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Income Taxes - Components of Provision for Income Tax Expense (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Current:      
Federal $ 111.0 $ 101.7 $ 58.7
State and other 28.5 26.6 13.5
Total current expense 139.5 128.3 72.2
Deferred:      
Federal 8.6 (0.7) 17.9
State and other 2.1 4.6 10.0
Total deferred expense 10.7 3.9 27.9
Total income tax expense related to continuing operations $ 150.2 $ 132.2 $ 100.1