Other Expense, Net - (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Other Income and Expenses [Abstract]
Non-service cost components of pension and OPEB costs	$ (4)	$ (3)	$ (19)	$ (10)
Government grants and incentives	3	3	11	8
Foreign exchange loss	(1)	(3)	(11)	(7)
Strategic transaction expenses, net of transaction breakup fee income	(8)	(6)	(32)	(13)
Non-income tax legal judgment			6
Other, net	2		14	3
Other expense, net	$ (8)	$ (9)	$ (31)	$ (19)