Other (Income) Expenses, Net - Schedule of Other Income, Net (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Component of Other Income, Nonoperating [Line Items]
Equity loss (income)	$ 4	$ 2	$ 16	$ (24)
Interest income	(6)	(5)	(16)	(16)
Foreign currency (gains)losses, net	(3)	35	(4)	5
Net (gain) loss from asset sales	(1)			1
Net loss (gain) on mark-to-market derivative contracts (N)	4	(14)	13	(41)
Other, net		13	(5)	28
Other (income) expenses, net (H)	$ (2)	$ 31	$ 4	$ (47)