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Employee Future Benefits (Overall Pension Obligation) (Details)
$ in Thousands
Dec. 29, 2019
USD ($)
Retirement Benefits [Abstract]  
Estimated actuarial net losses that will be amortized from AOCL in the next fiscal year $ 1,000
Defined Benefit Plan, Expected Future Benefit Payment [Abstract]  
2020 5,356
2021 5,632
2022 5,753
2023 5,867
2024 5,975
2025 through 2029 30,620
Expected future benefit payments 59,203
Expected contributions to the plans in the next fiscal year $ 5,800