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Income Taxes - Sources of Income before Income Taxes (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Income Tax Disclosure [Abstract]      
Domestic $ 106.3 $ 53.2 $ (0.7)
Foreign 78.3 81.2 40.4
Income before income tax expense $ 184.6 $ 134.4 $ 39.7