Other Expense, Net - (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Other Income and Expenses [Abstract]
Non-service cost components of pension and OPEB costs	$ (6)	$ (3)
Government grants and incentives	3	2
Foreign exchange loss	(11)	(2)
Strategic transaction expenses, net of transaction breakup fee income	(13)	1
Non-income tax legal judgment	6
Other, net	8	2
Other expense, net	$ (13)	$ 0