Other (Income) Expenses, Net - Schedule of Other (Income) Expenses, Net (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Other Income and Expenses [Abstract]
Equity loss	$ 24	$ 16	$ 68	$ 84
Interest income	(4)	(3)	(11)	(13)
Foreign currency gains, net	(17)	(5)	(27)
Net gain from asset sales	(41)	(15)	(69)	(44)
Net loss on mark-to-market derivative contracts (N)	16	20	19	17
Other, net	7	10	(7)	9
Other (income) expenses, net	$ (15)	$ 23	$ (27)	$ 53