Segment Information (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Segment Reporting Information [Line Items]
Total revenue	$ 3,127,000,000	$ 3,081,000,000	$ 9,509,000,000	$ 9,200,000,000
Income before income taxes	736,000,000	678,000,000	2,368,000,000	1,964,000,000
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases	(894,000,000)	(936,000,000)	(2,712,000,000)	(2,975,000,000)
Interest expense	1,081,000,000	989,000,000	3,316,000,000	2,898,000,000
Provision for credit losses	93,000,000	127,000,000	189,000,000	290,000,000
Net finance receivables and net investment in operating leases	140,301,000,000	143,614,000,000	140,301,000,000	143,614,000,000
Total assets	160,883,000,000	161,246,000,000	160,883,000,000	161,246,000,000	$ 162,209,000,000
Operating Segments [Member]
Segment Reporting Information [Line Items]
Total revenue	3,127,000,000	3,081,000,000	9,509,000,000	9,200,000,000
Income before income taxes	681,000,000	658,000,000	2,214,000,000	2,008,000,000
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases	(894,000,000)	(936,000,000)	(2,712,000,000)	(2,975,000,000)
Interest expense	1,080,000,000	991,000,000	3,309,000,000	2,902,000,000
Provision for credit losses	93,000,000	127,000,000	189,000,000	290,000,000
Net finance receivables and net investment in operating leases	148,718,000,000	152,140,000,000	148,718,000,000	152,140,000,000
Total assets	160,883,000,000	161,246,000,000	160,883,000,000	161,246,000,000
Operating Segments [Member] | Americas [Member]
Segment Reporting Information [Line Items]
Total revenue	2,764,000,000	2,677,000,000	8,349,000,000	7,918,000,000
Income before income taxes	584,000,000	556,000,000	1,836,000,000	1,619,000,000
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases	(884,000,000)	(924,000,000)	(2,681,000,000)	(2,955,000,000)
Interest expense	951,000,000	848,000,000	2,902,000,000	2,430,000,000
Provision for credit losses	86,000,000	116,000,000	178,000,000	263,000,000
Net finance receivables and net investment in operating leases	119,463,000,000	120,425,000,000	119,463,000,000	120,425,000,000
Total assets	128,603,000,000	128,103,000,000	128,603,000,000	128,103,000,000
Operating Segments [Member] | Europe [Member]
Segment Reporting Information [Line Items]
Total revenue	286,000,000	284,000,000	896,000,000	878,000,000
Income before income taxes	82,000,000	89,000,000	314,000,000	303,000,000
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases	(10,000,000)	(12,000,000)	(31,000,000)	(20,000,000)
Interest expense	86,000,000	68,000,000	252,000,000	216,000,000
Provision for credit losses	6,000,000	1,000,000	18,000,000	14,000,000
Net finance receivables and net investment in operating leases	25,518,000,000	25,995,000,000	25,518,000,000	25,995,000,000
Total assets	28,185,000,000	27,120,000,000	28,185,000,000	27,120,000,000
Operating Segments [Member] | Asia Pacific [Member]
Segment Reporting Information [Line Items]
Total revenue	77,000,000	120,000,000	264,000,000	404,000,000
Income before income taxes	15,000,000	13,000,000	64,000,000	86,000,000
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases	0	0	0	0
Interest expense	43,000,000	75,000,000	155,000,000	256,000,000
Provision for credit losses	1,000,000	10,000,000	(7,000,000)	13,000,000
Net finance receivables and net investment in operating leases	3,737,000,000	5,720,000,000	3,737,000,000	5,720,000,000
Total assets	4,095,000,000	6,023,000,000	4,095,000,000	6,023,000,000
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Total revenue	0	0	0	0
Income before income taxes	55,000,000	20,000,000	154,000,000	(44,000,000)
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases	0	0	0	0
Interest expense	1,000,000	(2,000,000)	7,000,000	(4,000,000)
Provision for credit losses	0	0	0	0
Net finance receivables and net investment in operating leases	(8,417,000,000)	(8,526,000,000)	(8,417,000,000)	(8,526,000,000)
Total assets	$ 0	$ 0	$ 0	$ 0