Changes in Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net Unamortized Gain (Loss) Arising During Period, Net of Tax	$ (1)	$ 0	$ 4
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	(23)	(88)	(61)
Changes in Accumulated Other Comprehensive Income [Roll Forward]
Accumulated Other Comprehensive Income (Loss), Net of Tax	(15)	73
Other comprehensive income before reclassifications, net of tax	(24)	(88)
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, before Reclassification Adjustments, Net of Tax		0
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ (39)	(15)	73
Pension Plan, Defined Benefit [Member]
Changes in Accumulated Other Comprehensive Income [Roll Forward]
Accumulated Other Comprehensive Income (Loss), Net of Tax		4
Accumulated Other Comprehensive Income (Loss), Net of Tax			4
Foreign Currency Translation Gains Losses [Member]
Changes in Accumulated Other Comprehensive Income [Roll Forward]
Accumulated Other Comprehensive Income (Loss), Net of Tax		$ 69
Accumulated Other Comprehensive Income (Loss), Net of Tax			$ 69