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Employee Benefit Plans - Expected benefit payments (Details)
$ in Thousands
Nov. 24, 2019
USD ($)
Defined Benefit Plan Disclosure [Line Items]  
2019 $ 78,110
2020 77,609
2021 77,753
2022 76,991
2023 77,151
2024-2028 376,605
Pension plans, defined benefit [Member]  
Defined Benefit Plan Disclosure [Line Items]  
2019 68,838
2020 69,039
2021 69,622
2022 69,379
2023 70,185
2024-2028 350,538
Other postretirement benefit plans, defined benefit [Member]  
Defined Benefit Plan Disclosure [Line Items]  
2019 9,272
2020 8,570
2021 8,131
2022 7,612
2023 6,966
2024-2028 $ 26,067