Other Income, Net - Schedule of Other Income, Net (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Other Income and Expenses [Abstract]
Equity loss	$ 15	$ 24	$ 52	$ 68
Interest income	(5)	(4)	(14)	(11)
Foreign currency (gains) losses, net	10	(17)	16	(27)
Net gain from asset sales	(124)	(41)	(152)	(69)
Net income (loss) on mark-to-market derivative contracts (Q)	(4)	16	5	19
Other, net	(9)	7	(27)	(7)
Other (income) expenses, net	$ (117)	$ (15)	$ (120)	$ (27)