Other Income (Expense), Net (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Other Income and Expenses [Abstract]
Equity income from investments in Trinidad	$ 4	$ 9	$ 8
Adjustment to deferred compensation expense	(11)	6
Interest income		3
Net Foreign Currency Transaction Gains (Losses)	$ (41)	$ (17)	(34)
Losses on sales of warehouse stock			$ (15)