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Pension and Other Postretirement Plans - Schedule of Plan Assets By Category (Details) - Pension Benefits - USD ($)
$ in Millions
Dec. 31, 2023
Dec. 25, 2022
Dec. 26, 2021
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan, plan assets, amount $ 131.1 $ 119.4 $ 166.2
Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan, plan assets, amount 131.1 119.4  
Group Annuity | Fair Value, Recurring | Fair Value, Inputs, Level 3      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan, plan assets, amount 0.0 0.0 $ 4.8
Cash and cash equivalents | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan, plan assets, amount 23.2 5.4  
Equity | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan, plan assets, amount 28.5 31.0  
Fixed income | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan, plan assets, amount 73.6 76.6  
Multi-strategy hedge funds | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan, plan assets, amount 3.0 3.4  
Real estate | Fair Value, Recurring      
Defined Benefit Plan Disclosure [Line Items]      
Defined benefit plan, plan assets, amount $ 2.8 $ 3.0