Selected Quarterly Financial Data (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Quarterly Financial Information Disclosure [Abstract]
Total revenue	$ 2,599	$ 2,478	$ 2,338	$ 2,282	$ 2,291	$ 2,312	$ 2,234	$ 2,159	$ 9,697	$ 8,996	$ 8,182
Depreciation on vehicles subject to operating leases	(1,010)	(956)	(858)	(816)	(840)	(801)	(742)	(705)	(3,640)	(3,088)	(2,397)
Interest expense	(597)	(582)	(599)	(638)	(654)	(663)	(673)	(666)	(2,416)	(2,656)	(2,730)
Total financing margin and other revenue	992	940	881	828	797	848	819	788	3,641	3,252	3,055
Provision for credit losses	108	100	72	67	82	57	27	31	347	197	146
Net income	$ 352	$ 365	$ 340	$ 306	$ 411	718	$ 264	$ 312	$ 1,363	$ 1,705	$ 1,479
Effective Income Tax Rate Reconciliation, Tax Credit, Foreign, Amount						$ 360