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Income Tax Provision - (Benefit) Provision for Income Taxes (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Current:      
Federal $ 2.6 $ 30.4 $ 0.6
State and local (0.1) 6.1 5.7
Foreign 0.3 0.2 0.8
Total current tax expense (benefit) 2.8 36.7 7.1
Deferred:      
Federal 0.4 (9.2) 24.2
State and local 0.1 (0.5) 0.7
Foreign 0.0 0.0 0.0
Total deferred tax expense (benefit) 0.5 (9.7) 24.9
Provision (benefit) for incomes taxes $ 3.3 $ 27.0 $ 32.0