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Discontinued Operations Narrative (Details) - USD ($) $ in Millions |  |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | --- | ---
Oct. 31, 2017 | Jul. 31, 2017 | Sep. 30, 2018 | Sep. 30, 2017 | Jun. 30, 2017 | Sep. 30, 2018 | Sep. 30, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Loss from discontinued operations, net of tax |  |  | $ 0 | $ 3,096 |  | $ 70 | $ 3,935
Discontinued Operations [Member] | Opel/Vauxhall Business and Fincos [Member] |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Charge at closing | $ 6,200 |  |  |  |  |  |
Loss from discontinued operations, net of tax |  |  | 0 | 3,096 |  | 70 | 3,935
Income tax expense (benefit) |  |  | 0 | 1,756 |  | 0 | 1,385
Other expense items |  |  | 0 | 74 |  | 0 | 72
Disposal loss |  |  |  | 3,100 |  |  | $ 3,700
Discontinued Operations [Member] | Opel/Vauxhall Business [Member] |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Net consideration for transferred business |  | $ 1,400 |  |  |  |  |
Cash received from sale |  | 1,100 |  |  |  |  |
Warrants received |  | 808 |  |  |  |  |
De-risking premium payment |  | $ 478 |  | 478 |  |  |
Payment to PSA Group at closing for assumed underfunded pension liabilities |  |  | 3,400 |  |  |  |
Charge at closing |  |  |  | 5,400 |  |  |
Loss from discontinued operations, net of tax |  |  |  | 3,100 |  |  |
Income tax expense (benefit) |  |  |  | $ 2,300 |  |  |
Other expense items |  |  |  |  | $ 421 |  |
Total net sales and revenue transactions with discontinued operations |  |  | 339 |  |  | 1,500 |
Purchases and expenses with discontinued operations |  |  | $ 297 |  |  | 1,100 |
Discontinued Operations [Member] | Opel/Vauxhall Business [Member] | Discontinued Operations [Member] |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Cash payments used in operating activities |  |  |  |  |  | 1,500 |
Cash receipts provided by operating activities |  |  |  |  |  | $ 1,900 |
Discontinued Operations [Member] | Fincos [Member] |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |
Disposal loss |  |  |  |  | $ 324 |  |

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