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Acquisitions And Divestitures Technology Investments (Details) - USD ($) $ in Millions | 9 Months Ended |
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2017 | Dec. 31, 2017
Business Acquisition [Line Items] |  |  |
Other Long-term Investments | $ 0 | $ 50 |
Other Long-term Investments, Carrying Value | 56 |  | $ 56
Quanergy | Advanced Safety and User Experience |  |  |
Business Acquisition [Line Items] |  |  |
Other Long-term Investments, Carrying Value | 6 |  |
Innoviz Technologies | Advanced Safety and User Experience |  |  |
Business Acquisition [Line Items] |  |  |
Other Long-term Investments |  | 15 |
Other Long-term Investments, Carrying Value | 15 |  |
Leddartech | Advanced Safety and User Experience |  |  |
Business Acquisition [Line Items] |  |  |
Other Long-term Investments |  | 10 |
Other Long-term Investments, Carrying Value | 10 |  |
Otonomo | Advanced Safety and User Experience |  |  |
Business Acquisition [Line Items] |  |  |
Other Long-term Investments |  | 15 |
Other Long-term Investments, Carrying Value | 15 |  |
Valens Semiconductor | Signal and Power Solutions |  |  |
Business Acquisition [Line Items] |  |  |
Other Long-term Investments |  | $ 10 |
Other Long-term Investments, Carrying Value | $ 10 |  |

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