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Supplementary Quarterly Financial Information (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Total net sales and revenue	$ 43,918	$ 42,825	$ 42,372	$ 37,265	$ 39,621	$ 38,843	$ 38,180	$ 35,712	$ 166,380	$ 152,356	$ 155,929
Net income	1,775	2,712	2,850	1,931	6,226	1,341	1,140	908	9,268	9,615	4,018
Net income attributable to stockholders	$ 1,835	$ 2,773	$ 2,866	$ 1,953	$ 6,266	$ 1,359	$ 1,117	$ 945	$ 9,427	$ 9,687	$ 3,949
Basic earnings per common share	$ 1.21	$ 1.79	$ 1.85	$ 1.26	$ 4.03	$ 0.86	$ 0.70	$ 0.58	$ 6.12	$ 6.11	$ 1.75
Diluted earnings per common share	$ 1.19	$ 1.76	$ 1.81	$ 1.24	$ 3.92	$ 0.84	$ 0.67	$ 0.56	$ 6.00	$ 5.91	$ 1.65
Gain on extinguishment of debt									$ 0	$ 449	$ 202
Corporate [Member] | Ignition Switch Recall Compensation Program [Member]
Charge related to ignition switch recall compensation program								$ 150
Corporate [Member] | Ignition Switch Recall Litigations [Member]
Charges for various legal matters related to the Ignition Switch Recall						$ 1,500
GME [Member]
Income Tax Expense (Benefit) from Change in Valuation Allowance					$ (3,900)
GME [Member] | Russia exit [Member]
Cost Related to Business Withdrawal								337
GMSA [Member] | Brazil
Gain on extinguishment of debt					449
GMSA [Member] | Venezuela
Charge for foreign currency devaluation							$ 604
GMIO [Member] | Russia exit [Member]
Cost Related to Business Withdrawal								91
GMIO [Member] | Thailand
Impairment Charges							297
Automotive [Member]
Automotive gross margin	$ 4,691	$ 5,556	$ 5,663	$ 4,606	$ 4,756	$ 5,082	$ 4,073	$ 3,690
Gain on extinguishment of debt										$ 449	$ 202

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