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Income Taxes - Effective Tax Rate Reconciliation (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Effective Tax Rate Reconciliation      
Income tax expense at U.S. statutory rate $ 66.8 $ 12.2 $ 20.8
State income taxes, net of federal tax benefit 6.8 3.1 1.5
Foreign withholding taxes 2.4 6.3 0.2
U.S. taxation of international operations (6.1) 18.7 1.4
Effective tax rate differential of earnings outside of United States 10.7 2.8 1.7
Change in valuation allowance 3.0 (2.0) (11.6)
Research & experimentation (2.2) (2.0) (2.9)
Provision to return (8.4) 0.8 5.0
Non-deductible items (0.8) 0.1 0.4
Change in uncertain tax positions 3.7 2.0 (0.3)
Share-based compensation 2.1 0.1 (1.1)
Capital loss 0.0 (40.5) 0.0
Unremitted earnings not permanently reinvested 0.5 0.9 0.0
Other items 0.1 0.5 0.8
Income tax expense $ 78.6 $ 3.0 $ 15.9