Other (Income) Expenses, Net - Schedule of Other Income, Net (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Component of Other Income, Nonoperating [Line Items]
Equity loss (income)	$ 28	$ (15)	$ (14)
Interest income	(31)	(20)	(19)
Foreign currency (gains) losses, net	(5)	16	13
Net gain from asset sales	(321)	(41)	(9)
Net (gain) loss on mark-to-market derivative contracts	(13)	(52)	37
Other, net	1	25	(3)
Other (income) expenses, net	$ (341)	$ (87)	$ 5