Restructuring Charges/Other - Restructuring Reserve (Details) $ in Millions	6 Months Ended
	Jun. 30, 2017 USD ($)
Restructuring And Related Activities [Abstract]
Balance, December 31, 2016	$ 40
Restructuring charges	7
Payments	(10)
Non-cash items	(1)	[1]
Balance, June 30, 2017	$ 36

[1] Reflects charges for impacts of accelerated depreciation and changes in exchange rates.