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Pensions And Other Postretirement Benefits (Multiemployer Plans) (Details)
$ in Thousands
12 Months Ended
Oct. 03, 2020
USD ($)
Sep. 28, 2019
USD ($)
Sep. 29, 2018
USD ($)
Multiemployer Plan [Line Items]      
Multiemployer Plan, Number of Plans 3    
Pension Plan [Member]      
Multiemployer Plan [Line Items]      
Multiemployer Plan, Employer Contribution, Cost $ 1,000 $ 2,000  
Pension Plan [Member] | Bakery and Confectionary Union & Industry International Pension Fund [Member]      
Multiemployer Plan [Line Items]      
Multiemployer Plan, Employer Contribution, Cost $ 1,000 1,000 $ 2,000
Surcharge Imposed 10.00%    
Multiemployer Plans, Collective-Bargaining Arrangement, Expiration Date (Deprecated 2020-01-31) [1] Oct. 10, 2015    
Pension Plan [Member] | Pension Fund of Local 227 [Member]      
Multiemployer Plan [Line Items]      
Multiemployer Plan, Employer Contribution, Cost $ 0 200  
Multiemployer Plans, Collective-Bargaining Arrangement, Expiration Date (Deprecated 2020-01-31) [1] Nov. 08, 2023    
Pension Plan [Member] | Retail, Wholesale and Department Store International Union and Industry Pension Fund [Member]      
Multiemployer Plan [Line Items]      
Multiemployer Plan, Employer Contribution, Cost $ 0 $ 500  
Surcharge Imposed 9.00%    
Multiemployer Plans, Collective-Bargaining Arrangement, Expiration Date (Deprecated 2020-01-31) [1] Nov. 07, 2021    
[1]
Renewal negotiations for the Bakery and Confectionery Union and Industry International Pension Fund are in progress.