Net Investment in Operating Leases (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015	Dec. 31, 2014
Property Subject to or Available for Operating Lease [Line Items]
Length of lease contract	60 months or less
Vehicles, at cost	$ 30,803	$ 29,673
Accumulated depreciation	(4,862)	(4,545)
Net investment in operating leases before allowance for credit losses	25,941	25,128	$ 22,025
Allowance for credit losses	(53)	(49)	(41)	$ (38)
Net investment in operating leases	25,888	25,079	$ 21,984
Securitization Transactions [Member]
Property Subject to or Available for Operating Lease [Line Items]
Net investment in operating leases	$ 13,300	$ 13,300