Current Other Liabilities (Details) - USD ($) $ in Millions	Mar. 31, 2018	Dec. 31, 2017
Other Liabilities, Current [Abstract]
Asset retirement obligations	$ 11	$ 19
Benefit obligations (Note 11)	30	30
Customer rebates	46	65
Derivatives (Note 16)	3	3
Environmental (Note 12)	18	14
Insurance	4	5
Interest	25	17
Restructuring (Note 14)	4	5
Salaries and benefits	65	113
Sales and use tax/foreign withholding tax payable	19	16
Other	41	67
Total	$ 266	$ 354