Other Expenses (Income), Net - Schedule of Other (Income) Expenses, Net (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Other Income and Expenses [Abstract]
Equity loss	$ 89	$ 92	$ 68
Interest income	(16)	(19)	(13)
Foreign currency losses (gains), net		1	(33)
Net gain from asset sales	(74)	(47)	(10)
Net loss (gain) on mark-to-market derivative contracts (X)	23	15	(29)
Other, net	(20)	5	(8)
Other (income) expenses, net	$ 2	$ 47	$ (25)