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Equity In Net Assets of Nonconsolidated Affiliates (Details) - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2018 | Mar. 31, 2017 | Dec. 31, 2017
Schedule of Equity Method Investments [Line Items] |  |  |
Equity income | $ 648 | $ 555 |
Equity Method Investee [Member] |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Undistributed earnings | 2,800 |  | $ 2,200
Automotive China JVs equity income [Member] |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Equity income | $ 597 | 504 |
Change in ownership percentage | 0.00% |  |
Equity Method Investment, Summarized Financial Information, Revenue | $ 13,719 | 11,201 |
Equity Method Investment, Summarized Financial Information, Net Income (Loss) | 1,177 | 1,046 |
Other joint ventures equity income [Member] |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Equity income | $ 51 | $ 51 |

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