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Goodwill And Other Intangible Assets (Goodwill Activity) (Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Sep. 27, 2014
Sep. 28, 2013
Sep. 29, 2012
Goodwill [Roll Forward]      
Goodwill, beginning of period $ 2,491 $ 2,480  
Accumulated impairment losses (594) (589) (589)
Goodwill, net 6,706 1,902 1,891
Goodwill acquired 4,827 12  
Reclass to assets held for sale (16)    
Impairment losses (5) 0  
Currency translation and other (2) (1)  
Goodwill, end of period 7,300 2,491  
Chicken [Member]
      
Goodwill [Roll Forward]      
Goodwill, beginning of period 908 909  
Accumulated impairment losses 0 0 0
Goodwill, net 907 908 909
Goodwill acquired 0 0  
Reclass to assets held for sale 0    
Impairment losses 0 0  
Currency translation and other (1) (1)  
Goodwill, end of period 907 908  
Beef [Member]
      
Goodwill [Roll Forward]      
Goodwill, beginning of period 1,123 1,123  
Accumulated impairment losses (560) (560) (560)
Goodwill, net 563 563 563
Goodwill acquired 0 0  
Reclass to assets held for sale 0    
Impairment losses 0 0  
Currency translation and other 0 0  
Goodwill, end of period 1,123 1,123  
Pork [Member]
      
Goodwill [Roll Forward]      
Goodwill, beginning of period 317 317  
Accumulated impairment losses 0 0 0
Goodwill, net 317 317 317
Goodwill acquired 0 0  
Reclass to assets held for sale 0    
Impairment losses 0 0  
Currency translation and other 0 0  
Goodwill, end of period 317 317  
Prepared Foods [Member]
      
Goodwill [Roll Forward]      
Goodwill, beginning of period 75 63  
Accumulated impairment losses 0 0 0
Goodwill, net 92 75 63
Goodwill acquired 18 12  
Reclass to assets held for sale 0    
Impairment losses 0 0  
Currency translation and other (1) 0  
Goodwill, end of period 92 75  
International [Member]
      
Goodwill [Roll Forward]      
Goodwill, beginning of period 68 68  
Accumulated impairment losses (34) (29) (29)
Goodwill, net 23 39 39
Goodwill acquired 5 0  
Impairment losses (5) 0  
Currency translation and other 0 0  
Goodwill, end of period 57 68  
Unallocated Goodwill [Member]
      
Goodwill [Roll Forward]      
Goodwill, beginning of period 0 0  
Accumulated impairment losses 0 0 0
Goodwill, net 4,804 0 0
Goodwill acquired 4,804 0  
Reclass to assets held for sale 0    
Impairment losses 0 0  
Currency translation and other 0 0  
Goodwill, end of period 4,804 0  
Chicken Production Operations in Brazil and Mexico [Member] | International [Member]
      
Goodwill [Roll Forward]      
Reclass to assets held for sale $ (16)