Guarantor Condensed Consolidating Financial Statements - Current Period Guarantor Balance Sheet (Details) - USD ($) $ in Millions	Sep. 30, 2017	Dec. 31, 2016
Assets
Cash and cash equivalents	$ 3,976	$ 2,815
Finance receivables, net	40,864	33,475
Leased vehicles, net	41,775	34,342
Goodwill	1,201	1,196
Equity in net assets of non-consolidated affiliate (Note 6)	1,119	944
Related party receivables (Note 3)	339	347
Other assets (Note 8 VIEs)	4,767	3,695
Assets held for sale (Note 2)	12,094	10,951
Due from affiliates	0	0
Investment in affiliates	0	0
Total assets	106,135	87,765
Liabilities
Secured debt (Note 7; Note 8 VIEs)	40,775	35,087
Unsecured debt (Note 7)	38,263	29,476
Deferred income	3,066	2,355
Related party payables (Note 3)	253	320
Other liabilities	2,449	2,141
Liabilities held for sale (Note 2)	10,858	9,693
Due to affiliates	0	0
Total liabilities	95,664	79,072
Shareholders' equity
Common stock	0	0
Preferred stock	0	0
Additional paid-in capital	7,514	6,505
Accumulated other comprehensive loss (Note 14)	(935)	(1,238)
Retained earnings	3,892	3,426
Total shareholders' equity	10,471	8,693
Total liabilities and shareholders' equity	106,135	87,765
Parent Company [Member]
Assets
Cash and cash equivalents		0
Finance receivables, net	0	0
Leased vehicles, net	0	0
Goodwill	1,095	1,095
Equity in net assets of non-consolidated affiliate (Note 6)	0	0
Related party receivables (Note 3)	0	0
Other assets (Note 8 VIEs)	855	506
Assets held for sale (Note 2)	0	0
Due from affiliates	32,762	24,548
Investment in affiliates	10,177	8,986
Total assets	44,889	35,135
Liabilities
Secured debt (Note 7; Note 8 VIEs)	0	0
Unsecured debt (Note 7)	34,047	26,076
Deferred income	0	0
Related party payables (Note 3)	2	1
Other liabilities	369	365
Liabilities held for sale (Note 2)	0	0
Due to affiliates	0	0
Total liabilities	34,418	26,442
Shareholders' equity
Common stock	0	0
Preferred stock	0
Additional paid-in capital	7,514	6,505
Accumulated other comprehensive loss (Note 14)	(935)	(1,238)
Retained earnings	3,892	3,426
Total shareholders' equity	10,471	8,693
Total liabilities and shareholders' equity	44,889	35,135
Guarantor [Member]
Assets
Cash and cash equivalents	3,546	2,284
Finance receivables, net	10,097	4,969
Leased vehicles, net	0	0
Goodwill	0	0
Equity in net assets of non-consolidated affiliate (Note 6)	0	0
Related party receivables (Note 3)	38	25
Other assets (Note 8 VIEs)	1,230	884
Assets held for sale (Note 2)	0	0
Due from affiliates	19,467	16,065
Investment in affiliates	5,610	6,445
Total assets	39,988	30,672
Liabilities
Secured debt (Note 7; Note 8 VIEs)	0	0
Unsecured debt (Note 7)	0	0
Deferred income	0	0
Related party payables (Note 3)	0	0
Other liabilities	772	690
Liabilities held for sale (Note 2)	0	0
Due to affiliates	32,576	24,437
Total liabilities	33,348	25,127
Shareholders' equity
Common stock	0	0
Preferred stock	0
Additional paid-in capital	79	79
Accumulated other comprehensive loss (Note 14)	(107)	(161)
Retained earnings	6,668	5,627
Total shareholders' equity	6,640	5,545
Total liabilities and shareholders' equity	39,988	30,672
Non-Guarantors [Member]
Assets
Cash and cash equivalents	430	531
Finance receivables, net	30,767	28,506
Leased vehicles, net	41,775	34,342
Goodwill	106	101
Equity in net assets of non-consolidated affiliate (Note 6)	1,119	944
Related party receivables (Note 3)	301	322
Other assets (Note 8 VIEs)	3,933	3,065
Assets held for sale (Note 2)	12,095	10,959
Due from affiliates	0	0
Investment in affiliates	0	0
Total assets	90,526	78,770
Liabilities
Secured debt (Note 7; Note 8 VIEs)	41,177	35,256
Unsecured debt (Note 7)	4,216	3,400
Deferred income	3,066	2,355
Related party payables (Note 3)	251	319
Other liabilities	2,157	1,677
Liabilities held for sale (Note 2)	10,864	9,694
Due to affiliates	19,648	16,183
Total liabilities	81,379	68,884
Shareholders' equity
Common stock	698	698
Preferred stock	0
Additional paid-in capital	3,450	5,345
Accumulated other comprehensive loss (Note 14)	(874)	(1,223)
Retained earnings	5,873	5,066
Total shareholders' equity	9,147	9,886
Total liabilities and shareholders' equity	90,526	78,770
Eliminations [Member]
Assets
Cash and cash equivalents		0
Finance receivables, net	0	0
Leased vehicles, net	0	0
Goodwill	0	0
Equity in net assets of non-consolidated affiliate (Note 6)	0	0
Related party receivables (Note 3)	0	0
Other assets (Note 8 VIEs)	(1,251)	(760)
Assets held for sale (Note 2)	(1)	(8)
Due from affiliates	(52,229)	(40,613)
Investment in affiliates	(15,787)	(15,431)
Total assets	(69,268)	(56,812)
Liabilities
Secured debt (Note 7; Note 8 VIEs)	(402)	(169)
Unsecured debt (Note 7)	0	0
Deferred income	0	0
Related party payables (Note 3)	0	0
Other liabilities	(849)	(591)
Liabilities held for sale (Note 2)	(6)	(1)
Due to affiliates	(52,224)	(40,620)
Total liabilities	(53,481)	(41,381)
Shareholders' equity
Common stock	(698)	(698)
Preferred stock	0
Additional paid-in capital	(3,529)	(5,424)
Accumulated other comprehensive loss (Note 14)	981	1,384
Retained earnings	(12,541)	(10,693)
Total shareholders' equity	(15,787)	(15,431)
Total liabilities and shareholders' equity	$ (69,268)	$ (56,812)