Intangible Assets and Goodwill - Carrying Amount of Goodwill (Details) $ in Millions	3 Months Ended
	Apr. 01, 2017 USD ($)
Goodwill Activity
Goodwill, net of impairment losses	$ 728
Goodwill acquired	3
Purchase accounting adjustments	2
Foreign currency	4
Goodwill, net of impairment losses	737
Products
Goodwill Activity
Goodwill, net of impairment losses	316
Goodwill acquired	0
Purchase accounting adjustments	1
Foreign currency	0
Goodwill, net of impairment losses	317
Services
Goodwill Activity
Goodwill, net of impairment losses	412
Goodwill acquired	3
Purchase accounting adjustments	1
Foreign currency	4
Goodwill, net of impairment losses	$ 420