us-gaap	Deposit Liability Uninsured DepositLiabilityUninsured	2000000000	usd
CY2023Q4	cof	Time Deposit Maturities With Contractual Maturity Dates Next Twelve Months TimeDepositMaturitiesWithContractualMaturityDatesNextTwelveMonths	60838000000	usd
CY2023Q4	cof	Time Deposit Maturities With Contractual Maturity Dates Year Two TimeDepositMaturitiesWithContractualMaturityDatesYearTwo	10971000000	usd
CY2023Q4	cof	Time Deposit Maturities With Contractual Maturity Dates Year Three TimeDepositMaturitiesWithContractualMaturityDatesYearThree	3232000000	usd
CY2023Q4	cof	Time Deposit Maturities With Contractual Maturity Dates Year Four TimeDepositMaturitiesWithContractualMaturityDatesYearFour	5932000000	usd
CY2023Q4	cof	Time Deposit Maturities With Contractual Maturity Dates Year Five TimeDepositMaturitiesWithContractualMaturityDatesYearFive	1747000000	usd
CY2023Q4	cof	Time Deposit Maturities With Contractual Maturity Dates After Year Five TimeDepositMaturitiesWithContractualMaturityDatesAfterYearFive	294000000	usd
CY2023Q4	cof	Time Deposits With Contractual Maturity Dates TimeDepositsWithContractualMaturityDates	83014000000	usd
CY2023Q4	cof	Time Deposits Maturities With Contractual Maturity Dates Debt Longtermand Shortterm Combined Amount Maturities Next Twelve Months TimeDepositsMaturitiesWithContractualMaturityDatesDebtLongtermandShorttermCombinedAmountMaturitiesNextTwelveMonths	68496000000	usd
CY2023Q4	cof	Time Deposits Maturities With Contractual Maturity Datesand Long Term Debt Maturities Year Two TimeDepositsMaturitiesWithContractualMaturityDatesandLongTermDebtMaturitiesYearTwo	21976000000	usd
CY2023Q4	cof	Time Deposits Maturities With Contractual Maturity Datesand Long Term Debt Maturities Year Three TimeDepositsMaturitiesWithContractualMaturityDatesandLongTermDebtMaturitiesYearThree	11251000000	usd
CY2023Q4	cof	Time Deposits Maturities With Contractual Maturity Datesand Long Term Debt Maturities Year Four TimeDepositsMaturitiesWithContractualMaturityDatesandLongTermDebtMaturitiesYearFour	11754000000	usd
CY2023Q4	cof	Time Deposits Maturities With Contractual Maturity Datesand Long Term Debt Maturities Year Five TimeDepositsMaturitiesWithContractualMaturityDatesandLongTermDebtMaturitiesYearFive	6823000000	usd
CY2023Q4	cof	Time Deposits Maturities With Contractual Maturity Datesand Long Term Debt Maturities After Year Five TimeDepositsMaturitiesWithContractualMaturityDatesandLongTermDebtMaturitiesAfterYearFive	12570000000	usd
CY2023Q4	cof	Time Deposits Maturities With Contractual Maturity Datesand Debt Longtermand Shortterm Combined Amount TimeDepositsMaturitiesWithContractualMaturityDatesandDebtLongtermandShorttermCombinedAmount	132870000000	usd
CY2023Q4	us-gaap	Derivative Notional Amount DerivativeNotionalAmount	294039000000	usd
CY2023Q4	us-gaap	Derivative Asset Fair Value Gross Asset Including Not Subject To Master Netting Arrangement DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement	2675000000	usd
CY2023Q4	us-gaap	Derivative Liability Fair Value Gross Liability Including Not Subject To Master Netting Arrangement DerivativeLiabilityFairValueGrossLiabilityIncludingNotSubjectToMasterNettingArrangement	2932000000	usd
CY2022Q4	us-gaap	Derivative Notional Amount DerivativeNotionalAmount	227801000000	usd
CY2022Q4	us-gaap	Derivative Asset Fair Value Gross Asset Including Not Subject To Master Netting Arrangement DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement	3098000000	usd
CY2022Q4	us-gaap	Derivative Liability Fair Value Gross Liability Including Not Subject To Master Netting Arrangement DerivativeLiabilityFairValueGrossLiabilityIncludingNotSubjectToMasterNettingArrangement	4550000000	usd
CY2023Q4	us-gaap	Derivative Asset Fair Value Gross Liability And Obligation To Return Cash Offset DerivativeAssetFairValueGrossLiabilityAndObligationToReturnCashOffset	1005000000	usd
CY2023Q4	us-gaap	Derivative Liability Fair Value Gross Asset And Right To Reclaim Cash Offset DerivativeLiabilityFairValueGrossAssetAndRightToReclaimCashOffset	597000000	usd
CY2022Q4	us-gaap	Derivative Asset Fair Value Gross Liability And Obligation To Return Cash Offset DerivativeAssetFairValueGrossLiabilityAndObligationToReturnCashOffset	1134000000	usd
CY2022Q4	us-gaap	Derivative Liability Fair Value Gross Asset And Right To Reclaim Cash Offset DerivativeLiabilityFairValueGrossAssetAndRightToReclaimCashOffset	1235000000	usd
CY2023Q4	us-gaap	Derivative Assets DerivativeAssets	1670000000	usd
CY2023Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	2335000000	usd
CY2022Q4	us-gaap	Derivative Assets DerivativeAssets	1964000000	usd
CY2022Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	3315000000	usd
CY2023Q4	cof	Derivative Credit Risk Valuation Adjustment Derivative Assets Liabilities DerivativeCreditRiskValuationAdjustmentDerivativeAssetsLiabilities	2000000	usd
CY2022Q4	cof	Derivative Credit Risk Valuation Adjustment Derivative Assets Liabilities DerivativeCreditRiskValuationAdjustmentDerivativeAssetsLiabilities	4000000	usd
CY2023Q4	us-gaap	Hedged Asset Discontinued Fair Value Hedge Cumulative Increase Decrease HedgedAssetDiscontinuedFairValueHedgeCumulativeIncreaseDecrease	2200000000	usd
CY2022Q4	us-gaap	Hedged Asset Discontinued Fair Value Hedge Cumulative Increase Decrease HedgedAssetDiscontinuedFairValueHedgeCumulativeIncreaseDecrease	236000000	usd
CY2023Q4	us-gaap	Prepayable Financial Asset Closed Portfolio Last Of Layer Amortized Cost PrepayableFinancialAssetClosedPortfolioLastOfLayerAmortizedCost	1500000000	usd
CY2022Q4	us-gaap	Prepayable Financial Asset Closed Portfolio Last Of Layer Amortized Cost PrepayableFinancialAssetClosedPortfolioLastOfLayerAmortizedCost	225000000	usd
CY2023Q4	us-gaap	Hedged Asset Fair Value Hedge Cumulative Increase Decrease HedgedAssetFairValueHedgeCumulativeIncreaseDecrease	33000000	usd
CY2022Q4	us-gaap	Hedged Asset Fair Value Hedge Cumulative Increase Decrease HedgedAssetFairValueHedgeCumulativeIncreaseDecrease	-13000000	usd
CY2023Q4	us-gaap	Derivative Asset Fair Value Gross Asset Including Not Subject To Master Netting Arrangement DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement	2675000000	usd
CY2022Q4	us-gaap	Derivative Asset Fair Value Gross Asset Including Not Subject To Master Netting Arrangement DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement	3098000000	usd
CY2022Q4	us-gaap	Derivative Asset Fair Value Gross Liability DerivativeAssetFairValueGrossLiability	759000000	usd
CY2022Q4	us-gaap	Derivative Asset Collateral Obligation To Return Cash Offset DerivativeAssetCollateralObligationToReturnCashOffset	375000000	usd
CY2022Q4	us-gaap	Derivative Assets DerivativeAssets	1964000000	usd
CY2022Q4	us-gaap	Derivative Asset Fair Value Of Collateral DerivativeAssetFairValueOfCollateral	96000000	usd
CY2022Q4	us-gaap	Derivative Fair Value Of Derivative Asset Amount Offset Against Collateral DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral	1868000000	usd
CY2023Q4	us-gaap	Derivative Liability Fair Value Gross Liability Including Not Subject To Master Netting Arrangement DerivativeLiabilityFairValueGrossLiabilityIncludingNotSubjectToMasterNettingArrangement	2932000000	usd
CY2023Q4	us-gaap	Derivative Liability Fair Value Gross Asset DerivativeLiabilityFairValueGrossAsset	433000000	usd
CY2023Q4	us-gaap	Derivative Liability Collateral Right To Reclaim Cash Offset DerivativeLiabilityCollateralRightToReclaimCashOffset	164000000	usd
CY2023Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	2335000000	usd
CY2023Q4	us-gaap	Derivative Liability Fair Value Of Collateral DerivativeLiabilityFairValueOfCollateral	13000000	usd
CY2023Q4	us-gaap	Derivative Fair Value Of Derivative Liability Amount Offset Against Collateral DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral	2322000000	usd
CY2023Q4	us-gaap	Securities Sold Under Agreements To Repurchase Gross SecuritiesSoldUnderAgreementsToRepurchaseGross	538000000	usd
CY2023Q4	us-gaap	Securities Sold Under Agreements To Repurchase Asset SecuritiesSoldUnderAgreementsToRepurchaseAsset	0	usd
CY2023Q4	cof	Repurchase Agreement Collateral Right To Reclaim Cash Offset RepurchaseAgreementCollateralRightToReclaimCashOffset	0	usd
CY2023Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	538000000	usd
CY2023Q4	us-gaap	Securities Sold Under Agreements To Repurchase Collateral Right To Reclaim Securities SecuritiesSoldUnderAgreementsToRepurchaseCollateralRightToReclaimSecurities	538000000	usd
CY2023Q4	us-gaap	Securities Sold Under Agreements To Repurchase Amount Offset Against Collateral SecuritiesSoldUnderAgreementsToRepurchaseAmountOffsetAgainstCollateral	0	usd
CY2022Q4	us-gaap	Derivative Liability Fair Value Gross Liability Including Not Subject To Master Netting Arrangement DerivativeLiabilityFairValueGrossLiabilityIncludingNotSubjectToMasterNettingArrangement	4550000000	usd
CY2022Q4	us-gaap	Derivative Liability Fair Value Gross Asset DerivativeLiabilityFairValueGrossAsset	759000000	usd
CY2022Q4	us-gaap	Derivative Liability Collateral Right To Reclaim Cash Offset DerivativeLiabilityCollateralRightToReclaimCashOffset	476000000	usd
CY2022Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	3315000000	usd
CY2022Q4	us-gaap	Derivative Liability Fair Value Of Collateral DerivativeLiabilityFairValueOfCollateral	85000000	usd
CY2022Q4	us-gaap	Derivative Fair Value Of Derivative Liability Amount Offset Against Collateral DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral	3230000000	usd
CY2022Q4	us-gaap	Securities Sold Under Agreements To Repurchase Gross SecuritiesSoldUnderAgreementsToRepurchaseGross	883000000	usd
CY2022Q4	us-gaap	Securities Sold Under Agreements To Repurchase Asset SecuritiesSoldUnderAgreementsToRepurchaseAsset	0	usd
CY2022Q4	cof	Repurchase Agreement Collateral Right To Reclaim Cash Offset RepurchaseAgreementCollateralRightToReclaimCashOffset	0	usd
CY2022Q4	us-gaap	Securities Sold Under Agreements To Repurchase SecuritiesSoldUnderAgreementsToRepurchase	883000000	usd
CY2022Q4	us-gaap	Securities Sold Under Agreements To Repurchase Collateral Right To Reclaim Securities SecuritiesSoldUnderAgreementsToRepurchaseCollateralRightToReclaimSecurities	883000000	usd
CY2022Q4	us-gaap	Securities Sold Under Agreements To Repurchase Amount Offset Against Collateral SecuritiesSoldUnderAgreementsToRepurchaseAmountOffsetAgainstCollateral	0	usd
CY2023Q4	us-gaap	Derivative Collateral Obligation To Return Cash DerivativeCollateralObligationToReturnCash	858000000	usd
CY2022Q4	us-gaap	Derivative Collateral Obligation To Return Cash DerivativeCollateralObligationToReturnCash	608000000	usd
CY2023Q4	us-gaap	Derivative Collateral Obligation To Return Securities DerivativeCollateralObligationToReturnSecurities	16000000	usd
CY2022Q4	us-gaap	Derivative Collateral Obligation To Return Securities DerivativeCollateralObligationToReturnSecurities	82000000	usd
CY2023Q4	us-gaap	Derivative Collateral Right To Reclaim Cash DerivativeCollateralRightToReclaimCash	1700000000	usd
CY2022Q4	us-gaap	Derivative Collateral Right To Reclaim Cash DerivativeCollateralRightToReclaimCash	2300000000	usd
CY2023Q4	us-gaap	Securities Sold Under Agreements To Repurchase Fair Value Of Collateral SecuritiesSoldUnderAgreementsToRepurchaseFairValueOfCollateral	549000000	usd
CY2022Q4	us-gaap	Securities Sold Under Agreements To Repurchase Fair Value Of Collateral SecuritiesSoldUnderAgreementsToRepurchaseFairValueOfCollateral	900000000	usd
CY2023	us-gaap	Interest And Dividend Income Securities InterestAndDividendIncomeSecurities	2550000000	usd
CY2023	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	37410000000	usd
CY2023	us-gaap	Other Interest And Dividend Income OtherInterestAndDividendIncome	1978000000	usd
CY2023	us-gaap	Interest Expense Deposits InterestExpenseDeposits	9489000000	usd
CY2023	cof	Interest Expense Secured Debt InterestExpenseSecuredDebt	959000000	usd
CY2023	cof	Interest Expense Unsecured Debt InterestExpenseUnsecuredDebt	2204000000	usd
CY2023	us-gaap	Noninterest Income Other NoninterestIncomeOther	1120000000	usd
CY2022	us-gaap	Interest And Dividend Income Securities InterestAndDividendIncomeSecurities	1884000000	usd
CY2022	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	28910000000	usd
CY2022	us-gaap	Other Interest And Dividend Income OtherInterestAndDividendIncome	443000000	usd
CY2022	us-gaap	Interest Expense Deposits InterestExpenseDeposits	2535000000	usd
CY2022	cof	Interest Expense Secured Debt InterestExpenseSecuredDebt	384000000	usd
CY2022	cof	Interest Expense Unsecured Debt InterestExpenseUnsecuredDebt	1074000000	usd
CY2022	us-gaap	Noninterest Income Other NoninterestIncomeOther	914000000	usd
CY2021	us-gaap	Interest And Dividend Income Securities InterestAndDividendIncomeSecurities	1446000000	usd
CY2021	us-gaap	Interest And Fee Income Loans And Leases InterestAndFeeIncomeLoansAndLeases	24263000000	usd
CY2021	us-gaap	Other Interest And Dividend Income OtherInterestAndDividendIncome	60000000	usd
CY2021	us-gaap	Interest Expense Deposits InterestExpenseDeposits	956000000	usd
CY2021	cof	Interest Expense Secured Debt InterestExpenseSecuredDebt	119000000	usd
CY2021	cof	Interest Expense Unsecured Debt InterestExpenseUnsecuredDebt	488000000	usd
CY2021	us-gaap	Noninterest Income Other NoninterestIncomeOther	824000000	usd
CY2023	cof	Amortization Of Basis Adjustment On Discontinued Hedges AmortizationOfBasisAdjustmentOnDiscontinuedHedges	-79000000	usd
CY2022	cof	Amortization Of Basis Adjustment On Discontinued Hedges AmortizationOfBasisAdjustmentOnDiscontinuedHedges	-78000000	usd
CY2021	cof	Amortization Of Basis Adjustment On Discontinued Hedges AmortizationOfBasisAdjustmentOnDiscontinuedHedges	-39000000	usd
CY2023	us-gaap	Cash Flow Hedge Gain Loss To Be Reclassified Within Twelve Months CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths	712000000	usd
CY2023	us-gaap	Maximum Length Of Time Hedged In Cash Flow Hedge1 MaximumLengthOfTimeHedgedInCashFlowHedge1	P9Y2M12D
CY2023Q4	us-gaap	Preferred Stock Including Additional Paid In Capital Net Of Discount PreferredStockIncludingAdditionalPaidInCapitalNetOfDiscount	4845000000	usd
CY2022Q4	us-gaap	Preferred Stock Including Additional Paid In Capital Net Of Discount PreferredStockIncludingAdditionalPaidInCapitalNetOfDiscount	4845000000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	-2266000000	usd
CY2021	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	854000000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-3120000000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	-10400000000	usd
CY2022	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-110000000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-10290000000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	666000000	usd
CY2023	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	-982000000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	1648000000	usd
CY2023	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Before Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentBeforeTaxPortionAttributableToParent	1183000000	usd
CY2023	us-gaap	Other Comprehensive Income Availableforsale Securities Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesTaxPortionAttributableToParent	276000000	usd
CY2023	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	907000000	usd
CY2022	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Before Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentBeforeTaxPortionAttributableToParent	-10516000000	usd
CY2022	us-gaap	Other Comprehensive Income Availableforsale Securities Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesTaxPortionAttributableToParent	-2543000000	usd
CY2022	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	-7973000000	usd
CY2021	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Before Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentBeforeTaxPortionAttributableToParent	-2486000000	usd
CY2021	us-gaap	Other Comprehensive Income Availableforsale Securities Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesTaxPortionAttributableToParent	-597000000	usd
CY2021	us-gaap	Other Comprehensive Income Availableforsale Securities Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeAvailableforsaleSecuritiesAdjustmentNetOfTaxPortionAttributableToParent	-1889000000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax	906000000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax	217000000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	689000000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax	-3032000000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax	-732000000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	-2300000000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax	-1640000000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax	-396000000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	-1244000000	usd
CY2023	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Before Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentBeforeTaxPortionAttributableToParent	6000000	usd
CY2023	us-gaap	Other Comprehensive Income Foreign Currency Translation Adjustment Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTranslationAdjustmentTaxPortionAttributableToParent	-40000000	usd
CY2023	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	46000000	usd
CY2022	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Before Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentBeforeTaxPortionAttributableToParent	98000000	usd
CY2022	us-gaap	Other Comprehensive Income Foreign Currency Translation Adjustment Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTranslationAdjustmentTaxPortionAttributableToParent	97000000	usd
CY2022	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	1000000	usd
CY2021	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Before Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentBeforeTaxPortionAttributableToParent	17000000	usd
CY2021	us-gaap	Other Comprehensive Income Foreign Currency Translation Adjustment Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTranslationAdjustmentTaxPortionAttributableToParent	7000000	usd
CY2021	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	10000000	usd
CY2023	cof	Other Comprehensive Income Loss Before Tax Attributable To Parent OtherComprehensiveIncomeLossBeforeTaxAttributableToParent	8000000	usd
CY2023	cof	Other Comprehensive Income Loss Other Tax Attributable To Parent OtherComprehensiveIncomeLossOtherTaxAttributableToParent	2000000	usd
CY2023	cof	Other Comprehensive Income Other Net Of Tax Attributable To Parent OtherComprehensiveIncomeOtherNetOfTaxAttributableToParent	6000000	usd
CY2022	cof	Other Comprehensive Income Loss Before Tax Attributable To Parent OtherComprehensiveIncomeLossBeforeTaxAttributableToParent	-24000000	usd
CY2022	cof	Other Comprehensive Income Loss Other Tax Attributable To Parent OtherComprehensiveIncomeLossOtherTaxAttributableToParent	-6000000	usd
CY2022	cof	Other Comprehensive Income Other Net Of Tax Attributable To Parent OtherComprehensiveIncomeOtherNetOfTaxAttributableToParent	-18000000	usd
CY2021	cof	Other Comprehensive Income Loss Before Tax Attributable To Parent OtherComprehensiveIncomeLossBeforeTaxAttributableToParent	4000000	usd
CY2021	cof	Other Comprehensive Income Loss Other Tax Attributable To Parent OtherComprehensiveIncomeLossOtherTaxAttributableToParent	1000000	usd
CY2021	cof	Other Comprehensive Income Other Net Of Tax Attributable To Parent OtherComprehensiveIncomeOtherNetOfTaxAttributableToParent	3000000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Before Tax Portion Attributable To Parent OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent	2103000000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Tax Portion Attributable To Parent1 OtherComprehensiveIncomeLossTaxPortionAttributableToParent1	455000000	usd
CY2023	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	1648000000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Before Tax Portion Attributable To Parent OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent	-13474000000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Tax Portion Attributable To Parent1 OtherComprehensiveIncomeLossTaxPortionAttributableToParent1	-3184000000	usd
CY2022	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-10290000000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Before Tax Portion Attributable To Parent OtherComprehensiveIncomeLossBeforeTaxPortionAttributableToParent	-4105000000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Tax Portion Attributable To Parent1 OtherComprehensiveIncomeLossTaxPortionAttributableToParent1	-985000000	usd
CY2021	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-3120000000	usd
CY2021	cof	Regulatory Capital Adjustments Net Of Tax Cecl Transition RegulatoryCapitalAdjustmentsNetOfTaxCECLTransition	2400000000	usd
CY2023	cof	Regulatory Capital Adjustments Net Of Tax Cecl Transition Phased In Amount Per Year RegulatoryCapitalAdjustmentsNetOfTaxCECLTransitionPhasedInAmountPerYear	600000000	usd
CY2023Q4	cof	Common Equity Tier One Capital Ratio Cecl Transition CommonEquityTierOneCapitalRatioCECLTransition	0.129
CY2023Q4	cof	Common Equity Tier One Capital Ratio Excluding Cecl Transition Adjustment CommonEquityTierOneCapitalRatioExcludingCECLTransitionAdjustment	0.126
CY2023Q4	us-gaap	Common Equity Tier One Capital CommonEquityTierOneCapital	47615000000	usd
CY2023Q4	cof	Common Equity Tier One Capitalto Risk Weighted Assets CommonEquityTierOneCapitaltoRiskWeightedAssets	0.129
CY2023Q4	cof	Tier One Common Capital Requiredfor Capital Adequacyto Risk Weighted Assets TierOneCommonCapitalRequiredforCapitalAdequacytoRiskWeightedAssets	0.045
CY2022Q4	us-gaap	Common Equity Tier One Capital CommonEquityTierOneCapital	44731000000	usd
CY2022Q4	cof	Common Equity Tier One Capitalto Risk Weighted Assets CommonEquityTierOneCapitaltoRiskWeightedAssets	0.125
CY2022Q4	cof	Tier One Common Capital Requiredfor Capital Adequacyto Risk Weighted Assets TierOneCommonCapitalRequiredforCapitalAdequacytoRiskWeightedAssets	0.045
CY2023Q4	us-gaap	Tier One Risk Based Capital TierOneRiskBasedCapital	52460000000	usd
CY2023Q4	us-gaap	Tier One Risk Based Capital To Risk Weighted Assets TierOneRiskBasedCapitalToRiskWeightedAssets	0.142
CY2023Q4	us-gaap	Tier One Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.060
CY2023Q4	us-gaap	Tier One Risk Based Capital Required To Be Well Capitalized To Risk Weighted Assets TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets	0.060
CY2022Q4	us-gaap	Tier One Risk Based Capital TierOneRiskBasedCapital	49576000000	usd
CY2022Q4	us-gaap	Tier One Risk Based Capital To Risk Weighted Assets TierOneRiskBasedCapitalToRiskWeightedAssets	0.139
CY2022Q4	us-gaap	Tier One Risk Based Capital Required For Capital Adequacy To Risk Weighted Assets TierOneRiskBasedCapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.060
CY2022Q4	us-gaap	Tier One Risk Based Capital Required To Be Well Capitalized To Risk Weighted Assets TierOneRiskBasedCapitalRequiredToBeWellCapitalizedToRiskWeightedAssets	0.060
CY2023Q4	us-gaap	Capital Capital	59124000000	usd
CY2023Q4	us-gaap	Capital To Risk Weighted Assets CapitalToRiskWeightedAssets	0.160
CY2023Q4	us-gaap	Capital Required For Capital Adequacy To Risk Weighted Assets CapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.080
CY2023Q4	us-gaap	Capital Required To Be Well Capitalized To Risk Weighted Assets CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets	0.100
CY2022Q4	us-gaap	Capital Capital	56714000000	usd
CY2022Q4	us-gaap	Capital To Risk Weighted Assets CapitalToRiskWeightedAssets	0.158
CY2022Q4	us-gaap	Capital Required For Capital Adequacy To Risk Weighted Assets CapitalRequiredForCapitalAdequacyToRiskWeightedAssets	0.080
CY2022Q4	us-gaap	Capital Required To Be Well Capitalized To Risk Weighted Assets CapitalRequiredToBeWellCapitalizedToRiskWeightedAssets	0.100
CY2023Q4	us-gaap	Tier One Leverage Capital TierOneLeverageCapital	52460000000	usd
CY2023Q4	us-gaap	Tier One Leverage Capital To Average Assets TierOneLeverageCapitalToAverageAssets	0.112
CY2023Q4	us-gaap	Tier One Leverage Capital Required For Capital Adequacy To Average Assets TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets	0.040
CY2022Q4	us-gaap	Tier One Leverage Capital TierOneLeverageCapital	49576000000	usd
CY2022Q4	us-gaap	Tier One Leverage Capital To Average Assets TierOneLeverageCapitalToAverageAssets	0.111
CY2022Q4	us-gaap	Tier One Leverage Capital Required For Capital Adequacy To Average Assets TierOneLeverageCapitalRequiredForCapitalAdequacyToAverageAssets	0.040
CY2023Q4	cof	Tieronecapitalunder Basel Ii Istandardizedapproach TieronecapitalunderBaselIIIstandardizedapproach	52460000000	usd
CY2023Q4	us-gaap	Supplementary Leverage Ratio SupplementaryLeverageRatio	0.096
CY2023Q4	cof	Minimum Capital Adequacyfor Supplementary Leverage Ratio MinimumCapitalAdequacyforSupplementaryLeverageRatio	0.030
CY2022Q4	cof	Tieronecapitalunder Basel Ii Istandardizedapproach TieronecapitalunderBaselIIIstandardizedapproach	49576000000	usd
CY2022Q4	us-gaap	Supplementary Leverage Ratio SupplementaryLeverageRatio	0.095
CY2022Q4	cof	Minimum Capital Adequacyfor Supplementary Leverage Ratio MinimumCapitalAdequacyforSupplementaryLeverageRatio	0.030
CY2023	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	4887000000	usd
CY2022	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	7360000000	usd
CY2021	us-gaap	Income Loss From Continuing Operations IncomeLossFromContinuingOperations	12394000000	usd
CY2023	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	0	usd
CY2022	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	0	usd
CY2021	us-gaap	Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity IncomeLossFromDiscontinuedOperationsNetOfTaxAttributableToReportingEntity	-4000000	usd
CY2023	us-gaap	Net Income Loss NetIncomeLoss	4887000000	usd
CY2022	us-gaap	Net Income Loss NetIncomeLoss	7360000000	usd
CY2021	us-gaap	Net Income Loss NetIncomeLoss	12390000000	usd
CY2023	cof	Participating Securities Distributedand Undistributed Earnings Lossexcluding Preferred Stock Dividends Basic ParticipatingSecuritiesDistributedandUndistributedEarningsLossexcludingPreferredStockDividendsBasic	77000000	usd
CY2022	cof	Participating Securities Distributedand Undistributed Earnings Lossexcluding Preferred Stock Dividends Basic ParticipatingSecuritiesDistributedandUndistributedEarningsLossexcludingPreferredStockDividendsBasic	88000000	usd
CY2021	cof	Participating Securities Distributedand Undistributed Earnings Lossexcluding Preferred Stock Dividends Basic ParticipatingSecuritiesDistributedandUndistributedEarningsLossexcludingPreferredStockDividendsBasic	105000000	usd
CY2023	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	228000000	usd
CY2022	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	228000000	usd
CY2021	us-gaap	Preferred Stock Dividends Income Statement Impact PreferredStockDividendsIncomeStatementImpact	274000000	usd
CY2023	cof	Issuance Cost For Preferred Stock Redeemed IssuanceCostForPreferredStockRedeemed	0	usd
CY2022	cof	Issuance Cost For Preferred Stock Redeemed IssuanceCostForPreferredStockRedeemed	0	usd
CY2021	cof	Issuance Cost For Preferred Stock Redeemed IssuanceCostForPreferredStockRedeemed	46000000	usd
CY2023	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	4582000000	usd
CY2022	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	7044000000	usd
CY2021	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	11965000000	usd
CY2023	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	382400000	shares
CY2022	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	391800000	shares
CY2021	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	442500000	shares
CY2023	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	100000	shares
CY2022	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	300000	shares
CY2021	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	700000	shares
CY2023	us-gaap	Incremental Common Shares Attributable To Contingently Issuable Shares IncrementalCommonSharesAttributableToContingentlyIssuableShares	900000	shares
CY2022	us-gaap	Incremental Common Shares Attributable To Contingently Issuable Shares IncrementalCommonSharesAttributableToContingentlyIssuableShares	1100000	shares
CY2021	us-gaap	Incremental Common Shares Attributable To Contingently Issuable Shares IncrementalCommonSharesAttributableToContingentlyIssuableShares	1000000.0	shares
CY2023	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	1000000.0	shares
CY2022	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	1400000	shares
CY2021	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	1700000	shares
CY2023	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	383400000	shares
CY2022	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	393200000	shares
CY2021	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	444200000	shares
CY2023	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	11.98
CY2022	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	17.98
CY2021	us-gaap	Income Loss From Continuing Operations Per Basic Share IncomeLossFromContinuingOperationsPerBasicShare	27.05
CY2023	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0.00
CY2022	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	0.00
CY2021	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Basic Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare	-0.01
CY2023	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	11.98
CY2022	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	17.98
CY2021	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	27.04
CY2023	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	11.95
CY2022	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	17.91
CY2021	us-gaap	Income Loss From Continuing Operations Per Diluted Share IncomeLossFromContinuingOperationsPerDilutedShare	26.95
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CY2022	us-gaap	Income Loss From Discontinued Operations Net Of Tax Per Diluted Share IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare	0.00
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Files In Submission

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$COF
CAPITAL ONE FINANCIAL CORP Stock $cof

2024 Q1 Form 10-K Financial Statement

#000092762824000094 Filed on February 23, 2024

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$COF CAPITAL ONE FINANCIAL CORP Stock $cof

2024 Q1 Form 10-K Financial Statement

#000092762824000094 Filed on February 23, 2024

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$COF
CAPITAL ONE FINANCIAL CORP Stock $cof