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Derivative Financial Instruments (Pretax Impact Of Fair Value Hedge Derivative Instruments On The Consolidated Statements of Income) (Details) (Fair Value Hedging [Member], Cost of Sales [Member], USD $)
In Millions, unless otherwise specified
3 Months Ended
Dec. 27, 2014
Dec. 28, 2013
Forward Contracts [Member]
   
Derivative [Line Items]    
Gain/(Loss) on forwards $ (40)us-gaap_DerivativeGainLossOnDerivativeNet
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_ForwardContractsMember
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_FairValueHedgingMember
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_CostOfSalesMember
$ (6)us-gaap_DerivativeGainLossOnDerivativeNet
/ us-gaap_DerivativeInstrumentRiskAxis
= us-gaap_ForwardContractsMember
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_FairValueHedgingMember
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_CostOfSalesMember
Purchase Contracts [Member]
   
Derivative [Line Items]    
Gain/(Loss) on forwards $ 40us-gaap_DerivativeGainLossOnDerivativeNet
/ us-gaap_DerivativeInstrumentRiskAxis
= tsn_PurchaseContractsMember
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_FairValueHedgingMember
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_CostOfSalesMember
$ 6us-gaap_DerivativeGainLossOnDerivativeNet
/ us-gaap_DerivativeInstrumentRiskAxis
= tsn_PurchaseContractsMember
/ us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis
= us-gaap_FairValueHedgingMember
/ us-gaap_IncomeStatementLocationAxis
= us-gaap_CostOfSalesMember