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Variable Interest Entities and Securitizations - Continuing Involvement in Securitization Related VIEs (Details) - USD ($)
$ in Millions
Jun. 30, 2022
Dec. 31, 2021
Credit Card    
Qualitative and Quantitative Information, Transferor's Continuing Involvement [Line Items]    
Securities held by third-party investors, non-mortgage $ 14,226 $ 12,808
Receivables in the trust, non-mortgage 21,343 22,454
Cash balance of spread or reserve accounts, non-mortgage 0 0
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Qualitative and Quantitative Information, Transferor's Continuing Involvement [Line Items]    
Securities held by third-party investors, non-mortgage 3,240 2,186
Receivables in the trust, non-mortgage 3,702 2,418
Cash balance of spread or reserve accounts, non-mortgage $ 18 $ 13