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Derivative Financial Instruments (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
6 Months Ended
Mar. 28, 2015
Derivative [Line Items]  
Maximum length of time hedged forecasted transactions, months 18 months
Maximum Length Of Time Hedged Undesignated Positions 18 months
Grain [Member]  
Derivative [Line Items]  
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months (2)us-gaap_CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths
/ us-gaap_DerivativeInstrumentRiskAxis
= tsn_GrainMember