Leased Vehicles - Summary of Leased Vehicles (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Lessor Disclosure [Abstract]
Leased vehicles	$ 52,401		$ 54,821
Manufacturer subvention	(6,732)		(7,398)
Net capitalized cost	45,669		47,423
Less: accumulated depreciation	(9,088)		(9,494)
Leased vehicles, net	36,581		$ 37,929
Depreciation expense	$ 1,200	$ 1,700