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Income Taxes - Income (Loss) Before Income Taxes and Non-controlling Interests (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Income Tax Disclosure [Abstract]      
United States $ (181.2) $ (308.2) $ (181.8)
Foreign 357.8 584.8 936.8
Income before income taxes $ 176.6 $ 276.6 $ 755.0