Leased Vehicles - Leased Vehicles, Net (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Property, Plant, and Equipment, Lessor Asset under Operating Lease [Abstract]
Leased vehicles	$ 42,343	$ 46,069
Manufacturer subvention	(4,422)	(5,150)
Net capitalized cost	37,921	40,919
Less: accumulated depreciation	(7,338)	(8,218)
Leased vehicles, net	30,582	32,701	$ 37,900
Depreciation expense	$ 4,900	$ 4,800	$ 6,100