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Income Taxes (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2023
Jun. 30, 2023
Sep. 30, 2022
Jun. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Income Before Income Taxes $ 52.6   $ (32.4)   $ 139.3 $ (75.5)
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount 11.1   (6.8)   29.3 (15.9)
Effective Income Tax Rate Reconciliation, Interim Adjustment, Amount (0.2)   (2.3)   (0.5) (3.8)
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount 4.2   12.6   4.7 28.5
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount 2.3   0.1   6.7 (0.1)
Effective Income Tax Rate Reconciliation, Discrete Adjustments, Amount 1.2 $ 2.3 (0.6) $ 4.5 3.3 4.7
Income tax provision $ 16.2   $ 4.2   $ 36.9 $ 4.0
Effective Income Tax Rate Reconciliation, Percent 30.80%   (13.00%)   26.50% (5.30%)
Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations   2.1   3.8    
Effective Income Tax Rate Reconciliation, Discrete Adjustments, Amount $ 1.2 $ 2.3 $ (0.6) $ 4.5 $ 3.3 $ 4.7