Segment Information (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Total revenue	$ 2,817	$ 2,796	$ 2,688	$ 2,608	$ 2,599	$ 2,478	$ 2,338	$ 2,282	$ 10,909	$ 9,697	$ 8,996
Income before income taxes									1,879	2,086	1,854
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases	1,155	1,085	1,075	1,014	1,010	956	858	816	4,329	3,640	3,088
Interest expense	725	697	687	646	597	582	599	638	2,755	2,416	2,656
Provision for credit losses	144	$ 138	$ 137	$ 128	108	$ 100	$ 72	$ 67	547	347	197
Net finance receivables and net investment in operating leases	130,190				121,902				130,190	121,902	108,433
Total assets	146,089				137,448				146,089	137,448	122,108
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	(6,675)				(5,330)				(6,675)	(5,330)	(4,350)
Total assets	0				0				0	0	0
International Segment [Member]
Segment Reporting Information [Line Items]
Total revenue									1,650	1,650	1,651
Income before income taxes									402	458	461
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases									38	37	43
Interest expense									584	605	646
Provision for credit losses									71	53	40
Net finance receivables and net investment in operating leases	25,202				23,964				25,202	23,964	21,762
Total assets	29,313				28,109				29,313	28,109	26,092
Total Unallocated/Eliminations [Member]
Segment Reporting Information [Line Items]
Total revenue									69	(1)	(6)
Income before income taxes									69	(1)	(6)
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	(6,675)				(5,330)				(6,675)	(5,330)	(4,350)
Total assets	0				0				0	0	0
Unallocated Risk Management [Member]
Segment Reporting Information [Line Items]
Total revenue									69	(1)	(6)
Income before income taxes									69	(1)	(6)
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
North America [Member]
Segment Reporting Information [Line Items]
Total revenue									9,190	8,048	7,351
Income before income taxes									1,408	1,629	1,399
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases									4,291	3,603	3,045
Interest expense									2,171	1,811	2,010
Provision for credit losses									476	294	157
Net finance receivables and net investment in operating leases	111,663				103,268				111,663	103,268	91,021
Total assets	$ 116,776				$ 109,339				$ 116,776	$ 109,339	$ 96,016