Intangible Assets and Goodwill (Carrying Amount of Goodwill) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Goodwill Activity
Aggregate goodwill	$ 420,000,000	$ 383,000,000
Accumulated impairment losses	0	0
Goodwill	728,000,000	420,000,000	$ 383,000,000
Goodwill acquired	337,000,000	37,000,000
Foreign currency translation	(29,000,000)
Aggregate goodwill	728,000,000	420,000,000	383,000,000
Accumulated impairment losses	0	0	0
Impairment of goodwill	0	0	0
Products
Goodwill Activity
Aggregate goodwill	270,000,000	264,000,000
Accumulated impairment losses	0	0
Goodwill	316,000,000	270,000,000	264,000,000
Goodwill acquired	46,000,000	6,000,000
Foreign currency translation	0
Aggregate goodwill	316,000,000	270,000,000	264,000,000
Accumulated impairment losses	0	0	0
Services
Goodwill Activity
Aggregate goodwill	150,000,000	119,000,000
Accumulated impairment losses	0	0
Goodwill	412,000,000	150,000,000	119,000,000
Goodwill acquired	291,000,000	31,000,000
Foreign currency translation	(29,000,000)
Aggregate goodwill	412,000,000	150,000,000	119,000,000
Accumulated impairment losses	$ 0	$ 0	$ 0