Quarterly report pursuant to Section 13 or 15(d)

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

v3.19.2
Securitizations and Other Variable Interest Entities - Other Asset-backed Securitizations, Additional Information (Details) - USD ($)
 3 Months Ended 6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Jun. 30, 2019
Jun. 30, 2018
Dec. 31, 2018
Unconsolidated VIEs          
Variable Interest Entity [Line Items]          
Liquidity commitments to unconsolidated securitization trusts $ 355,000,000   $ 355,000,000   $ 218,000,000
Credit Card Receivable          
Variable Interest Entity [Line Items]          
Principal balance outstanding $ 7,200,000,000   $ 7,200,000,000   7,700,000,000
Transferred financial assets, stated interest rate 0.00%   0.00%    
Credit Card Receivable | Senior Lien          
Variable Interest Entity [Line Items]          
Transferred financial assets, amount issued     $ 0 $ 2,800,000,000  
Credit Card Receivable | Junior Lien          
Variable Interest Entity [Line Items]          
Transferred financial assets, amount issued     0 448,000,000  
Resecuritization Trusts          
Variable Interest Entity [Line Items]          
Cash proceeds from new securitizations $ 4,100,000,000 $ 6,800,000,000 8,500,000,000 13,600,000,000  
Resecuritization Trusts | Debt securities          
Variable Interest Entity [Line Items]          
Cash proceeds from new securitizations 1,500,000,000 $ 910,000,000 2,800,000,000 $ 2,200,000,000  
Municipal Bond Trusts | Unconsolidated VIEs          
Variable Interest Entity [Line Items]          
Liquidity commitments to unconsolidated securitization trusts $ 3,000,000,000.0   $ 3,000,000,000.0   $ 2,100,000,000
Weighted average remaining life of bonds held in the trusts in years 11 years 4 months 24 days