v3.2.0.727
Segment Reporting (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended 9 Months Ended 15 Months Ended
Jun. 30, 2015
Mar. 31, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Dec. 31, 2014
Jun. 30, 2015
Segment Reporting Information [Line Items]              
Net sales and revenue $ 38,180   $ 39,649 $ 73,892 $ 77,057    
Income (loss) before automotive interest and taxes-adjusted 2,871   1,351 4,953 1,817    
Adjustments (1,110)   (1,279) (1,657) (1,706)    
Income before income taxes 1,717   33 3,154 89    
Income tax benefit (expense) (577)   254 (1,106) 478    
Net (income) loss attributable to noncontrolling interests (23)   (9) 14 (76)    
Net income attributable to stockholders 1,117   278 2,062 491    
Total assets 185,812   179,098 185,812 179,098 $ 177,677 $ 185,812
Depreciation, amortization and impairment of long lived assets and finite lived intangible assets 2,170   1,819 3,927 3,426    
Ignition Switch Recall Compensation Program [Member]              
Segment Reporting Information [Line Items]              
Charge related to Ignition Switch Recall Compensation Program 75 $ 150 400     $ 400 625
Automotive [Member]              
Segment Reporting Information [Line Items]              
Automotive interest income 41   52 90 105    
Automotive interest expense (108)   (100) (218) (203)    
Group [Member] | Operating Segments [Member]              
Segment Reporting Information [Line Items]              
Other adjustments 1   5 1 13    
Group [Member] | Automotive [Member] | Operating Segments [Member]              
Segment Reporting Information [Line Items]              
Net sales and revenue 36,670   38,462 71,034 74,777    
Income (loss) before automotive interest and taxes-adjusted 2,648   1,094 4,519 1,340    
Adjustments (1,110)   (1,286) (1,657) (1,714)    
Total assets 132,198   138,387 132,198 138,387   132,198
Depreciation, amortization and impairment of long lived assets and finite lived intangible assets 1,676   1,620 3,088 3,051    
Group [Member] | Automotive [Member] | Operating Segments [Member] | GMNA [Member]              
Segment Reporting Information [Line Items]              
Net sales and revenue 26,481   25,671 51,157 50,075    
Income (loss) before automotive interest and taxes-adjusted 2,780   1,385 4,962 1,942    
Adjustments (3)   (874) 29 (874)    
Total assets 89,684   97,777 89,684 97,777   89,684
Depreciation, amortization and impairment of long lived assets and finite lived intangible assets 1,033   1,221 2,134 2,313    
Group [Member] | Automotive [Member] | Operating Segments [Member] | GMNA [Member] | Warranty Obligations [Member]              
Segment Reporting Information [Line Items]              
Catch-up Adjustment, Change in Estimate for Recall Campaigns     874   874    
Net insurance recoveries related to flood damage       (29)      
Group [Member] | Automotive [Member] | Operating Segments [Member] | GME [Member]              
Segment Reporting Information [Line Items]              
Net sales and revenue 4,987   5,974 9,436 11,594    
Income (loss) before automotive interest and taxes-adjusted (45)   (305) (284) (589)    
Adjustments (17)   0 (354) 0    
Total assets 11,126   12,289 11,126 12,289   11,126
Depreciation, amortization and impairment of long lived assets and finite lived intangible assets 118   115 239 224    
Group [Member] | Automotive [Member] | Operating Segments [Member] | GME [Member] | Change of Business Model in Russia [Member]              
Segment Reporting Information [Line Items]              
Cost Related to Business Withdrawal 17     354      
Group [Member] | Automotive [Member] | Operating Segments [Member] | GMIO [Member]              
Segment Reporting Information [Line Items]              
Net sales and revenue 3,053   3,602 6,165 6,832    
Income (loss) before automotive interest and taxes-adjusted 349   315 720 567    
Adjustments (295)   (12) (387) (21)    
Total assets 21,081   22,990 21,081 22,990   21,081
Depreciation, amortization and impairment of long lived assets and finite lived intangible assets 415   162 526 276    
Group [Member] | Automotive [Member] | Operating Segments [Member] | GMIO [Member] | Change of Business Model in Russia [Member]              
Segment Reporting Information [Line Items]              
Cost Related to Business Withdrawal       89      
Group [Member] | Automotive [Member] | Operating Segments [Member] | GMIO [Member] | Thailand [Member]              
Segment Reporting Information [Line Items]              
Tangible Asset Impairment Charges 297     297      
Group [Member] | Automotive [Member] | Operating Segments [Member] | GMSA [Member]              
Segment Reporting Information [Line Items]              
Net sales and revenue 2,109   3,177 4,201 6,202    
Income (loss) before automotive interest and taxes-adjusted (144)   (81) (358) (237)    
Adjustments (720)   0 (720) (419)    
Total assets 8,269   11,068 8,269 11,068   8,269
Depreciation, amortization and impairment of long lived assets and finite lived intangible assets 107   104 183 205    
Group [Member] | Automotive [Member] | Operating Segments [Member] | GMSA [Member] | Venezuela [Member]              
Segment Reporting Information [Line Items]              
Tangible Asset Impairment Charges 116     116      
Charge for foreign currency devaluation 604     604 419    
Group [Member] | Automotive [Member] | Corporate [Member]              
Segment Reporting Information [Line Items]              
Net sales and revenue 40   38 75 74    
Income (loss) before automotive interest and taxes-adjusted (292)   (220) (521) (343)    
Adjustments (75)   (400) (225) (400)    
Total assets 21,874   28,458 21,874 28,458   21,874
Depreciation, amortization and impairment of long lived assets and finite lived intangible assets 4   19 8 35    
Group [Member] | Automotive [Member] | Corporate [Member] | Ignition Switch Recall Compensation Program [Member]              
Segment Reporting Information [Line Items]              
Charge related to Ignition Switch Recall Compensation Program 75   400 225 400    
Group [Member] | Automotive [Member] | Eliminations [Member]              
Segment Reporting Information [Line Items]              
Total assets (19,836)   (34,195) (19,836) (34,195)   (19,836)
Depreciation, amortization and impairment of long lived assets and finite lived intangible assets (1)   (1) (2) (2)    
Group [Member] | GM Financial [Member] | Operating Segments [Member] | GM Financial Segment [Member]              
Segment Reporting Information [Line Items]              
Net sales and revenue 1,515   1,191 2,869 2,288    
Income (loss) before automotive interest and taxes-adjusted 225   258 439 479    
Adjustments 0   7 0 8    
Total assets 55,442   42,537 55,442 42,537   55,442
Depreciation, amortization and impairment of long lived assets and finite lived intangible assets 494   199 839 375    
Eliminations [Member]              
Segment Reporting Information [Line Items]              
Net sales and revenue (5)   (4) (11) (8)    
Income (loss) before automotive interest and taxes-adjusted (2)   (1) (5) (2)    
Adjustments 0   0 0 0    
Total assets (1,828)   (1,826) (1,828) (1,826)   $ (1,828)
Depreciation, amortization and impairment of long lived assets and finite lived intangible assets $ 0   $ 0 $ 0 $ 0