Segment Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Dec. 31, 2018
Segment Reporting Information [Line Items]
Total revenue	$ 3,194	$ 3,020
Income before income taxes	801	641
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases	(924)	(1,053)
Interest expense	1,121	912
Provision for credit losses	33	94
Net finance receivables and net investment in operating leases	146,856	147,651
Total assets	165,415	165,083	$ 162,209
Operating Segments [Member]
Segment Reporting Information [Line Items]
Total revenue	3,194	3,020
Income before income taxes	794	672
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases	(924)	(1,053)
Interest expense	1,113	915
Provision for credit losses	33	94
Net finance receivables and net investment in operating leases	155,274	155,668
Total assets	165,415	165,083
Operating Segments [Member] | Americas [Member]
Segment Reporting Information [Line Items]
Total revenue	2,793	2,581
Income before income taxes	644	515
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases	(912)	(1,048)
Interest expense	972	752
Provision for credit losses	38	86
Net finance receivables and net investment in operating leases	123,323	120,392
Total assets	130,603	127,013
Operating Segments [Member] | Europe [Member]
Segment Reporting Information [Line Items]
Total revenue	303	295
Income before income taxes	116	111
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases	(12)	(5)
Interest expense	80	72
Provision for credit losses	5	5
Net finance receivables and net investment in operating leases	27,066	27,702
Total assets	29,459	30,109
Operating Segments [Member] | Asia Pacific [Member]
Segment Reporting Information [Line Items]
Total revenue	98	144
Income before income taxes	34	46
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases	0	0
Interest expense	61	91
Provision for credit losses	(10)	3
Net finance receivables and net investment in operating leases	4,885	7,574
Total assets	5,353	7,961
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Total revenue	0	0
Income before income taxes	7	(31)
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases	0	0
Interest expense	8	(3)
Provision for credit losses	0	0
Net finance receivables and net investment in operating leases	(8,418)	(8,017)
Total assets	$ 0	$ 0