Discontinued Operations - Results of Discontinued Operations (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
Discontinued Operations and Disposal Groups [Abstract]
Sales	$ 0	$ 13
Cost of sales		11
Restructuring expense	1	1
Other income (expense), net	3	(2)
Pre-tax income (loss)	2	(1)
Income tax expense		0
Income (loss) from discontinued operations	$ 2	$ (1)