Net Investment in Operating Leases (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013
Property Subject to or Available for Operating Lease [Line Items]
Length of lease contract	60 months or less
Vehicles, at cost, including initial direct costs	$ 27,326		$ 24,952
Less: Accumulated depreciation	(3,898)		(3,396)
Net investment in operating leases before allowance for credit losses	23,428		21,556	$ 19,901
Less: Allowance for credit losses	(45)	$ (41)	(38)	(26)	$ (24)	$ (23)
Net investment in operating leases	23,383		21,518	$ 19,875
Securitization Transactions [Member]
Property Subject to or Available for Operating Lease [Line Items]
Net investment in operating leases	$ 11,900		$ 9,600