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Pensions And Other Postretirement Benefits (Multiemployer Plans) (Details)
$ in Millions
12 Months Ended
Oct. 02, 2021
USD ($)
plan
Oct. 03, 2020
USD ($)
Sep. 28, 2019
USD ($)
Multiemployer Plan [Line Items]      
Multiemployer Plan, Number of Plans 1    
Pension Plan [Member]      
Multiemployer Plan [Line Items]      
Multiemployer Plan, Employer Contribution, Cost | $ $ 1 $ 1  
Defined Benefit Plan, Number of Plans | plan 4    
Pension Plan [Member] | Defined Benefit Plan, Unfunded Plan [Member] | Nonqualified Plan [Member]      
Multiemployer Plan [Line Items]      
Defined Benefit Plan, Number of Plans | plan 3    
Pension Plan [Member] | Bakery and Confectionary Union & Industry International Pension Fund [Member]      
Multiemployer Plan [Line Items]      
Multiemployer Plan, Employer Contribution, Cost | $ $ 1 $ 1 $ 1
Surcharge Imposed 10.00%    
Multiemployer Plans, Collective-Bargaining Arrangement, Expiration Date (Deprecated 2020-01-31) Aug. 02, 2024