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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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Amount of funded (unfunded) status of defined benefit plan, measured as difference between fair value of plan assets and benefit obligation. Includes, but is not limited to, overfunded (underfunded) status.

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Amount of liability, recognized in statement of financial position, for defined benefit pension and other postretirement plans, classified as current.

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Amount of liability, recognized in statement of financial position, for defined benefit pension and other postretirement plans, classified as noncurrent.

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