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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. 30, 2023
Dec. 31, 2022
Dec. 31, 2021
Defined Benefit Plan Disclosure [Line Items]      
Recognition of actuarial gains $ 0.5 $ 1.2 $ (0.8)
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 (income) cost $ (1.6) $ (8.7) $ (7.1)
Pension Benefits [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Service cost 0.1 0.2  
Interest cost 27.2 20.4  
Recognition of actuarial gains 0.5 155.9  
Postretirement Benefits [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Service cost 0.4 0.4  
Interest cost 0.5 0.4  
Recognition of actuarial gains 1.3 1.2  
Net Periodic Benefit Cost | Pension Benefits [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Service cost 0.1 0.2 0.4
Interest cost 27.2 20.4 19.3
Expected return on plan assets (28.6) (28.1) (27.4)
Recognition of actuarial gains 0.0 (0.3) 1.1
Settlement loss 2.0 0.0  
Net periodic benefit (income) cost 0.7 (7.8) (6.6)
Net Periodic Benefit Cost | Postretirement Benefits [Member]      
Defined Benefit Plan Disclosure [Line Items]      
Service cost 0.4 0.4 0.2
Interest cost 0.5 0.4 0.2
Recognition of actuarial gains (2.6) (1.0) (0.5)
Net periodic benefit (income) cost $ (1.7) $ (0.2) $ (0.1)