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Income Taxes - Components of Loss Income Before Income Taxes and Noncontrolling Interests (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Income Tax Disclosure [Abstract]      
Domestic operations $ 576.8 $ 438.2 $ 456.7
Foreign operations 154.0 137.1 80.3
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest $ 730.8 $ 575.3 $ 537.0