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Variable Interest Entities and Securitizations - Continuing Involvement in Securitization Related VIEs (Details) - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
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Credit Card |  |
Qualitative and Quantitative Information, Transferor's Continuing Involvement [Line Items] |  |
Securities held by third-party investors, non-mortgage | $ 10,361 | $ 15,798
Receivables in the trust, non-mortgage | 23,683 | 31,625
Cash balance of spread or reserve accounts, non-mortgage | 0 | 0
Auto |  |
Qualitative and Quantitative Information, Transferor's Continuing Involvement [Line Items] |  |
Securities held by third-party investors, non-mortgage | 2,053 | 2,010
Receivables in the trust, non-mortgage | 2,243 | 2,192
Cash balance of spread or reserve accounts, non-mortgage | 10 | 7
Home Loan |  |
Qualitative and Quantitative Information, Transferor's Continuing Involvement [Line Items] |  |
Securities held by third-party investors, mortgage | 790 | 962
Receivables in the trust, mortgage | 793 | 978
Cash balance of spread or reserve accounts, mortgage | $ 15 | $ 17

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- Definition Continuing Involvement with Continued to be Recognized Transferred Financial Assets, Cash Balance in Spread and Reserve Accounts + References No definition available. + Details
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- Definition Continuing Involvement with Continued to be Recognized Transferred Financial Assets, Liabilities Incurred + References No definition available. + Details
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- Definition Continuing Involvement with Derecognized Transferred Financial Assets, Cash Balance of Reserve or Spread Accounts + References No definition available. + Details
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- Definition Continuing Involvement with Derecognized Transferred Financial Assets, Liabilities Incurred + References No definition available. + Details
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- Definition Amount of transferred financial assets in which the transferor has continuing involvement with the assets underlying the transaction that have been derecognized. Continuing involvement includes, but is not limited to, servicing, recourse, and restrictions on transferor's interests in transferred financial assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=121570589&loc=d3e107314-111719 + Details
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- Definition Amount of transferred financial assets in which the transferor has continuing involvement with the assets underlying the transaction that continue to be recognized in the statement of financial position. Includes, but is not limited to, servicing, recourse, and restrictions on transferor's interests in transferred financial assets. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=121570589&loc=d3e107314-111719 + Details
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