Intangible Assets and Goodwill (Carrying Amount of Goodwill) (Details) - USD ($) $ in Millions	9 Months Ended
	Oct. 03, 2015	Dec. 31, 2014
Goodwill Activity
Aggregate goodwill	$ 423	$ 383
Accumulated impairment losses	0	0
Goodwill, net of impairment losses	423	383
Goodwill acquired	39
Purchase accounting adjustments	1
Products
Goodwill Activity
Aggregate goodwill	272	264
Accumulated impairment losses	0	0
Goodwill, net of impairment losses	272	264
Goodwill acquired	7
Purchase accounting adjustments	1
Services
Goodwill Activity
Aggregate goodwill	151	119
Accumulated impairment losses	0	0
Goodwill, net of impairment losses	151	$ 119
Goodwill acquired	32
Purchase accounting adjustments	$ 0