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Defined Benefit Plans - Components of Net Periodic Benefit Cost for Pension and Postretirement Benefits (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 28, 2024
Dec. 30, 2023
Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items]      
Recognition of actuarial loss (gain) $ 18.3 $ (0.5) $ (1.2)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Excluding Service Cost, 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) $ 11.7 $ (1.6) $ (8.7)
Pension Benefits [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Service cost 0.0 0.1  
Interest cost 22.2 27.2  
Recognition of actuarial loss (gain) (23.9) (0.5)  
Postretirement Benefits [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Service cost 0.4 0.4  
Interest cost 0.5 0.5  
Recognition of actuarial loss (gain) (0.4) (1.3)  
Net Periodic Benefit Cost [Member] | Pension Benefits [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Service cost 0.0 0.1 0.2
Interest cost 22.2 27.2 20.4
Expected return on plan assets (29.1) (28.6) (28.1)
Recognition of actuarial loss (gain) (0.5) 0.0 (0.3)
Settlement loss 19.0 2.0 0.0
Net periodic benefit cost (income) 11.6 0.7 (7.8)
Net Periodic Benefit Cost [Member] | Postretirement Benefits [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Service cost 0.4 0.4 0.4
Interest cost 0.5 0.5 0.4
Recognition of actuarial loss (gain) (0.3) (2.6) (1.0)
Net periodic benefit cost (income) $ 0.6 $ (1.7) $ (0.2)