Segment Information (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
Segment Reporting Information [Line Items]
Total revenue	$ 2,599	$ 2,478	$ 2,338	$ 2,282	$ 2,291	$ 2,312	$ 2,234	$ 2,159	$ 9,697	$ 8,996	$ 8,182
Income before income taxes									2,086	1,854	1,756
Other disclosures [Abstract]
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
Provision for credit losses	108	$ 100	$ 72	$ 67	82	$ 57	$ 27	$ 31	347	197	146
Net finance receivables and net investment in operating leases	121,902				108,433				121,902	108,433	99,913
Total assets	137,448				122,108				137,448	122,108	115,608
Adjustment to Receivables [Member]
Segment Reporting Information [Line Items]
Total revenue									0	0	0
Income before income taxes									0	0	0
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases									0	0	0
Interest expense									0	0	0
Provision for credit losses									0	0	0
Net finance receivables and net investment in operating leases	(5,330)				(4,350)				(5,330)	(4,350)	(3,497)
Total assets	0				0				0	0	0
North America Segment [Member]
Segment Reporting Information [Line Items]
Total revenue									8,048	7,351	6,708
Income before income taxes									1,629	1,399	1,438
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases									3,603	3,045	2,369
Interest expense									1,811	2,010	2,088
Provision for credit losses									294	157	114
Net finance receivables and net investment in operating leases	103,268				91,021				103,268	91,021	83,722
Total assets	109,339				96,016				109,339	96,016	90,720
International Segment [Member]
Segment Reporting Information [Line Items]
Total revenue									1,650	1,651	1,527
Income before income taxes									458	461	371
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases									37	43	28
Interest expense									605	646	642
Provision for credit losses									53	40	32
Net finance receivables and net investment in operating leases	23,964				21,762				23,964	21,762	19,688
Total assets	28,109				26,092				28,109	26,092	24,888
Total Unallocated/Eliminations [Member]
Segment Reporting Information [Line Items]
Total revenue									(1)	(6)	(53)
Income before income taxes									(1)	(6)	(53)
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases									0	0	0
Interest expense									0	0	0
Provision for credit losses									0	0	0
Net finance receivables and net investment in operating leases	(5,330)				(4,350)				(5,330)	(4,350)	(3,497)
Total assets	0				0				0	0	0
Unallocated Risk Management [Member]
Segment Reporting Information [Line Items]
Total revenue									(1)	(6)	(53)
Income before income taxes									(1)	(6)	(53)
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases									0	0	0
Interest expense									0	0	0
Provision for credit losses									0	0	0
Net finance receivables and net investment in operating leases	0				0				0	0	0
Total assets	$ 0				$ 0				$ 0	$ 0	$ 0