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Goodwill and Other Intangible Assets, Net - Estimated Future Amortization Expense of Definite Life Intangible Assets (Detail)
$ in Millions
Mar. 31, 2018
USD ($)
Goodwill And Intangible Assets Disclosure [Abstract]  
2018 $ 21.7
2019 28.0
2020 21.6
2021 18.8
2022 14.3
2023 and thereafter 110.8
Total $ 215.2