Changes in Accumulated Other Comprehensive Income Level 4 (Details) - Summary of Changes in Accumulated Other Comprehensive Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016	Dec. 31, 2015
Changes in Accumulated Other Comprehensive Income [Roll Forward]
Beginning Balance	$ (39)	$ (15)
Other comprehensive income before reclassifications, net of tax	6	26
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Gain (Loss) Arising During Period, Net of Tax		26
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Tax	3	4	$ 3	$ 4
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, before Reclassification Adjustments, Net of Tax		0
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, Net of Tax	0
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax	6	26
Other Comprehensive Income (Loss), Net of Tax	6	26
Ending Balance	(33)	11
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax	$ (36)	$ 7	$ (42)	$ (19)