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Income Taxes (Schedule of Reconciliation of the U.S. Federal Statutory Rate to Effective Tax Rate) (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Income Tax Disclosure [Abstract]        
Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount $ 35.4 $ 24.8 $ 72.1 $ 54.5
Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount 3.2 4.2 6.7 8.2
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Amortization, Amount 1.0 1.2 (0.2) 2.7
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-Based Payment Arrangement, Amount (2.1) 0.1 (1.9) 0.2
Effective Income Tax Rate Reconciliation, Tax Credit, Research, Amount (4.8) 0.0 (4.8) 0.0
Effective Income Tax Rate Reconciliation, Other Adjustments, Amount 0.0 0.1 0.0 0.2
Provision for income taxes $ 32.7 $ 30.4 $ 71.9 $ 65.8
U.S. federal statutory rate 21.00% 21.00% 21.00% 21.00%
State income taxes 1.90% 3.60% 2.00% 3.20%
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Amortization, Percent 0.60% 1.00% (0.10%) 1.00%
Excess tax benefits from stock-based compensation plans (1.20%) 0.10% (0.60%) 0.10%
Effective Income Tax Rate Reconciliation, Tax Credit, Research, Percent (2.90%) 0.00% (1.40%) 0.00%
Other 0.00% 0.10% 0.00% 0.10%
Effective tax rate 19.40% 25.80% 20.90% 25.40%