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Pension and Other Postretirement Plans - Schedule of Net Amounts Recognized for the Direct Plans in Consolidated Balance Sheets (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 25, 2022
--- | --- | ---
Defined Benefit Plan Disclosure [Line Items] |  |
Noncurrent liabilities | $ (7.9) | $ (12.2)
Pension Benefits |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Current liabilities | (0.1) | (0.1)
Noncurrent liabilities | (4.4) | (9.4)
Net amount recognized | (4.5) | (9.5)
Postretirement Benefits |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Current liabilities | (0.6) | (0.4)
Noncurrent liabilities | (3.5) | (2.8)
Net amount recognized | $ (4.1) | $ (3.2)

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