Annual report pursuant to Section 13 and 15(d)

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

v3.20.4
Fair Value Measurements - Reconciles Beginning and Ending Balances Level 3 Residual Assets Fair Value Recurring Basis (Details) - Securitization residual assets - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Balance, beginning of period $ 122 $ 71
Accretion of securitization residual assets 6 4
Additions to securitization residual assets 54 59
Collections of securitization residual assets (11) (7)
Sales of securitization residual assets (21) (13)
Unrealized gains (losses) on securitization residual assets recorded in OCI 9 8
Balance, end of period $ 159 $ 122