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Retirement Benefits (Tables)
 9 Months Ended
Sep. 28, 2025
Retirement Benefits [Abstract]  
Schedule Of Defined Benefit Plans Disclosures
For the quarters ended September 28, 2025 and September 29, 2024, the components of pension and other postretirement benefit expense for the Company’s defined benefit plans included the following (in millions): 
Pension BenefitsOther Postretirement Benefits
Quarter endedQuarter ended
 September 28, 2025September 29, 2024September 28, 2025September 29, 2024
Service cost - benefits earned during the year$1.3 $1.5 $0.1 $0.2 
Interest cost on benefits earned in prior years4.4 4.1 2.5 2.5 
Expected return on plan assets(4.0)(4.1)— — 
Amortization of prior service cost (credit)0.1 0.1 (0.3)(0.2)
Amortization of net actuarial loss— — 1.2 1.3 
Total retirement benefit expense$1.8 $1.6 $3.5 $3.8 
For the year-to-date periods ended September 28, 2025 and September 29, 2024, the components of pension and other postretirement benefit expense for the Company’s defined benefit plans included the following (in millions): 
Pension BenefitsOther Postretirement Benefits
Year-to-date period endedYear-to-date period ended
 September 28, 2025September 29, 2024September 28, 2025September 29, 2024
Service cost - benefits earned during the year$4.0 $4.4 $0.3 $0.4 
Interest cost on benefits earned in prior years13.0 12.3 7.4 7.6 
Expected return on plan assets(11.9)(12.3)— — 
Amortization of prior service cost (credit)0.3 0.2 (0.7)(0.6)
Amortization of net actuarial loss— — 3.8 3.9 
Total retirement benefit expense$5.4 $4.6 $10.8 $11.3