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v3.20.4

Pension, Retiree Medical and Savings Plans (Level 3 Assets) (Details) | 12 Months Ended |
--- | --- | ---
Dec. 26, 2020 | Dec. 28, 2019
Change in fair value of plan assets |  |
Minimum Real estate notice period | 45 days |
Corporate Bonds |  |
Change in fair value of plan assets |  |
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Percentage | 30.00% | 28.00%

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