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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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-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
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