Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Reconciles Beginning and Ending Balances Level 3 Residual Assets Fair Value Recurring Basis (Details)

v3.20.2
Fair Value Measurements - Reconciles Beginning and Ending Balances Level 3 Residual Assets Fair Value Recurring Basis (Details) - Securitization residual assets - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]        
Balance, beginning of period $ 135 $ 79 $ 122 $ 71
Accretion of securitization residual assets 2 1 4 3
Additions to securitization residual assets 9 10 36 25
Collections of securitization residual assets (4) (1) (9) (6)
Sales of securitization residual assets 0 (13) (21) (18)
Unrealized gains (losses) on securitization residual assets recorded in AOCI 0 8 10 9
Balance, end of period $ 142 $ 84 $ 142 $ 84