Fair Value Measurements - Schedule of Level 3 Investments at Fair Value (Details) - Securitization residual assets - Level 3 - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Balance, beginning of period	$ 220	$ 193	$ 219	$ 177
Accretion of securitization residual assets	4	4	8	7
Additions to securitization residual assets	21	21	28	26
Collections of securitization residual assets	(2)	(9)	(5)	(10)
Unrealized gains (losses) on securitization residual assets recorded in OCI	(5)	(5)	(12)	4
Balance, end of period	$ 238	$ 204	$ 238	$ 204