XML 53 R42.htm IDEA: XBRL DOCUMENT
v3.21.1

Loans - 90+ Day Delinquent Loans Accruing Interest and Nonperforming Loans (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2021 | Mar. 31, 2020 | Dec. 31, 2020
Financing Receivable, Past Due [Line Items] |  |  |
90 Days Past Due and Accruing | $ 1,207 |  | $ 1,302
Nonperforming Loans | 924 |  | 995
Nonperforming Loans Without an Allowance | $ 485 |  | $ 449
Percentage, 90 Days Past Due and Accruing | 0.50% |  | 0.50%
Percentage, Nonperforming Loans | 0.40% |  | 0.40%
Percentage, Nonperforming Loans Without an Allowance | 0.20% |  | 0.20%
Interest income for loans classified as nonperforming | $ 1 | $ 2 |
Credit Card |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
90 Days Past Due and Accruing | 1,207 |  | $ 1,251
Nonperforming Loans | 14 |  | 21
Nonperforming Loans Without an Allowance | 0 |  | 0
Credit Card | Domestic credit card: |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
90 Days Past Due and Accruing | 1,120 |  | 1,169
Nonperforming Loans Without an Allowance | 0 |  | 0
Credit Card | International card businesses: |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
90 Days Past Due and Accruing | 87 |  | 82
Nonperforming Loans | 14 |  | 21
Nonperforming Loans Without an Allowance | 0 |  | 0
Consumer Banking |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
90 Days Past Due and Accruing | 0 |  | 0
Nonperforming Loans | 228 |  | 324
Nonperforming Loans Without an Allowance | 11 |  | 0
Consumer Banking | Auto |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
90 Days Past Due and Accruing | 0 |  | 0
Nonperforming Loans | 192 |  | 294
Nonperforming Loans Without an Allowance | 0 |  | 0
Consumer Banking | Retail banking |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
90 Days Past Due and Accruing | 0 |  | 0
Nonperforming Loans | 36 |  | 30
Nonperforming Loans Without an Allowance | 11 |  | 0
Commercial Banking |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
90 Days Past Due and Accruing | 0 |  | 51
Nonperforming Loans | 682 |  | 650
Nonperforming Loans Without an Allowance | 474 |  | 449
Commercial Banking | Commercial and multifamily real estate |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
90 Days Past Due and Accruing | 0 |  | 51
Nonperforming Loans | 234 |  | 200
Nonperforming Loans Without an Allowance | 219 |  | 184
Commercial Banking | Commercial and industrial |  |  |
Financing Receivable, Past Due [Line Items] |  |  |
90 Days Past Due and Accruing | 0 |  | 0
Nonperforming Loans | 448 |  | 450
Nonperforming Loans Without an Allowance | $ 255 |  | $ 265

X
- Definition Financing Receivable, Nonaccrual, No Allowance, Percent Past Due + References No definition available. + Details
Name: | cof_FinancingReceivableNonaccrualNoAllowancePercentPastDue
Namespace Prefix: | cof_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Financing Receivable, Percent 90 Days Past Due and Still Accruing + References No definition available. + Details
Name: | cof_FinancingReceivablePercent90DaysPastDueandStillAccruing
Namespace Prefix: | cof_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of interest income on financing receivable on nonaccrual status. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 16 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919258-210447 + Details
Name: | us-gaap_FinancingReceivableNonaccrualInterestIncome
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount of financing receivable on nonaccrual status with no allowance for credit loss. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 16 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919258-210447 + Details
Name: | us-gaap_FinancingReceivableNonaccrualNoAllowance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Percentage of nonaccrual financing receivable balance outstanding that is past due. + References No definition available. + Details
Name: | us-gaap_FinancingReceivableNonaccrualPercentPastDue1
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of financing receivable 90 days or more past due and still accruing. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 16 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919258-210447 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=121611835&loc=d3e5111-111524 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_FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of financing receivable on nonaccrual status. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 7 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121611835&loc=d3e5111-111524 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 20 -Section 50 -Paragraph 16 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121599337&loc=SL82919258-210447 + Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentNonaccrualStatus
Namespace Prefix: | us-gaap_
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 No definition available. + Details
Name: | us-gaap_FinancingReceivableRecordedInvestmentPastDueLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_FinancingReceivablePortfolioSegmentAxis=cof_CreditCardPortfolioSegmentMember
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: |

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: |