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Income Taxes Income Taxes - Components of Income (Loss) Before Income Taxes (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Income Tax Disclosure [Abstract]      
Loss from continuing operations before income taxes, domestic $ (0.3) $ (76.5) $ (49.6)
Income (loss) before income taxes (6.1) 64.3 10.9
Income from continuing operations before income taxes, foreign $ 6.4 $ 12.2 $ 38.7