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INCOME TAXES - United States and International Components of Loss before Income Taxes (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Income Tax Disclosure [Abstract]      
United States $ 65.6 $ (150.5) $ (189.1)
Foreign (121.6) (212.3) (86.3)
Total loss before income taxes $ (56.0) $ (362.8) $ (275.4)