Segment Information (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Segment Reporting Information [Line Items]
Total revenue	$ 3,188,000,000	$ 3,099,000,000	$ 6,382,000,000	$ 6,119,000,000
Income before income taxes	831,000,000	645,000,000	1,632,000,000	1,286,000,000
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases	(894,000,000)	(986,000,000)	(1,818,000,000)	(2,039,000,000)
Interest expense	1,114,000,000	997,000,000	2,235,000,000	1,909,000,000
Provision for credit losses	63,000,000	69,000,000	96,000,000	163,000,000
Net finance receivables and net investment in operating leases	143,479,000,000	143,207,000,000	143,479,000,000	143,207,000,000
Total assets	164,018,000,000	159,611,000,000	164,018,000,000	159,611,000,000	$ 162,209,000,000
Operating Segments [Member]
Segment Reporting Information [Line Items]
Total revenue	3,188,000,000	3,099,000,000	6,382,000,000	6,119,000,000
Income before income taxes	739,000,000	678,000,000	1,533,000,000	1,350,000,000
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases	(894,000,000)	(986,000,000)	(1,818,000,000)	(2,039,000,000)
Interest expense	1,116,000,000	996,000,000	2,229,000,000	1,911,000,000
Provision for credit losses	63,000,000	69,000,000	96,000,000	163,000,000
Net finance receivables and net investment in operating leases	151,922,000,000	151,453,000,000	151,922,000,000	151,453,000,000
Total assets	164,018,000,000	159,611,000,000	164,018,000,000	159,611,000,000
Operating Segments [Member] | Americas [Member]
Segment Reporting Information [Line Items]
Total revenue	2,792,000,000	2,661,000,000	5,585,000,000	5,241,000,000
Income before income taxes	608,000,000	548,000,000	1,252,000,000	1,063,000,000
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases	(885,000,000)	(983,000,000)	(1,797,000,000)	(2,031,000,000)
Interest expense	979,000,000	830,000,000	1,951,000,000	1,582,000,000
Provision for credit losses	54,000,000	61,000,000	92,000,000	147,000,000
Net finance receivables and net investment in operating leases	120,486,000,000	119,611,000,000	120,486,000,000	119,611,000,000
Total assets	130,735,000,000	125,436,000,000	130,735,000,000	125,436,000,000
Operating Segments [Member] | Europe [Member]
Segment Reporting Information [Line Items]
Total revenue	307,000,000	298,000,000	610,000,000	594,000,000
Income before income taxes	116,000,000	103,000,000	232,000,000	214,000,000
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases	(9,000,000)	(3,000,000)	(21,000,000)	(8,000,000)
Interest expense	86,000,000	76,000,000	166,000,000	148,000,000
Provision for credit losses	7,000,000	8,000,000	12,000,000	13,000,000
Net finance receivables and net investment in operating leases	27,224,000,000	25,437,000,000	27,224,000,000	25,437,000,000
Total assets	28,745,000,000	27,391,000,000	28,745,000,000	27,391,000,000
Operating Segments [Member] | Asia Pacific [Member]
Segment Reporting Information [Line Items]
Total revenue	89,000,000	140,000,000	187,000,000	284,000,000
Income before income taxes	15,000,000	27,000,000	49,000,000	73,000,000
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases	0	0	0	0
Interest expense	51,000,000	90,000,000	112,000,000	181,000,000
Provision for credit losses	2,000,000	0	(8,000,000)	3,000,000
Net finance receivables and net investment in operating leases	4,212,000,000	6,405,000,000	4,212,000,000	6,405,000,000
Total assets	4,538,000,000	6,784,000,000	4,538,000,000	6,784,000,000
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Total revenue	0	0	0	0
Income before income taxes	92,000,000	(33,000,000)	99,000,000	(64,000,000)
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases	0	0	0	0
Interest expense	(2,000,000)	1,000,000	6,000,000	(2,000,000)
Provision for credit losses	0	0	0	0
Net finance receivables and net investment in operating leases	(8,443,000,000)	(8,246,000,000)	(8,443,000,000)	(8,246,000,000)
Total assets	$ 0	$ 0	$ 0	$ 0