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Acquisitions And Divestitures Acquisition of PureDepth, Inc. (Details) - USD ($) $ in Millions		12 Months Ended
	Mar. 23, 2016	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Business Acquisition [Line Items]
Purchase price, cash consideration, net of cash acquired		$ 1,197	$ 324	$ 15
Goodwill		$ 2,524	$ 1,944	$ 1,502
PureDepth, Inc.
Business Acquisition [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired	100.00%
Purchase price, cash consideration, net of cash acquired	$ 15
Intangible assets	10
Goodwill	5
Total purchase price allocation	$ 15

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