Results of Discontinued Operations (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
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sales	$ 8	$ 12	$ 34	$ 36
Cost of sales	7	13	30	37
Restructuring expense	1	2	3	5
Other expense, net		2	1	3
Pre-tax loss		(5)		(9)
Income tax benefit		1		2
Loss from discontinued operations		$ (4)		$ (7)