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Acquisitions and Dispositions Acquisitions Pro Forma Information (Details) - AdvancePierre [Member]
$ / shares in Units, $ in Millions
12 Months Ended
Sep. 30, 2017
USD ($)
$ / shares
Business Acquisition [Line Items]  
Pro forma sales $ 39,330
Pro forma net income attributable to Tyson $ 1,837
Pro forma net income per diluted share attributable to Tyson | $ / shares $ 4.97