Segment Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Dec. 31, 2014
Segment Reporting Information [Line Items]
Total revenue	$ 2,338	$ 2,234	$ 4,620	$ 4,393
Income before income taxes	506	434	989	933
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases	858	742	1,674	1,447
Interest expense	599	673	1,237	1,339
Provision for credit losses	72	27	139	58
Net finance receivables and net investment in operating leases	112,926	106,593	112,926	106,593
Total assets	127,599	120,441	127,599	120,441	$ 122,108
North America Segment [Member]
Segment Reporting Information [Line Items]
Total revenue	1,951	1,818	3,848	3,587
Income before income taxes	406	317	785	695
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases	849	732	1,660	1,427
Interest expense	448	511	930	1,023
Provision for credit losses	60	17	115	46
Net finance receivables and net investment in operating leases	94,831	87,583	94,831	87,583
Total assets	100,475	93,367	100,475	93,367
International Segment [Member]
Segment Reporting Information [Line Items]
Total revenue	400	419	810	820
Income before income taxes	113	120	242	252
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases	9	10	14	20
Interest expense	151	162	307	316
Provision for credit losses	12	10	24	12
Net finance receivables and net investment in operating leases	22,726	22,992	22,726	22,992
Total assets	27,124	27,074	27,124	27,074
Unallocated Risk Management [Member]
Segment Reporting Information [Line Items]
Total revenue	(13)	(3)	(38)	(14)
Income before income taxes	(13)	(3)	(38)	(14)
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases	0	0	0	0
Interest expense	0	0	0	0
Provision for credit losses	0	0	0	0
Net finance receivables and net investment in operating leases	0	0	0	0
Total assets	0	0	0	0
Adjustment to Receivables [Member]
Segment Reporting Information [Line Items]
Total revenue	0	0	0	0
Income before income taxes	0	0	0	0
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases	0	0	0	0
Interest expense	0	0	0	0
Provision for credit losses	0	0	0	0
Net finance receivables and net investment in operating leases	(4,631)	(3,982)	(4,631)	(3,982)
Total assets	0	0	0	0
Total Unallocated/Eliminations [Member]
Segment Reporting Information [Line Items]
Total revenue	(13)	(3)	(38)	(14)
Income before income taxes	(13)	(3)	(38)	(14)
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases	0	0	0	0
Interest expense	0	0		0
Provision for credit losses	0	0	0	0
Net finance receivables and net investment in operating leases	(4,631)	(3,982)	(4,631)	(3,982)
Total assets	$ 0	$ 0	$ 0	$ 0