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Goodwill and Identifiable Intangible Assets - Remaining Estimated Future Amortization Expense (Detail) (USD $)
In Millions, unless otherwise specified
Jun. 30, 2014
Goodwill And Intangible Assets Disclosure [Abstract]  
2014 $ 53.3
2015 88.7
2016 84.8
2017 79.3
2018 70.2
Thereafter 333.8
Total $ 710.1