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Retirement Plans (Summary of Net Pension and Supplemental Executive Retirement Plan Expense Recognized) (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 27, 2025
Sep. 28, 2024
Sep. 27, 2025
Sep. 28, 2024
Retirement Benefits [Abstract]        
Service cost pertaining to benefits earned during the period $ 0.5 $ 0.7 $ 1.5 $ 2.1
Interest cost on projected benefit obligations 4.3 4.5 12.7 13.4
Expected return on pension assets (4.5) (4.9) (13.4) (14.7)
Defined Benefit Plan, Amortization of Gain (Loss) (0.5) (0.5) (1.3) (1.3)
Net pension income $ (0.2) $ (0.2) $ (0.5) $ (0.5)