XML 143 R118.htm IDEA: XBRL DOCUMENT v3.22.4

Fair Value Measurement - Nonrecurring Fair Value Measurements Included in Earnings (Details) - Nonrecurring - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Loans held for investment	$ 30	$ 2
Other assets	(38)	(72)
Total	$ (8)	$ (70)

X

- Definition

Gain (Loss) On Fair Value Assets measured on nonrecurring basis

+ References

No definition available.

+ Details

Name:	cof_GainLossOnFairValueAssetsRecognizedInEarnings
Namespace Prefix:	cof_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Gain (Loss) On Fair Value Loans Held For Investment measured on nonrecurring basis

+ References

No definition available.

+ Details

Name:	cof_GainLossOnFairValueLoansHeldForInvestmentRecognizedInEarnings
Namespace Prefix:	cof_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Gain (Loss) On Fair Value Other Assets measured on nonrecurring basis

+ References

No definition available.

+ Details

Name:	cof_GainLossOnFairValueOtherAssetsRecognizedInEarnings
Namespace Prefix:	cof_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_FairValueByMeasurementFrequencyAxis=us-gaap_FairValueMeasurementsNonrecurringMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: