Other Operating Expenses (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Operating Expenses [Abstract]
Insurance commissions	$ 647	$ 636	$ 610
Technology and communications	438	436	406
Advertising and marketing	285	308	366
Property and equipment depreciation	224	196	165
Lease and loan administration	181	210	201
Regulatory and licensing fees	180	205	119
Professional services	147	145	173
Vehicle remarketing and repossession	129	116	91
Amortization of intangible assets	19	25	31
Other	425	414	345
Total other operating expenses	$ 2,675	$ 2,691	$ 2,507