Segment Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Dec. 31, 2019
Segment Reporting Information [Line Items]
Total revenue	$ 2,855	$ 3,127	$ 8,680	$ 9,509
Income before income taxes	1,123	736	1,696	2,368
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases	(537)	(894)	(2,579)	(2,712)
Interest expense	792	1,081	2,615	3,316
Provision for credit losses	86	93	765	189
Net finance receivables and net investment in operating leases	131,481	140,301	131,481	140,301
Total assets	154,518	160,883	154,518	160,883	$ 161,426
Operating Segments [Member]
Segment Reporting Information [Line Items]
Total revenue	2,855	3,127	8,680	9,509
Income before income taxes	1,019	681	1,592	2,214
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases	(537)	(894)	(2,579)	(2,712)
Interest expense	802	1,080	2,665	3,309
Provision for credit losses	86	93	765	189
Net finance receivables and net investment in operating leases	140,618	148,718	140,618	148,718
Total assets	154,518	160,883	154,518	160,883
Operating Segments [Member] | Americas [Member]
Segment Reporting Information [Line Items]
Total revenue	2,510	2,678	7,589	8,105
Income before income taxes	932	583	1,399	1,794
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases	(549)	(884)	(2,578)	(2,681)
Interest expense	666	912	2,237	2,782
Provision for credit losses	79	80	675	168
Net finance receivables and net investment in operating leases	114,266	118,065	114,266	118,065
Total assets	123,939	126,831	123,939	126,831
Operating Segments [Member] | Europe [Member]
Segment Reporting Information [Line Items]
Total revenue	245	286	770	896
Income before income taxes	73	78	155	305
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases	(12)	(10)	(1)	(31)
Interest expense	87	86	259	252
Provision for credit losses	1	6	68	18
Net finance receivables and net investment in operating leases	22,023	25,518	22,023	25,518
Total assets	25,720	28,185	25,720	28,185
Operating Segments [Member] | Asia Pacific [Member]
Segment Reporting Information [Line Items]
Total revenue	100	163	321	508
Income before income taxes	14	20	38	115
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases	0	0	0	0
Interest expense	49	82	169	275
Provision for credit losses	6	7	22	3
Net finance receivables and net investment in operating leases	4,329	5,135	4,329	5,135
Total assets	4,859	5,867	4,859	5,867
Corporate, Non-Segment [Member]
Segment Reporting Information [Line Items]
Total revenue	0	0	0	0
Income before income taxes	104	55	104	154
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases	0	0	0	0
Interest expense	(10)	1	(50)	7
Provision for credit losses	0	0	0	0
Net finance receivables and net investment in operating leases	(9,137)	(8,417)	(9,137)	(8,417)
Total assets	$ 0	$ 0	$ 0	$ 0