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Earnings Per Share (Narrative) (Details)
In Millions, unless otherwise specified
3 Months Ended
Dec. 27, 2014
Dec. 28, 2013
Earnings Per Share, Basic and Diluted [Line Items]    
Number Of Classes Of Common Stock 2tsn_NumberOfClassesOfCommonStock  
Percentage amount of per share cash dividends paid to holders of Class B stock that cannot exceed paid to holders of Class A stock 90.00%tsn_CashDividendsPaidRatioToOtherClassOfStockMaximum  
Class A [Member]    
Earnings Per Share, Basic and Diluted [Line Items]    
Undistributed earnings (losses), ratio used to calculate allocation to class of stock 1tsn_UndistributedEarningsLossesRatioUsedToCalculateAllocationToClassOfStock
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassAMember
 
Class B [Member]    
Earnings Per Share, Basic and Diluted [Line Items]    
Undistributed earnings (losses), ratio used to calculate allocation to class of stock 0.9tsn_UndistributedEarningsLossesRatioUsedToCalculateAllocationToClassOfStock
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CommonClassBMember
 
Stock Compensation Plan [Member]    
Earnings Per Share, Basic and Diluted [Line Items]    
Antidilutive securities excluded from computation of earnings per share, shares 6us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= us-gaap_StockCompensationPlanMember
5us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
/ us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis
= us-gaap_StockCompensationPlanMember