Other Expense, Net - (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Other Income and Expenses [Abstract]
Non-service cost components of pension and OPEB costs	$ (9)	$ (4)	$ (15)	$ (7)
Government grants and incentives	5	3	8	5
Foreign exchange loss	1	(2)	(10)	(4)
Strategic transaction expenses, net of transaction breakup fee income	(11)	(8)	(24)	(7)
Non-income tax legal judgment			6
Other, net	4	1	12	3
Other expense, net	$ (10)	$ (10)	$ (23)	$ (10)