Noncurrent Other Liabilities (Details) - USD ($) $ in Millions	Mar. 31, 2017	Dec. 31, 2016
Other Liabilities, Noncurrent [Abstract]
Asset retirement obligations	$ 10	$ 20
Deferred proceeds	41	41
Deferred revenue	9	9
Environmental (Note 11)	50	50
Income taxes payable	6	6
Insurance	48	46
Restructuring Reserve, Noncurrent	20	0
Other	53	43
Total	$ 237	$ 215