Other Operating Expenses (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Operating Expenses [Abstract]
Insurance commissions	$ 161	$ 158	$ 322	$ 315
Technology and communications	103	111	209	219
Advertising and marketing	79	79	152	157
Property and equipment depreciation	57	48	114	95
Regulatory and licensing fees	38	39	92	74
Lease and loan administration	43	53	91	101
Professional services	39	36	70	68
Vehicle remarketing and repossession	32	28	65	55
Amortization of intangible assets	5	6	11	13
Other	106	109	214	211
Total other operating expenses	$ 663	$ 667	$ 1,340	$ 1,308