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Equity In Net Assets Of Nonconsolidated Affiliates Transactions with NCAs (Details) - Nonconsolidated Affiliates [Member] - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Related Party Transactions [Line Items] |  |  |
Automotive sales and revenue | $ 406 | $ 923 | $ 889
Automotive purchases, net | 1,155 | 674 | 803
Dividends received | 2,022 | 2,000 | 2,120
Operating cash flows | 657 | 2,321 | $ 2,512
Accounts and notes receivable, net | 979 | 780 |
Accounts payable | 163 | 534 |
Undistributed earnings | $ 2,331 | $ 2,184 |

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