Quarterly report pursuant to Section 13 or 15(d)

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

v3.19.1
Securitizations and Other Variable Interest Entities - Other Asset-backed Securitizations, Additional Information (Details) - USD ($)
 3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Dec. 31, 2018
Unconsolidated VIEs      
Variable Interest Entity [Line Items]      
Liquidity commitments to unconsolidated securitization trusts $ 220,000,000   $ 218,000,000
Credit Card Receivable      
Variable Interest Entity [Line Items]      
Principal balance outstanding $ 7,300,000,000   7,700,000,000
Transferred financial assets, stated interest rate 0.00%    
Credit Card Receivable | Senior Lien      
Variable Interest Entity [Line Items]      
Transferred financial assets, amount issued $ 0 $ 1,600,000,000  
Credit Card Receivable | Junior Lien      
Variable Interest Entity [Line Items]      
Transferred financial assets, amount issued 0 254,000,000  
Resecuritization Trusts      
Variable Interest Entity [Line Items]      
Cash proceeds from new securitizations 4,400,000,000 6,700,000,000  
Resecuritization Trusts | Debt securities      
Variable Interest Entity [Line Items]      
Cash proceeds from new securitizations 1,300,000,000 $ 1,300,000,000  
Municipal Bond Trusts | Unconsolidated VIEs      
Variable Interest Entity [Line Items]      
Liquidity commitments to unconsolidated securitization trusts $ 2,300,000,000   $ 2,100,000,000
Weighted average remaining life of bonds held in the trusts in years 7 years 3 months 18 days