Leased Vehicles (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Property Subject to or Available for Operating Lease, Net [Abstract]
Leased vehicles	$ 9,747	$ 4,684
Manufacturing Incentives	(1,479)	(659)
Leased Vehicles Accounted For Operating Leases Net Of Manufacturing Incentives	8,268	4,025	1,976	887
Less: accumulated depreciation	(1,208)	(642)
Leased vehicles, net	$ 7,060	$ 3,383