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Supplementary Quarterly Financial Information (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Millions |  | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Oct. 31, 2017 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2017 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Total net sales and revenue |  | $ 37,715 | $ 33,623 | $ 36,984 | $ 37,266 | $ 39,896 | $ 38,889 | $ 37,383 | $ 33,016 |  | $ 145,588 | $ 149,184 | $ 135,725
Income (loss) from continuing operations |  | (4,903) | 114 | 2,433 | 2,686 | 1,895 | 2,707 | 2,744 | 1,923 |  | 330 | 9,269 | 9,590
(Loss) from discontinued operations, net of tax |  | (277) | (3,096) | (770) | (69) | (120) | 5 | 106 | 8 |  | (4,212) | (1) | 25
Net income (loss) attributable to stockholders |  | $ (5,151) | $ (2,981) | $ 1,660 | $ 2,608 | $ 1,835 | $ 2,773 | $ 2,866 | $ 1,953 |  | $ (3,864) | $ 9,427 | $ 9,687
Basic earnings (loss) per common share – continuing operations (in dollars per share) |  | $ (3.46) | $ 0.08 | $ 1.62 | $ 1.78 | $ 1.29 | $ 1.79 | $ 1.78 | $ 1.25 |  | $ 0.23 | $ 6.12 | $ 6.09
Basic (loss) per common share – discontinued operations (in dollars per share) |  | (0.19) | (2.14) | (0.51) | (0.05) | (0.08) | 0.00 | 0.07 | 0.01 |  | (2.88) | 0.00 | 0.02
Diluted earnings (loss) per common share – continuing operations (in dollars per share) |  | (3.46) | 0.08 | 1.60 | 1.75 | 1.27 | 1.76 | 1.74 | 1.23 |  | 0.22 | 6.00 | 5.89
Diluted earnings (loss) per common share – discontinued operations (in dollars per share) |  | $ (0.19) | $ (2.11) | $ (0.51) | $ (0.05) | $ (0.08) | $ 0.00 | $ 0.07 | $ 0.01 |  | $ (2.82) | $ 0.00 | $ 0.02
Tax expense related to tax reform legislation |  | $ 7,300 |  |  |  |  |  |  |  |  | $ 7,300 |  |
Automotive [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
Automotive gross margin |  | $ 4,758 | $ 3,955 | $ 4,786 | $ 5,081 | $ 4,605 | $ 5,391 | $ 5,305 | $ 4,405 |  |  |  |
Discontinued Operations [Member] | Opel/Vauxhall Business [Member] |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |
(Loss) from discontinued operations, net of tax |  |  |  |  |  |  |  |  |  | $ (3,900) |  |  |
Charge at closing |  |  |  |  |  |  |  |  |  | 6,200 |  |  |
Income tax expense | $ 2,300 |  |  |  |  |  |  |  |  | $ 2,300 |  |  |

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