XML 52 R41.htm IDEA: XBRL DOCUMENT v3.21.1

Loans - Loan Portfolio Composition and Aging Analysis (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020	Mar. 31, 2020
Financing Receivable, Recorded Investment, Aging [Abstract]
Current	$ 238,321	$ 245,060
Past due	4,810	6,564
Total Loans	$ 243,131	$ 251,624	$ 262,990
Financing Receivable, Recorded Investment, Aging, Percent of Total Loan [Abstract]
Current, percentage of total loans	98.02%	97.39%
Past due, percentage of total loans	1.98%	2.61%
Percentage of total loans	100.00%	100.00%
Unamortized premiums and discounts, deferred fees and costs	$ 1,100	$ 1,100
Accrued interest receivable	1,100	1,200
Credit Card
Financing Receivable, Recorded Investment, Aging [Abstract]
Current	96,878	104,334
Past due	2,249	2,622
Total Loans	99,127	106,956
Consumer Banking
Financing Receivable, Recorded Investment, Aging [Abstract]
Current	67,919	65,445
Past due	2,283	3,443
Total Loans	70,202	68,888
Consumer Banking | Auto
Financing Receivable, Recorded Investment, Aging [Abstract]
Current	64,828	62,381
Past due	2,231	3,381
Total Loans	67,059	65,762
Consumer Banking | Retail banking
Financing Receivable, Recorded Investment, Aging [Abstract]
Current	3,091	3,064
Past due	52	62
Total Loans	3,143	3,126
Commercial Banking
Financing Receivable, Recorded Investment, Aging [Abstract]
Current	73,524	75,281
Past due	278	499
Total Loans	73,802	75,780
Commercial Banking | Commercial and multifamily real estate
Financing Receivable, Recorded Investment, Aging [Abstract]
Current	29,854	30,340
Past due	154	341
Total Loans	30,008	30,681
Commercial Banking | Commercial and industrial
Financing Receivable, Recorded Investment, Aging [Abstract]
Current	43,670	44,941
Past due	124	158
Total Loans	43,794	45,099
30-59 days
Financing Receivable, Recorded Investment, Aging [Abstract]
Past due	$ 2,272	$ 3,330
Financing Receivable, Recorded Investment, Aging, Percent of Total Loan [Abstract]
Past due, percentage of total loans	0.94%	1.32%
30-59 days | Credit Card
Financing Receivable, Recorded Investment, Aging [Abstract]
Past due	$ 598	$ 845
30-59 days | Consumer Banking
Financing Receivable, Recorded Investment, Aging [Abstract]
Past due	1,593	2,280
30-59 days | Consumer Banking | Auto
Financing Receivable, Recorded Investment, Aging [Abstract]
Past due	1,565	2,252
30-59 days | Consumer Banking | Retail banking
Financing Receivable, Recorded Investment, Aging [Abstract]
Past due	28	28
Total Loans	28	28
30-59 days | Commercial Banking
Financing Receivable, Recorded Investment, Aging [Abstract]
Past due	81	205
30-59 days | Commercial Banking | Commercial and multifamily real estate
Financing Receivable, Recorded Investment, Aging [Abstract]
Past due	38	136
30-59 days | Commercial Banking | Commercial and industrial
Financing Receivable, Recorded Investment, Aging [Abstract]
Past due	43	69
60-89 days
Financing Receivable, Recorded Investment, Aging [Abstract]
Past due	$ 999	$ 1,485
Financing Receivable, Recorded Investment, Aging, Percent of Total Loan [Abstract]
Past due, percentage of total loans	0.41%	0.59%
60-89 days | Credit Card
Financing Receivable, Recorded Investment, Aging [Abstract]
Past due	$ 440	$ 522
60-89 days | Consumer Banking
Financing Receivable, Recorded Investment, Aging [Abstract]
Past due	553	926
60-89 days | Consumer Banking | Auto
Financing Receivable, Recorded Investment, Aging [Abstract]
Past due	545	907
60-89 days | Consumer Banking | Retail banking
Financing Receivable, Recorded Investment, Aging [Abstract]
Past due	8	19
Total Loans	8	19
60-89 days | Commercial Banking
Financing Receivable, Recorded Investment, Aging [Abstract]
Past due	6	37
60-89 days | Commercial Banking | Commercial and multifamily real estate
Financing Receivable, Recorded Investment, Aging [Abstract]
Past due	0	22
60-89 days | Commercial Banking | Commercial and industrial
Financing Receivable, Recorded Investment, Aging [Abstract]
Past due	6	15
Greater than 90 days
Financing Receivable, Recorded Investment, Aging [Abstract]
Past due	$ 1,539	$ 1,749
Financing Receivable, Recorded Investment, Aging, Percent of Total Loan [Abstract]
Past due, percentage of total loans	0.63%	0.70%
Greater than 90 days | Credit Card
Financing Receivable, Recorded Investment, Aging [Abstract]
Past due	$ 1,211	$ 1,255
Greater than 90 days | Consumer Banking
Financing Receivable, Recorded Investment, Aging [Abstract]
Past due	137	237
Greater than 90 days | Consumer Banking | Auto
Financing Receivable, Recorded Investment, Aging [Abstract]
Past due	121	222
Greater than 90 days | Consumer Banking | Retail banking
Financing Receivable, Recorded Investment, Aging [Abstract]
Past due	16	15
Total Loans	16	15
Greater than 90 days | Commercial Banking
Financing Receivable, Recorded Investment, Aging [Abstract]
Past due	191	257
Greater than 90 days | Commercial Banking | Commercial and multifamily real estate
Financing Receivable, Recorded Investment, Aging [Abstract]
Past due	116	183
Greater than 90 days | Commercial Banking | Commercial and industrial
Financing Receivable, Recorded Investment, Aging [Abstract]
Past due	75	74
Domestic credit card: | Credit Card
Financing Receivable, Recorded Investment, Aging [Abstract]
Current	89,059	96,116
Past due	2,040	2,388
Total Loans	91,099	98,504
Domestic credit card: | 30-59 days | Credit Card
Financing Receivable, Recorded Investment, Aging [Abstract]
Past due	527	755
Total Loans	527	755
Domestic credit card: | 60-89 days | Credit Card
Financing Receivable, Recorded Investment, Aging [Abstract]
Past due	393	464
Total Loans	393	464
Domestic credit card: | Greater than 90 days | Credit Card
Financing Receivable, Recorded Investment, Aging [Abstract]
Past due	1,120	1,169
Total Loans	1,120	1,169
International card businesses: | Credit Card
Financing Receivable, Recorded Investment, Aging [Abstract]
Current	7,819	8,218
Past due	209	234
Total Loans	8,028	8,452
International card businesses: | 30-59 days | Credit Card
Financing Receivable, Recorded Investment, Aging [Abstract]
Past due	71	90
Total Loans	71	90
International card businesses: | 60-89 days | Credit Card
Financing Receivable, Recorded Investment, Aging [Abstract]
Past due	47	58
Total Loans	47	58
International card businesses: | Greater than 90 days | Credit Card
Financing Receivable, Recorded Investment, Aging [Abstract]
Past due	91	86
Total Loans	$ 91	$ 86

X

- Definition

Financing Receivable, Percent Current

+ References

No definition available.

+ Details

Name:	cof_FinancingReceivablePercentCurrent
Namespace Prefix:	cof_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Financing Receivable Percentage Of Total Loan

+ References

No definition available.

+ Details

Name:	cof_FinancingReceivablePercentageofTotalLoan
Namespace Prefix:	cof_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Financing Receivable, Recorded Investment, Aging, Percent of Total Loan [Abstract]

+ References

No definition available.

+ Details

Name:	cof_FinancingReceivableRecordedInvestmentAgingPercentofTotalLoanAbstract
Namespace Prefix:	cof_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount, before allowance for credit loss, of accrued interest on financing receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 3B
-URI http://asc.fasb.org/extlink&oid=121599337&loc=SL120267963-210447

+ Details

Name:	us-gaap_FinancingReceivableAccruedInterestBeforeAllowanceForCreditLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Percentage of financing receivable balance that is past due.

+ References

No definition available.

+ Details

Name:	us-gaap_FinancingReceivablePercentPastDue1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

X

- References

No definition available.

+ Details

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

X

- Definition

Amount of financing receivable not past due.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 7A
-URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953401-111524

Reference 2: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 55
-Paragraph 80
-URI http://asc.fasb.org/extlink&oid=121647567&loc=SL82922355-210448

Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 14
-URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919253-210447

+ Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amount of financing receivable past due.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 55
-Paragraph 80
-URI http://asc.fasb.org/extlink&oid=121647567&loc=SL82922355-210448

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 14
-URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919253-210447

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 7A
-URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953401-111524

+ Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentPastDue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amount, before allowance for credit loss, of financing receivable.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 55
-Paragraph 79
-URI http://asc.fasb.org/extlink&oid=121647567&loc=SL82922352-210448

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 50
-Paragraph 5
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919230-210447

Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 20
-Section 55
-Paragraph 80
-URI http://asc.fasb.org/extlink&oid=121647567&loc=SL82922355-210448

+ Details

Name:	us-gaap_NotesReceivableGross
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Amount of deferred fees paid by borrowers and unamortized costs incurred to originate loans and leases, unamortized loan commitments and loan syndication fees, and premiums over or discounts from face amounts of loans that are being amortized into income as an adjustment to yield. Excludes amounts for loans and leases covered under loss sharing agreements.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 20
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6378536&loc=d3e10092-111533

+ Details

Name:	us-gaap_UnamortizedLoanCommitmentAndOriginationFeesAndUnamortizedDiscountsOrPremiums
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=cof_CreditCardPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_ConsumerPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=us-gaap_AutomobileLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=cof_RetailBankingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_CommercialPortfolioSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=cof_CommercialAndMultifamilyRealEstateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=cof_CommercialAndIndustrialMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancingReceivables30To59DaysPastDueMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancingReceivables60To89DaysPastDueMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancingReceivablesEqualToGreaterThan90DaysPastDueMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_GeographicDistributionAxis=us-gaap_GeographicDistributionDomesticMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_GeographicDistributionAxis=us-gaap_GeographicDistributionForeignMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: