Annual report pursuant to Section 13 and 15(d)

Estimated Future Amortization Expense (Detail)

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Estimated Future Amortization Expense (Detail) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Expected Amortization Expense [Line Items]  
2012 $ 85.9
2013 68.3
2014 56.0
2015 51.7
2016 38.9
Thereafter 249.4
Finite-Lived Intangible Assets, Future Amortization Expense, Total $ 550.2