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Income Taxes - Components of Income Before Income Taxes (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Income Tax Disclosure [Abstract]      
U.S. $ 28.5 $ 29.1 $ 60.0
Foreign 44.6 68.2 36.9
Income before income taxes and income from equity affiliates $ 73.1 $ 97.3 $ 96.9