Selected Quarterly Financial Data (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Selected Quarterly Financial Data [Line Items]
Financing Revenue Reclassification		$ 201	$ 172	$ 161	$ 176	$ 181	$ 174	$ 162		$ (693)	$ (659)
Total revenue	2,156	2,083	1,983	1,960	1,941	1,888	1,846	1,905	8,182	7,580	8,064
Depreciation on vehicles subject to operating leases	(734)	(629)	(553)	(481)	(484)	(459)	(409)	(423)	(2,397)	(1,775)	(1,115)
Interest expense	(674)	(691)	(682)	(683)	(709)	(741)	(774)	(803)	(2,730)	(3,027)	(3,507)
Total financing margin and other revenue	748	763	748	796	748	688	663	679	3,055	2,778	3,442
Provision for credit losses	65	32	20	29	40	42	(51)	(24)	146	7	(118)
Net income	568	272	275	364	268	355	296	295	1,479	1,214	1,795
Lease Interest Supplements and Acquisition Costs [Member]
Selected Quarterly Financial Data [Line Items]
Financing Revenue Reclassification	$ 0	$ 201	$ 172	$ 161	$ 176	$ 181	$ 174	$ 162		$ 693	$ 659