Annual report pursuant to Section 13 and 15(d)

Securitizations and Other Variable Interest Entities - Other Asset-backed Securitizations, Additional Information (Details)

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Securitizations and Other Variable Interest Entities - Other Asset-backed Securitizations, Additional Information (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Unconsolidated VIEs      
Variable Interest Entity [Line Items]      
Liquidity commitments to unconsolidated securitization trusts $ 1,100 $ 218  
Credit Card Receivable      
Variable Interest Entity [Line Items]      
Principal balance outstanding $ 7,400 7,700  
Transferred financial assets, stated interest rate 0.00%    
Credit Card Receivable | Senior Lien      
Variable Interest Entity [Line Items]      
Transferred financial assets, amount issued $ 1,300 4,000 $ 3,100
Credit Card Receivable | Junior Lien      
Variable Interest Entity [Line Items]      
Transferred financial assets, amount issued 202 650 500
Resecuritization Trusts      
Variable Interest Entity [Line Items]      
Cash proceeds from new securitizations 24,400 22,800 25,100
Resecuritization Trusts | Debt securities      
Variable Interest Entity [Line Items]      
Cash proceeds from new securitizations 5,200 4,100 $ 3,300
Municipal Bond Trusts | Unconsolidated VIEs      
Variable Interest Entity [Line Items]      
Liquidity commitments to unconsolidated securitization trusts $ 3,700 $ 2,100  
Weighted average remaining life of bonds held in the trusts in years 10 years