Income (Loss) from Continuing Operations Before Income Taxes (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Schedule of Components of Income Before Income Tax Expense (Benefit) [Line Items]
U.S. income (loss)	$ 2	$ (39)	$ (174)
Foreign income	42	28	16
Total	$ 44	$ (11)	$ (158)