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
Dec. 31, 2012
Dec. 31, 2011
Expected Amortization Expense [Line Items]    
2013 $ 106.3  
2014 93.7  
2015 88.7  
2016 83.3  
2017 73.5  
Thereafter 542.2  
Net $ 987.7 $ 550.2