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Supplementary Quarterly Financial Information (Unaudited) (Details) - USD ($) $ / shares in Units, $ in Millions |  | 3 Months Ended | 6 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | --- | ---
Oct. 31, 2017 | Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jun. 30, 2017 | Mar. 31, 2017 | Jun. 30, 2018 | Dec. 31, 2017 | Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Total net sales and revenue |  | $ 38,399 | $ 35,791 | $ 36,760 | $ 36,099 | $ 37,715 | $ 33,623 | $ 36,984 | $ 37,266 |  |  | $ 147,049 | $ 145,588 | $ 149,184
Income (loss) from continuing operations |  | 2,069 | 2,530 | 2,366 | 1,110 | (4,903) | 114 | 2,433 | 2,686 |  |  | 8,075 | 330 | 9,269
Loss from discontinued operations, net of tax |  | 0 | 0 | 0 | 70 | 277 | 3,096 | 770 | 69 |  |  | 70 | 4,212 | 1
Net income (loss) attributable to stockholders |  | $ 2,044 | $ 2,534 | $ 2,390 | $ 1,046 | $ (5,151) | $ (2,981) | $ 1,660 | $ 2,608 |  |  | $ 8,014 | $ (3,864) | $ 9,427
Basic earnings (loss) per common share – continuing operations (in dollars per share) |  | $ 1.42 | $ 1.77 | $ 1.68 | $ 0.78 | $ (3.46) | $ 0.08 | $ 1.62 | $ 1.78 |  |  | $ 5.66 | $ 0.23 | $ 6.12
Basic loss per common share – discontinued operations (in dollars per share) |  | (0.00) | (0.00) | (0.00) | 0.05 | 0.19 | 2.14 | 0.51 | 0.05 |  |  | 0.05 | 2.88 | (0.00)
Diluted earnings (loss) per common share – continuing operations (in dollars per share) |  | 1.40 | 1.75 | 1.66 | 0.77 | (3.46) | 0.08 | 1.60 | 1.75 |  |  | 5.58 | 0.22 | 6.00
Diluted loss per common share – discontinued operations (in dollars per share) |  | $ (0.00) | $ (0.00) | $ (0.00) | $ 0.05 | $ 0.19 | $ 2.11 | $ 0.51 | $ 0.05 |  |  | $ 0.05 | $ 2.82 | $ (0.00)
Non-recurring tax benefit |  |  |  |  |  |  |  |  |  |  |  | $ 134 | $ (7,194) | $ (147)
Tax expense related to tax reform legislation |  |  |  |  |  | $ 7,300 |  |  |  |  |  |  | $ 7,300 |
Automotive [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Automotive and other gross margin(a) |  | $ 2,935 | $ 3,743 | $ 3,204 | $ 2,507 | $ 4,385 | $ 3,614 | $ 4,463 | $ 4,758 |  |  |  |  |
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 |  |  |
Facility closing [Member] | Korea [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring charges and other charges |  |  |  |  |  |  |  |  |  | $ 1,100 |  |  |  |
Ignition Switch Recall Litigations [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Ignition switch related legal matters |  |  | $ 440 |  |  |  |  |  |  |  |  |  |  |
Transformation Activities [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Restructuring charges and other charges |  | 1,300 |  |  |  |  |  |  |  |  |  |  |  |
Foreign Tax Authority [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Non-recurring tax benefit |  | $ 1,000 |  |  |  |  |  |  |  |  |  |  |  |

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