Other Financial Data - Property, Plant And Equipment, Net (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 01, 2017	Jul. 02, 2016	Jul. 01, 2017	Jul. 02, 2016	Dec. 31, 2016
Property, Plant and Equipment, Net [Abstract]
Land	$ 10		$ 10		$ 12
Building	267		267		306
Machinery and equipment	2,078		2,078		1,921
Property, plant and equipment, gross	2,355		2,355		2,239
Less accumulated depreciation	(1,496)		(1,496)		(1,450)
Property, plant and equipment, net	859		859		$ 789
Depreciation expense	$ 49	$ 44	$ 93	$ 92