Segment Information (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Dec. 31, 2012
Segment Reporting Information [Line Items]
Total revenue	$ 2,284	$ 2,069	$ 6,560	$ 6,156
Income before income taxes	427	393	1,388	1,283
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases	830	640	2,197	1,808
Interest expense	691	741	2,056	2,318
Provision for credit losses	32	42	81	(33)
Net finance receivables and net investment in operating leases	97,528	85,466	97,528	85,466
Total assets	113,288	101,327	113,288	101,327	105,744
Segment, Geographical, Groups of Countries, Group Two [Member]
Segment Reporting Information [Line Items]
Quantifying Misstatement in Current Year Financial Statements, Amount				37
North America Segment [Member]
Segment Reporting Information [Line Items]
Total revenue	1,829	1,636	5,271	4,885
Income before income taxes	358	334	1,156	1,173
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases	739	550	1,981	1,547
Interest expense	536	551	1,576	1,704
Provision for credit losses	31	41	57	(33)
Net finance receivables and net investment in operating leases	79,914	70,335	79,914	70,335
Total assets	91,099	81,521	91,099	81,521
International Segment [Member]
Segment Reporting Information [Line Items]
Total revenue	477	437	1,327	1,370
Income before income taxes	91	63	270	202
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases	91	90	216	261
Interest expense	155	190	480	622
Provision for credit losses	1	1	24	0
Net finance receivables and net investment in operating leases	19,096	16,688	19,096	16,688
Total assets	23,671	21,363	23,671	21,363
Total Unallocated/Eliminations [Member]
Segment Reporting Information [Line Items]
Total revenue	(22)	(4)	(38)	(99)
Income before income taxes	(22)	(4)	(38)	(92)
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases	0	0	0	0
Interest expense	0	0	0	(8)
Provision for credit losses	0	0	0	0
Net finance receivables and net investment in operating leases	(1,482)	(1,557)	(1,482)	(1,557)
Total assets	(1,482)	(1,557)	(1,482)	(1,557)
Unallocated Risk Management [Member]
Segment Reporting Information [Line Items]
Total revenue	(22)	(4)	(38)	(99)
Income before income taxes	(22)	(4)	(38)	(92)
Other disclosures [Abstract]
Depreciation on vehicles subject to operating leases	0	0	0	0
Interest expense	0	0	0	(8)
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
Effect of Unearned Interest Supplements [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	(1,482)	(1,557)	(1,482)	(1,557)
Total assets	$ (1,482)	$ (1,557)	$ (1,482)	$ (1,557)