Long-term Debt (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Debt Instrument [Line Items]
Carrying Value	$ 855
Senior Notes 6.50 Percent Due 2019
Debt Instrument [Line Items]
Carrying Value	400
Fair Value	407
Senior Notes 6.75 Percent Due 2021
Debt Instrument [Line Items]
Carrying Value	350
Fair Value	358
Term Loan Facility Initial Draw
Debt Instrument [Line Items]
Carrying Value		867
Fair Value		873
Discount On Term Loan Facility
Debt Instrument [Line Items]
Carrying Value		(39)
Term Loan Facility
Debt Instrument [Line Items]
Carrying Value		828
Fair Value		873
Debt, Other
Debt Instrument [Line Items]
Carrying Value	105	91
Fair Value	103	85
Current and long-term debt
Debt Instrument [Line Items]
Carrying Value	855	919
Fair Value	868	958
Long Term Debt Current
Debt Instrument [Line Items]
Carrying Value	24	139
Fair Value	24	139
Long Term Debt Noncurrent
Debt Instrument [Line Items]
Carrying Value	831	780
Fair Value	$ 844	$ 819