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Acquisition and Dispositions Acquisition (Narrative) (Details) - USD ($)
$ / shares in Units, $ in Millions
9 Months Ended
Jun. 07, 2017
Jul. 01, 2017
Jul. 02, 2016
Oct. 01, 2016
Business Acquisition [Line Items]        
Goodwill   $ 9,264   $ 6,669
AdvancePierre [Member]        
Business Acquisition [Line Items]        
Business Combination, Consideration Transferred, Per Share of Common Stock $ 40.25      
Business Combination, Consideration Transferred $ 3,200      
Goodwill $ 2,922      
AdvancePierre [Member] | Acquisition-related Costs [Member]        
Business Acquisition [Line Items]        
Business acquisition, Pro Forma Information, Transaction Related Expenses Incurred by Acquiree included in Pro Forma Results     $ 84  
Business acquisition, Pro Forma Information, Transaction Related Expenses Incurred Included in Pro Forma Results     $ 53  
AdvancePierre [Member] | Fair Value Adjustment to Inventory [Member]        
Business Acquisition [Line Items]        
Business Combination, Fair Inventory Inventory Adjustment   $ 36