v3.26.3
Income Taxes (Income Tax Reconciliation and Unrecognized Tax Benefits) (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2026
Mar. 31, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Dec. 31, 2025
Effective Income Tax Rate Reconciliation, Amount [Abstract]            
Income before income taxes and equity in net income (loss) of unconsolidated entities $ 152.4   $ 123.1 $ 441.2 $ 348.1  
Equity in investments of unconsolidated entities 1.5   (0.1) 0.5 (3.9)  
Total 153.9   123.0 441.7 344.2  
Income tax expense $ 38.4   $ 31.4 $ 111.3 $ 85.1  
Effective income tax rate 25.00%   25.50% 25.20%    
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued [Abstract]            
Total Liability For Unrecognized Tax Benefits $ 15.4     $ 15.4   $ 13.1
Concentration Risk [Line Items]            
Effective Income Tax Rate Reconciliation, Increase (Decrease) From Prior Year, PercentTaxes (0.50%)     50.00%    
Unrecognized Tax Benefits $ 14.0     $ 14.0   12.3
Total Liability For Unrecognized Tax Benefits 15.4     15.4   $ 13.1
Effective tax rate         24.7  
Deferred Tax Liabilities, Undistributed Foreign Earnings 1.4     1.4    
Undistributed Earnings of Foreign Subsidiaries $ 91.0     $ 91.0    
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   81.00%   87.00%