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Income Taxes - Schedule of Components of Income Tax Expense (Benefit) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Income Taxes [Line Items]      
Current Federal Tax Expense (Benefit) $ 62.0 $ 46.1 $ 250.8
Current State and Local Tax Expense (Benefit) 0.8 (2.2) 28.8
Current Income Tax Expense (Benefit) 62.8 43.9 279.6
Deferred Federal Income Tax Expense (Benefit) 8.0 18.1 (110.8)
Deferred State and Local Income Tax Expense (Benefit) 8.3 (5.8) (45.2)
Deferred Income Tax Expense (Benefit) 16.3 12.3 (156.0)
Income Tax Expense 79.1 56.2 123.6
Og and E [Member]      
Income Taxes [Line Items]      
Current Federal Tax Expense (Benefit) 72.7 48.9 (141.2)
Current State and Local Tax Expense (Benefit) 3.0 3.7 (0.9)
Current Income Tax Expense (Benefit) 75.7 52.6 (142.1)
Deferred Federal Income Tax Expense (Benefit) 9.0 18.8 219.9
Deferred State and Local Income Tax Expense (Benefit) 8.5 (2.6) (1.4)
Deferred Income Tax Expense (Benefit) 17.5 16.2 218.5
Income Tax Expense $ 93.2 $ 68.8 $ 76.4