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Income Taxes - Sources of Income before Income Taxes (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Income Tax Disclosure [Abstract]      
Domestic $ 25.9 $ 90.2 $ 95.2
Foreign 112.2 (49.0) 79.2
Income before income tax expense $ 138.1 $ 41.2 $ 174.4