XML 64 R52.htm IDEA: XBRL DOCUMENT
v3.24.1.u1

Loans - FDM Disclosure - Modification to Borrowers (Details) - USD ($) $ in Millions | Mar. 31, 2024 | Mar. 31, 2023
--- | --- | ---
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | $ 3,032 | $ 787
Commitments to lend on loans modified in TDRs | 190 | 26
Current |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 2,493 | 527
30-59 days |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 170 | 89
60-89 days |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 148 | 34
Greater than 90 days |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 221 | 137
Total Delinquent Loans |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 539 | 260
Credit Card: |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 752 | 188
Credit Card: | Current |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 460 | 73
Credit Card: | 30-59 days |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 77 | 41
Credit Card: | 60-89 days |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 66 | 27
Credit Card: | Greater than 90 days |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 149 | 47
Credit Card: | Total Delinquent Loans |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 292 | 115
Credit Card: | Domestic Card |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 646 | 150
Credit Card: | Domestic Card | Current |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 407 | 62
Credit Card: | Domestic Card | 30-59 days |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 67 | 36
Credit Card: | Domestic Card | 60-89 days |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 56 | 23
Credit Card: | Domestic Card | Greater than 90 days |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 116 | 29
Credit Card: | Domestic Card | Total Delinquent Loans |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 239 | 88
Credit Card: | International card businesses |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 106 | 38
Credit Card: | International card businesses | Current |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 53 | 11
Credit Card: | International card businesses | 30-59 days |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 10 | 5
Credit Card: | International card businesses | 60-89 days |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 10 | 4
Credit Card: | International card businesses | Greater than 90 days |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 33 | 18
Credit Card: | International card businesses | Total Delinquent Loans |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 53 | 27
Consumer Banking: |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 802 | 255
Consumer Banking: | Current |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 635 | 226
Consumer Banking: | 30-59 days |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 93 | 18
Consumer Banking: | 60-89 days |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 55 | 7
Consumer Banking: | Greater than 90 days |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 19 | 4
Consumer Banking: | Total Delinquent Loans |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 167 | 29
Consumer Banking: | Auto |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 792 | 252
Consumer Banking: | Auto | Current |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 626 | 224
Consumer Banking: | Auto | 30-59 days |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 93 | 18
Consumer Banking: | Auto | 60-89 days |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 54 | 7
Consumer Banking: | Auto | Greater than 90 days |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 19 | 3
Consumer Banking: | Auto | Total Delinquent Loans |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 166 | 28
Consumer Banking: | Retail banking |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 10 | 3
Consumer Banking: | Retail banking | Current |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 9 | 2
Consumer Banking: | Retail banking | 30-59 days |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 0 | 0
Consumer Banking: | Retail banking | 60-89 days |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 1 | 0
Consumer Banking: | Retail banking | Greater than 90 days |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 0 | 1
Consumer Banking: | Retail banking | Total Delinquent Loans |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 1 | 1
Commercial Banking: |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 1,478 | 344
Commercial Banking: | Current |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 1,398 | 228
Commercial Banking: | 30-59 days |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 0 | 30
Commercial Banking: | 60-89 days |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 27 | 0
Commercial Banking: | Greater than 90 days |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 53 | 86
Commercial Banking: | Total Delinquent Loans |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 80 | 116
Commercial Banking: | Commercial and multifamily real estate |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 578 | 129
Commercial Banking: | Commercial and multifamily real estate | Current |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 556 | 99
Commercial Banking: | Commercial and multifamily real estate | 30-59 days |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 0 | 30
Commercial Banking: | Commercial and multifamily real estate | 60-89 days |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 0 | 0
Commercial Banking: | Commercial and multifamily real estate | Greater than 90 days |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 22 | 0
Commercial Banking: | Commercial and multifamily real estate | Total Delinquent Loans |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 22 | 30
Commercial Banking: | Commercial and industrial |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 900 | 215
Commercial Banking: | Commercial and industrial | Current |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 842 | 129
Commercial Banking: | Commercial and industrial | 30-59 days |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 0 | 0
Commercial Banking: | Commercial and industrial | 60-89 days |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 27 | 0
Commercial Banking: | Commercial and industrial | Greater than 90 days |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | 31 | 86
Commercial Banking: | Commercial and industrial | Total Delinquent Loans |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Total Loans | $ 58 | $ 86

X
- Definition Financing Receivable, Excluding Accrued Interest, Modified, after 12 Months + References No definition available. + Details
Name: | cof_FinancingReceivableExcludingAccruedInterestModifiedAfter12Months
Namespace Prefix: | cof_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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 Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 42 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-42 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 42 -Subparagraph (a)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-42 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 55 -Paragraph 12A -Publisher FASB -URI https://asc.fasb.org//1943274/2147481933/310-10-55-12A Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 33 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-33 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 34 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-34 + Details
Name: | us-gaap_FinancingReceivableModificationsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of commitment to lend additional funds to debtor experiencing financial difficulty for which creditor has modified terms of financing receivable. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 310 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 36 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-36 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name Accounting Standards Codification -Section 50 -Paragraph 1 -SubTopic 40 -Topic 310 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481746/310-40-50-1 + Details
Name: | us-gaap_LoansAndLeasesReceivableImpairedCommitmentToLend
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancialAssetNotPastDueMember
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_FinancingReceivablesPeriodPastDueAxis=us-gaap_FinancialAssetPastDueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=cof_DomesticCardMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentByClassOfFinancingReceivableAxis=cof_InternationalCardBusinessMember
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: |