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Postretirement and Postemployment Benefits - Future Benefit Payments (Details)
$ in Thousands
Sep. 25, 2022
USD ($)
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]  
2023, gross payments $ 14,668
2024, gross payments 14,830
2025, gross payments 14,947
2026, gross payments 15,126
2027, gross payments 15,204
2028-2032, gross payments 75,362
Other Postretirement Benefits Plan  
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]  
2023, gross payments 980
2023, subsidy 0
2023, net payments 980
2024, gross payments 991
2024, subsidy 0
2024, net payments 991
2025, gross payments 985
2025, subsidy 0
2025, net payments 985
2026, gross payments 987
2026, subsidy 0
2026, net payments 987
2027, gross payments 955
2027, subsidy 0
2027, net payments 955
2028-2032, gross payments 4,563
2028-2032, subsidy 0
2028-2032, net payments $ 4,563