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Income Taxes - Schedule of Components of Income Tax Expense (Benefit) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Current:      
Federal $ 2.1 $ 0.2 $ (20.1)
State 0.3 (0.8) (1.3)
Foreign 3.6 (0.2) 1.6
Current Income tax expense (benefit) 6.0 (0.8) (19.8)
Deferred:      
Federal (14.6) 4.7 (2.3)
State (2.6) (0.7) 0.0
Foreign (0.5) 0.6 0.2
Provision for (reversal of) valuation allowance on deferred tax assets 17.3 (3.9) 2.3
Deferred income tax expense (benefit) (0.4) 0.7 0.2
Other 0.0 (0.7) (2.8)
Total $ 5.6 $ (0.8) $ (22.4)