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INCOME TAXES - United States and International Components of Income before Income Taxes (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Income Tax Disclosure [Abstract]      
United States $ (9.6) $ 381.1 $ 378.8
Foreign (98.3) (53.0) 32.1
Income Before Income Taxes $ (107.9) $ 328.1 $ 410.9