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Transactions With Related Parties (Details)
shares in Millions, $ in Millions
1 Months Ended 12 Months Ended
Aug. 31, 2017
USD ($)
Sep. 29, 2018
USD ($)
lease
shares
Sep. 30, 2017
USD ($)
Oct. 01, 2016
USD ($)
Donald J. Tyson Revocable Trust, Berry Street Waste Water Treatment Plant, LP, and the sisters of Mr. Tyson [Member] | Water Plant [Member]        
Related Party Transaction [Line Items]        
Related Party Transaction, Number of Operating Leases | lease   2    
Tyson Family Ownership Percentage   90.00%    
Related Party Transaction, Expenses from Transactions with Related Party   $ 1.0 $ 1.0 $ 1.0
Tyson Limited Partnership [Member] | Class B [Member]        
Related Party Transaction [Line Items]        
Tyson Family Ownership Percentage   99.985%    
Related Party Ownership of Shares Outstanding | shares   70.0    
Tyson Limited Partnership [Member] | Administrative Services [Member]        
Related Party Transaction [Line Items]        
Revenue from Related Parties   $ 0.3    
Tyson Limited Partnership And Tyson Family [Member]        
Related Party Transaction [Line Items]        
Related Party Voting Rights Percentage   70.96%    
Tyson Limited Partnership And Tyson Family [Member] | Class A [Member]        
Related Party Transaction [Line Items]        
Tyson Family Ownership Percentage   2.09%    
Related Party Ownership of Shares Outstanding | shares   6.2    
Donald Smith and John Randal Tyson [Member] | Buchan, Ltd [Member]        
Related Party Transaction [Line Items]        
Related Party Transaction, Amounts of Transaction $ 5.0      
Equity Method Investment, Ownership Percentage 17.50%      
Due from Joint Ventures, Current   $ 9.0