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Income Taxes - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Income Before Income Taxes $ (13.2) $ 90.0 $ 3.6 $ 166.9
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount (2.8) 18.9 0.7 35.0
Effective Income Tax Rate Reconciliation, Interim Adjustment, Amount 3.8 0.2 4.3 0.4
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount 0.2 4.4 4.1 9.7
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount (0.4) 3.8 (0.2) 7.2
Effective Income Tax Rate Reconciliation, Discrete Adjustments, Amount 0.6 1.2 0.6 1.1
Income tax provision 0.2 $ 26.1 8.3 $ 51.2
Effective Income Tax Rate Reconciliation, Percent   29.00%   30.70%
Effective Income Tax Rate Reconciliation, Discrete Adjustments, Amount $ 0.6 $ 1.2 $ 0.6 $ 1.1