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Fair Value Measurement (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Jul. 01, 2023
Sep. 30, 2023
Oct. 01, 2022
Oct. 02, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Goodwill, Impairment Loss $ 448 $ 781 $ 0 $ 0
Chicken Reporting Unit        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Goodwill, Impairment Loss 210 210    
International Reporting Unit        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Goodwill, Impairment Loss $ 238 238    
Beef Reporting Unit        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Goodwill, Impairment Loss   $ 333    
Wal Mart Stores Inc Member | Accounts Receivable | Customer Concentration Risk        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Concentration Risk, Percentage   15.90% 16.40%  
Other income/expense        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Other Nonrecurring Gain     $ 37  
Maximum        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Short Term Investment Maturity Period   12 months    
Available For Sale Securities Debt Maturity Period   46 years    
Maximum | Accounts Receivable | Customer Concentration Risk        
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]        
Concentration Risk, Percentage   10.00% 10.00%