Noncurrent Other Liabilities (Details) (USD $) In Millions, unless otherwise specified	Mar. 31, 2014	Dec. 31, 2013
Other Liabilities, Noncurrent [Abstract]
Environmental (Note 12)	$ 66	$ 67
Insurance	53	50
Deferred revenue	27	28
Deferred proceeds	53	53
Asset retirement obligations	17	18
Derivatives (Note 16)	2	3
Restructuring (Note 14)	1	2
Income taxes payable	20	20
Other	54	46
Total	$ 293	$ 287