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Goodwill and Other Intangible Assets, Net - Estimated Amortization Expense Related to Intangible Assets (Detail)
$ in Millions
Dec. 31, 2016
USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]  
2017 $ 18.1
2018 16.7
2019 16.6
2020 16.5
2021 16.4
Thereafter $ 49.3