Provision (Benefit) for Income Taxes for Continuing Operations (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Reconciliation of Provision of Income Taxes [Line Items]
Current Federal	$ 3	$ 1
Current State	1	1	1
Current Foreign	10	8	4
Current Income Tax Expense (Benefit), Total	14	10	5
Deferred Federal	11	(11)	(31)
Deferred State	1	(2)	(6)
Deferred Foreign	5	2	1
Deferred income taxes	17	(11)	(36)
Income tax provision (benefit) - continuing operations	$ 31	$ (1)	$ (31)