Segment and Geographic Data (Summary of Revenue and Property, Plant and Equipment by Geographical Location) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	$ 1,095	$ 897	$ 932	$ 847	$ 994	$ 902	$ 920	$ 837	$ 3,771	$ 3,653	$ 3,916
Property, plant and equipment	616				439				616	439	461
United States
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									1,574	1,490	1,477
Property, plant and equipment	255				168				255	168	180
Europe
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									1,195	1,179	1,379
Property, plant and equipment	237				189				237	189	206
Asia Pacific
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									518	482	478
Property, plant and equipment	87				56				87	56	53
Other
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue									484	502	582
Property, plant and equipment	$ 37				$ 26				$ 37	$ 26	$ 22