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Retirement Plans (Summary of Net Pension and Supplemental Executive Retirement Plan Expense Recognized) (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 29, 2024
Jul. 01, 2023
Jun. 29, 2024
Jul. 01, 2023
Retirement Benefits [Abstract]        
Service cost pertaining to benefits earned during the period $ 0.7 $ 0.8 $ 1.4 $ 1.6
Interest cost on projected benefit obligations 4.5 4.5 8.9 8.9
Expected return on pension assets (4.9) (4.7) (9.8) (9.3)
Net amortization loss (0.4) (0.2) (0.8) (0.4)
Net pension expense (income) $ (0.1) $ 0.4 $ (0.3) $ 0.8