XML 92 R81.htm IDEA: XBRL DOCUMENT
v3.21.1

Business Segments and Revenue from Contracts with Customers - Revenue from Contracts with Customers (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020
Disaggregation of Revenue [Line Items] |  |
Total contract revenue | $ 1,001 | $ 937
Revenue from other sources | 290 | 287
Non-interest income (loss) | 1,291 | 1,224
Operating segments | Credit Card |  |
Disaggregation of Revenue [Line Items] |  |
Total contract revenue | 813 | 758
Revenue from other sources | 216 | 153
Non-interest income (loss) | 1,029 | 911
Operating segments | Consumer Banking |  |
Disaggregation of Revenue [Line Items] |  |
Total contract revenue | 120 | 133
Revenue from other sources | 21 | (7)
Non-interest income (loss) | 141 | 126
Operating segments | Commercial Banking |  |
Disaggregation of Revenue [Line Items] |  |
Total contract revenue | 68 | 47
Revenue from other sources | 172 | 191
Non-interest income (loss) | 240 | 238
Other |  |
Disaggregation of Revenue [Line Items] |  |
Total contract revenue | 0 | (1)
Revenue from other sources | (119) | (50)
Non-interest income (loss) | (119) | (51)
Interchange fees, net |  |
Disaggregation of Revenue [Line Items] |  |
Total contract revenue | 817 | 752
Interchange fees, net | Operating segments | Credit Card |  |
Disaggregation of Revenue [Line Items] |  |
Total contract revenue | 743 | 688
Interchange fees, net | Operating segments | Consumer Banking |  |
Disaggregation of Revenue [Line Items] |  |
Total contract revenue | 57 | 50
Interchange fees, net | Operating segments | Commercial Banking |  |
Disaggregation of Revenue [Line Items] |  |
Total contract revenue | 17 | 15
Interchange fees, net | Other |  |
Disaggregation of Revenue [Line Items] |  |
Total contract revenue | 0 | (1)
Service charges and other customer-related fees |  |
Disaggregation of Revenue [Line Items] |  |
Total contract revenue | 94 | 95
Service charges and other customer-related fees | Operating segments | Credit Card |  |
Disaggregation of Revenue [Line Items] |  |
Total contract revenue | 0 | 0
Service charges and other customer-related fees | Operating segments | Consumer Banking |  |
Disaggregation of Revenue [Line Items] |  |
Total contract revenue | 44 | 64
Service charges and other customer-related fees | Operating segments | Commercial Banking |  |
Disaggregation of Revenue [Line Items] |  |
Total contract revenue | 50 | 31
Service charges and other customer-related fees | Other |  |
Disaggregation of Revenue [Line Items] |  |
Total contract revenue | 0 | 0
Other |  |
Disaggregation of Revenue [Line Items] |  |
Total contract revenue | 90 | 90
Other | Operating segments | Credit Card |  |
Disaggregation of Revenue [Line Items] |  |
Total contract revenue | 70 | 70
Other | Operating segments | Consumer Banking |  |
Disaggregation of Revenue [Line Items] |  |
Total contract revenue | 19 | 19
Other | Operating segments | Commercial Banking |  |
Disaggregation of Revenue [Line Items] |  |
Total contract revenue | 1 | 1
Other | Other |  |
Disaggregation of Revenue [Line Items] |  |
Total contract revenue | $ 0 | $ 0

X
- Definition Noninterest Income, Excluding Revenue from Contract with Customer + References No definition available. + Details
Name: | cof_NoninterestIncomeExcludingRevenuefromContractwithCustomer
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_DisaggregationOfRevenueLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The total amount of noninterest income which may be derived from: (1) fees and commissions; (2) premiums earned; (3) insurance policy charges; (4) the sale or disposal of assets; and (5) other sources not otherwise specified. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.13) -URI http://asc.fasb.org/extlink&oid=120399700&loc=SL114874048-224260 + Details
Name: | us-gaap_NoninterestIncome
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8906-108599 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 40 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9031-108599 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9038-108599 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8933-108599 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130543-203045 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599 Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e8736-108599 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 42 -URI http://asc.fasb.org/extlink&oid=120311839&loc=d3e9054-108599 Reference 10: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130545-203045 Reference 11: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 924 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 11.L) -URI http://asc.fasb.org/extlink&oid=6472922&loc=d3e499488-122856 + Details
Name: | us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | srt_ConsolidationItemsAxis=us-gaap_OperatingSegmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=cof_CreditCardSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=cof_ConsumerBankingSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=cof_CommercialBankingSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidationItemsAxis=us-gaap_CorporateNonSegmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=cof_InterchangeFeesContractsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=cof_ServiceChargesAndOtherCustomerFeesContractsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ProductOrServiceAxis=cof_OtherContractRevenueMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |