Leased Vehicles Leased Vehicles Summary (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
	Mar. 31, 2014	Dec. 31, 2013	Mar. 31, 2013
Property Subject to or Available for Operating Lease, Net [Abstract]
Leased Vehicles Accounted For Operating Leases Net Of Manufacturing Incentives	$ 4,025	$ 1,976	$ 2,444
Leased Vehicles Purchased	773	620
Leased Vehicles Returned (End of Term)	(208)	(52)
Leased Vehicles Returned (Default)	(11)	(4)
Manufacturing Incentives	(80)	(82)
Foreign Currency Translation On Leases	(43)	(14)
Leased Vehicles Accounted For Operating Leases Net Of Manufacturing Incentives	$ 4,456	$ 4,025	$ 2,444