Other Expenses (Income), Net - Schedule of Other Expenses (Income), Net (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Other Income and Expenses [Abstract]
Equity loss	$ 16	$ 18	$ 84	$ 40
Interest income	(3)	(3)	(13)	(11)
Foreign currency gains, net	(5)	(4)		(15)
Net gain from asset sales	(15)	(1)	(44)	(7)
Net loss (gain) on mark-to-market derivative contracts	20	(17)	17	(18)
Other, net	10		9	(4)
Other (income) expenses, net	$ 23	$ (7)	$ 53	$ (15)