Guarantor Consolidating Financial Statements - Current Period Guarantor Balance Sheet (Details) - USD ($) $ in Millions	Dec. 31, 2016	Dec. 31, 2015	Jan. 02, 2015	Dec. 31, 2014	Dec. 31, 2013
Condensed Balance Sheet Statements, Captions [Line Items]
Cash and cash equivalents	$ 3,201	$ 3,061
Finance receivables, net	43,190	36,781
Leased vehicles, net	34,526	20,172		$ 7,100
Goodwill	1,196	1,189	$ 371	$ 1,244	$ 1,240
Equity in net assets of non-consolidated affiliates	944	986
Property and equipment, net	279	219
Deferred income taxes	274	231
Related party receivables	510	573
Other assets	3,645	2,692
Due from affiliates	0	0
Investment in affiliates	0	0
Total assets	87,765	65,904
Secured debt	39,270	30,689
Unsecured debt	34,606	23,657
Accounts payable and accrued expenses	1,474	1,218
Deferred income	2,365	1,454
Deferred income taxes	220	129
Related party payables	400	362
Other liabilities	737	343
Due to affiliates	0	0
Total liabilities	79,072	57,852
Common stock	0	0
Additional paid-in capital	6,505	6,484
Accumulated other comprehensive loss	(1,238)	(1,104)
Retained earnings	3,426	2,672
Total shareholder's equity	8,693	8,052
Total liabilities and shareholder's equity	87,765	65,904
General Motors Financial Company, Inc. [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Cash and cash equivalents	0	0
Finance receivables, net	0	0
Leased vehicles, net	0	0
Goodwill	1,095	1,095
Equity in net assets of non-consolidated affiliates	0	0
Property and equipment, net	0	0
Deferred income taxes	502	212
Related party receivables	0	0
Other assets	4	32
Due from affiliates	24,548	15,573
Investment in affiliates	8,986	8,476
Total assets	35,135	25,388
Secured debt	0	0
Unsecured debt	26,076	17,087
Accounts payable and accrued expenses	302	181
Deferred income	0	0
Deferred income taxes	0	0
Related party payables	1	0
Other liabilities	63	68
Due to affiliates	0	0
Total liabilities	26,442	17,336
Common stock	0	0
Additional paid-in capital	6,505	6,484
Accumulated other comprehensive loss	(1,238)	(1,104)
Retained earnings	3,426	2,672
Total shareholder's equity	8,693	8,052
Total liabilities and shareholder's equity	35,135	25,388
Guarantor [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Cash and cash equivalents	2,284	2,259
Finance receivables, net	4,969	4,808
Leased vehicles, net	0	0
Goodwill	0	0
Equity in net assets of non-consolidated affiliates	0	0
Property and equipment, net	152	41
Deferred income taxes	89	0
Related party receivables	25	27
Other assets	643	92
Due from affiliates	16,065	7,556
Investment in affiliates	6,445	6,425
Total assets	30,672	21,208
Secured debt	0	0
Unsecured debt	0	0
Accounts payable and accrued expenses	273	717
Deferred income	0	0
Deferred income taxes	0	289
Related party payables	0	0
Other liabilities	417	34
Due to affiliates	24,437	15,495
Total liabilities	25,127	16,535
Common stock	0	0
Additional paid-in capital	79	79
Accumulated other comprehensive loss	(161)	(175)
Retained earnings	5,627	4,769
Total shareholder's equity	5,545	4,673
Total liabilities and shareholder's equity	30,672	21,208
Non-Guarantors [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Cash and cash equivalents	917	802
Finance receivables, net	38,221	31,973
Leased vehicles, net	34,526	20,172
Goodwill	101	94
Equity in net assets of non-consolidated affiliates	944	986
Property and equipment, net	127	178
Deferred income taxes	274	179
Related party receivables	485	546
Other assets	3,167	2,568
Due from affiliates	0	0
Investment in affiliates	0	0
Total assets	78,762	57,498
Secured debt	39,439	30,689
Unsecured debt	8,530	6,570
Accounts payable and accrued expenses	899	320
Deferred income	2,365	1,454
Deferred income taxes	811	0
Related party payables	399	362
Other liabilities	257	241
Due to affiliates	16,176	7,634
Total liabilities	68,876	47,270
Common stock	698	698
Additional paid-in capital	5,345	6,490
Accumulated other comprehensive loss	(1,223)	(1,095)
Retained earnings	5,066	4,135
Total shareholder's equity	9,886	10,228
Total liabilities and shareholder's equity	78,762	57,498
Eliminations [Member]
Condensed Balance Sheet Statements, Captions [Line Items]
Cash and cash equivalents	0	0
Finance receivables, net	0	0
Leased vehicles, net	0	0
Goodwill	0	0
Equity in net assets of non-consolidated affiliates	0	0
Property and equipment, net	0	0
Deferred income taxes	(591)	(160)
Related party receivables	0	0
Other assets	(169)	0
Due from affiliates	(40,613)	(23,129)
Investment in affiliates	(15,431)	(14,901)
Total assets	(56,804)	(38,190)
Secured debt	(169)	0
Unsecured debt	0	0
Accounts payable and accrued expenses	0	0
Deferred income	0	0
Deferred income taxes	(591)	(160)
Related party payables	0	0
Other liabilities	0	0
Due to affiliates	(40,613)	(23,129)
Total liabilities	(41,373)	(23,289)
Common stock	(698)	(698)
Additional paid-in capital	(5,424)	(6,569)
Accumulated other comprehensive loss	1,384	1,270
Retained earnings	(10,693)	(8,904)
Total shareholder's equity	(15,431)	(14,901)
Total liabilities and shareholder's equity	$ (56,804)	$ (38,190)