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Goodwill and Other Identifiable Intangible Assets - Estimated Future Amortization Expense for Identifiable Intangible Assets (Detail)
$ in Millions
Jun. 30, 2016
USD ($)
Finite-Lived Intangible Assets [Line Items]  
Q3-Q4 2016 $ 75.3
2017 149.8
2018 148.3
2019 145.9
2020 139.1
2021 $ 134.0