XML 110 R98.htm IDEA: XBRL DOCUMENT v3.25.4
Defined Benefit Plans - Components of Net Periodic Benefit Cost for Pension and Postretirement Benefits (Detail) - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Dec. 28, 2024
Dec. 27, 2025
Dec. 28, 2024
Dec. 30, 2023
Defined Benefit Plan Disclosure [Line Items]        
Recognition of actuarial loss (gain)   $ 0.0 $ 18.3 $ (0.5)
Settlement loss $ (19.0)      
Net periodic benefit cost (income)   0.7 11.7 (1.6)
Pension Benefits [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Service cost   0.0 0.0  
Interest cost   11.4 22.2  
Recognition of actuarial loss (gain)   (8.8) (23.9)  
Postretirement Benefits [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Service cost   0.1 0.4  
Interest cost   0.3 0.5  
Recognition of actuarial loss (gain)   (0.3) (0.4)  
Net Periodic Benefit Cost [Member] | Pension Benefits [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Service cost   0.0 0.0 0.1
Interest cost   11.4 22.2 27.2
Expected return on plan assets   (10.7) (29.1) (28.6)
Recognition of actuarial loss (gain)   0.0 (0.5) 0.0
Settlement loss   $ 0.0 $ 19.0 $ 2.0
Defined Benefit Plan, Net Periodic Benefit (Cost) Credit, Settlement Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]   Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax
Net periodic benefit cost (income)   $ 0.7 $ 11.6 $ 0.7
Net Periodic Benefit Cost [Member] | Postretirement Benefits [Member]        
Defined Benefit Plan Disclosure [Line Items]        
Service cost   0.1 0.4 0.4
Interest cost   0.3 0.5 0.5
Recognition of actuarial loss (gain)   (0.3) (0.3) (2.6)
Net periodic benefit cost (income)   $ 0.1 $ 0.6 $ (1.7)