v3.25.2
Income Taxes (Income Tax Reconciliation and Unrecognized Tax Benefits) (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Dec. 31, 2024
Effective Income Tax Rate Reconciliation, Amount [Abstract]          
Income before income taxes and equity in net income (loss) of unconsolidated entities $ 116.5 $ 89.5 $ 225.0 $ 176.5  
Equity in investments of unconsolidated entities (1.2) (1.2) (3.8) (2.7)  
Total 115.3 88.3 221.2 173.8  
Income tax expense $ 26.3 $ 19.2 $ 53.7 $ 40.5  
Effective income tax rate 22.80% 21.70% 24.30%    
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued [Abstract]          
Current liability $ 0.1   $ 0.1   $ 0.1
Non-current liability 13.1   13.1   11.7
Total liability for unrecognized tax benefits $ 13.2   $ 13.2   11.8
Concentration Risk [Line Items]          
Effective Income Tax Rate Reconciliation, Increase (Decrease) From Prior Year, PercentTaxes 1.10%   1.00%    
Unrecognized Tax Benefits $ 12.3   $ 12.3   11.1
Total Liability For Unrecognized Tax Benefits $ 13.2   $ 13.2   11.8
Effective tax rate       23.3  
Undistributed Earnings of Foreign Subsidiaries not Permanently Reinvested         142.0
Deferred Tax Liabilities, Undistributed Foreign Earnings         $ 7.1
Geographic Concentration Risk | Cash, Cash Equivalents and Investments | Total International          
Concentration Risk [Line Items]          
Percentage of cash, cash equivalents and investments held by operations outside of US     83.00%