Other Expenses (Income), Net - Schedule of Other Expenses (Income), Net (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Other Income And Expenses [Abstract]
Equity loss	$ 38	$ 12
Interest income	(4)	(4)
Foreign currency (gains) losses, net	8	(6)
Net gain from asset sales	(27)	(5)
Net loss (gain) on mark-to-market derivative contracts	5	(17)
Other, net	5	(7)
Other (income) expenses, net	$ 25	$ (27)