Segment Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Dec. 31, 2017
Segment Reporting Information [Line Items]
Total revenue	$ 3,020	$ 2,731
Income before income taxes	641	481
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases	1,028	1,064
Interest expense	912	729
Provision for credit losses	119	152
Net finance receivables and net investment in operating leases	147,651	133,003
Total assets	165,083	149,532	$ 160,443
Operating Segments [Member]
Segment Reporting Information [Line Items]
Total revenue	3,020	2,731
Income before income taxes	672	463
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases	1,028	1,064
Interest expense	915	729
Provision for credit losses	119	152
Net finance receivables and net investment in operating leases	155,668	139,958
Total assets	165,083	149,532
Operating Segments [Member] | Americas [Member]
Segment Reporting Information [Line Items]
Total revenue	2,581	2,405
Income before income taxes	515	358
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases	1,023	1,053
Interest expense	752	617
Provision for credit losses	111	144
Net finance receivables and net investment in operating leases	120,392	114,171
Total assets	127,013	119,990
Operating Segments [Member] | Europe [Member]
Segment Reporting Information [Line Items]
Total revenue	295	228
Income before income taxes	111	77
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases	5	11
Interest expense	72	61
Provision for credit losses	5	6
Net finance receivables and net investment in operating leases	27,702	20,840
Total assets	30,109	23,906
Operating Segments [Member] | Asia Pacific [Member]
Segment Reporting Information [Line Items]
Total revenue	144	98
Income before income taxes	46	28
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases	0	0
Interest expense	91	51
Provision for credit losses	3	2
Net finance receivables and net investment in operating leases	7,574	4,947
Total assets	7,961	5,636
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Total revenue	0	0
Income before income taxes	(31)	18
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases	0	0
Interest expense	(3)	0
Provision for credit losses	0	0
Net finance receivables and net investment in operating leases	(8,017)	(6,955)
Total assets	$ 0	$ 0