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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
Jul. 01, 2023
Jul. 02, 2022
Jul. 01, 2023
Jul. 02, 2022
Retirement Benefits [Abstract]        
Service cost pertaining to benefits earned during the period $ 0.8 $ 1.4 $ 1.6 $ 2.7
Interest cost on projected benefit obligations 4.5 3.3 8.9 6.6
Expected return on pension assets (4.7) (5.2) (9.3) (10.3)
Net amortization loss (0.2) 2.8 (0.4) 5.6
Net pension expense $ 0.4 $ 2.3 $ 0.8 $ 4.6