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Income Taxes - Sources of Income before Income Taxes (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Income Tax Disclosure [Abstract]      
Domestic $ 90.2 $ 95.2 $ 106.3
Foreign (49.0) 79.2 78.3
Income before income tax expense $ 41.2 $ 174.4 $ 184.6