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Pensions And Other Postretirement Benefits (Multiemployer Plans) (Details) - Multiemployer Plans, Pension [Member] - USD ($)
$ in Thousands
 12 Months Ended
Sep. 28, 2019
Sep. 29, 2018
Sep. 30, 2017
Multiemployer Plans [Line Items]      
Multiemployer plan, contributions $ 2,000    
Bakery and Confectionary Union & Industry International Pension Fund [Member]      
Multiemployer Plans [Line Items]      
Multiemployer plan, contributions $ 1,000 $ 2,000 $ 2,000
Surcharge Imposed 10.00%    
Multiemployer Plans, Collective-Bargaining Arrangement, Expiration Date [1] Oct. 10, 2015    
Pension Fund of Local 227 [Member]      
Multiemployer Plans [Line Items]      
Multiemployer plan, contributions [2] $ 200    
Multiemployer Plans, Collective-Bargaining Arrangement, Expiration Date [1] Nov. 09, 2019    
Retail, Wholesale and Department Store International Union and Industry Pension Fund [Member]      
Multiemployer Plans [Line Items]      
Multiemployer plan, contributions [3] $ 500    
Surcharge Imposed 9.00%    
Multiemployer Plans, Collective-Bargaining Arrangement, Expiration Date [1] Nov. 07, 2021    
[1]
Renewal negotiations for the Bakery and Confectionery Union and Industry International Pension Fund are in progress.
[2]
Contributions in fiscal 2019 exceeded 5% of plan contributions for the plan year ended October 31, 2018.
[3]
Contributions in fiscal 2019 exceeded 5% of plan contributions for the plan year ended December 31, 2018.