Other Financial Data - Schedule of Other Income (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Other (Expense) Income
Foreign currency remeasurement gain (loss)	$ 3,000,000	$ (20,000,000)	$ 16,000,000	$ (32,000,000)
Gain (loss) on disposal of business	(3,000,000)	0	(4,000,000)	(2,000,000)
Pension and other postretirement income (expense)	0	9,000,000	(5,000,000)	26,000,000
Equity earnings	1,000,000	2,000,000	3,000,000	11,000,000
Gain (loss) on financial instruments	0	16,000,000	(27,000,000)	6,000,000
Other	0	(3,000,000)	0	(3,000,000)
Total	$ 1,000,000	$ 4,000,000	$ (17,000,000)	$ 6,000,000