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Acquisitions and Dispositions Acquisitions Pro Forma Information (Details) - Hillshire Brands Company [Member] - USD ($) $ / shares in Units, $ in Millions | 12 Months Ended
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Sep. 27, 2014 | Sep. 28, 2013
Business Acquisition [Line Items] |  |
Pro forma sales | $ 41,311 | $ 38,195
Pro forma net income from continuing operations attributable to Tyson | $ 1,047 | $ 655
Pro forma net income per diluted share from continuing operations attributable to Tyson (in dollars per share) | $ 2.50 | $ 1.52

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