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Income Taxes - Tax Provision Summary (Details) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Dec. 31, 2023
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Current provision        
Federal   $ 71.4 $ 47.2 $ 85.0
State   19.5 15.9 18.3
Foreign   46.9 32.0 26.2
Total current   137.8 95.1 129.5
Deferred provision        
Federal   (16.3) 6.3 (7.7)
State   (3.2) 2.0 (2.3)
Foreign   0.3 0.0 (0.5)
Total deferred   (19.2) 8.3 (10.5)
Effective income tax provision $ (4.8) $ 118.6 $ 103.4 $ 119.0