Other Operating Expenses - Summary of Other Operating Expenses (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Other Income and Expenses [Abstract]
Restructuring, net	$ 16	$ 24	$ 39	$ 45
Asset impairment	6	0	6	0
Deal integration costs	5	0	5	0
Other	2	0	1	0
Other operating expenses	$ 29	$ 24	$ 51	$ 45