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Income Taxes - Income Tax Expense (Benefit) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Current:      
Federal $ 19.1 $ 28.7 $ 17.1
Foreign 7.9 8.5 7.9
State 3.6 4.0 3.8
Total current 30.6 41.2 28.8
Deferred:      
Federal (1.8) (8.7) (6.3)
Foreign (7.7) (17.3) (8.5)
State 0.0 (0.9) (0.8)
Total deferred (9.5) (26.9) (15.6)
Total:      
Federal 17.3 20.0 10.8
Foreign 0.2 (8.8) (0.6)
State 3.6 3.1 3.0
Total income tax expense $ 21.1 $ 14.3 $ 13.2