Intangible Assets and Goodwill - Carrying Amount of Goodwill (Details) $ in Millions	6 Months Ended
	Jul. 01, 2017 USD ($)
Goodwill Activity
Goodwill, net of impairment losses	$ 728
Goodwill acquired	7
Purchase accounting adjustments	4
Foreign currency	10
Goodwill, net of impairment losses	749
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	7
Purchase accounting adjustments	3
Foreign currency	10
Goodwill, net of impairment losses	$ 432