Acquisitions And Divestitures Acquisition of PureDepth, Inc. (Details) - USD ($) $ in Millions		12 Months Ended
	Mar. 23, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Business Acquisition [Line Items]
Purchase price, cash consideration, net of cash acquired		$ 15	$ 1,654	$ 345
Goodwill		$ 1,508	$ 1,539	$ 656
PureDepth, Inc.
Business Acquisition [Line Items]
Business Acquisition, Percentage of Equity Interests Acquired	100.00%
Purchase price, cash consideration, net of cash acquired	$ 15
Intangible assets	10
Goodwill	5
Total purchase price allocation	$ 15