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GOODWILL AND OTHER INTANGIBLE ASSETS - Estimated Amortization Expense (Detail)
$ in Millions
Dec. 31, 2017
USD ($)
Goodwill And Intangible Assets Disclosure [Abstract]  
2018 $ 127.9
2019 127.8
2020 127.0
2021 126.6
2022 $ 126.2