Other Expenses (Income), Net - Schedule of Other Expenses (Income), Net (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Other Income And Expenses [Abstract]
Equity loss	$ 30	$ 10	$ 68	$ 22
Interest income	(6)	(4)	(10)	(8)
Foreign currency (gains) losses, net	(3)	(5)	5	(11)
Net gain from asset sales	(2)	(1)	(29)	(6)
Net (gain) loss on mark-to-market derivative contracts	(8)	16	(3)	(1)
Other, net	(6)	3	(1)	(4)
Other (income) expenses, net	$ 5	$ 19	$ 30	$ (8)