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Goodwill and Identifiable Intangible Assets - Remaining Estimated Future Amortization Expense (Detail) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2014
Goodwill And Intangible Assets Disclosure [Abstract]  
2014 $ 83.1
2015 88.6
2016 84.4
2017 79.2
2018 70.1
Thereafter 333.7
Total $ 739.1