Supplemental Cash Flow Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Supplemental Cash Flow Information [Abstract]
Interest paid, net of amounts capitalized	$ 130	$ 120	$ 146
Taxes paid, net of refunds	129	151	199
Noncash Investing and Financing Activities
Accrued capital expenditures	1	(37)	3
Asset retirement obligations	2	3	4
Capital expenditure reimbursement	0	0	4
Capital lease obligations	0	6	22
Contingent consideration (Note 4)	0	0	8
Distribution to noncontrolling interest (Note 5)	0	(4)	0
Mitsui reimbursement	$ 0	$ 0	$ 70