Annual report [Section 13 and 15(d), not S-K Item 405]

Income Taxes - Summary of Components of Income Tax Expense (Benefit) (Details)

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Income Taxes - Summary of Components of Income Tax Expense (Benefit) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Current income taxes:      
Federal $ 0.0 $ (1.1) $ 1.7
State 3.7 2.2 3.7
Total current 3.7 1.1 5.4
Deferred income taxes:      
Federal (9.6)   3.6
State (1.1) 0.1 0.1
Total deferred (10.7) 0.1 3.7
Income tax expense (benefit) $ (7.0) $ 1.2 $ 9.1