Leased Vehicles - Summary of Leased Vehicles (Details) - Assets Leased to Others [Member] - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Lessor, Lease, Description [Line Items]
Leased vehicles	$ 61,820	$ 62,767
Manufacturer subvention	(9,653)	(9,731)
Net capitalized cost	52,167	53,036
Less: accumulated depreciation	(10,871)	(10,981)
Leased vehicles, net	$ 41,296	$ 42,055