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Segment Reporting Segment Reporting (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Dec. 27, 2014
Segments
Dec. 28, 2013
Sep. 27, 2014
Segment Reporting Information [Line Items]      
Number of Operating Segments 5us-gaap_NumberOfOperatingSegments    
Sales $ 10,817us-gaap_SalesRevenueNet $ 8,761us-gaap_SalesRevenueNet  
Segment Reconciling Items [Member]      
Segment Reporting Information [Line Items]      
Business Combination, Acquisition Related Costs 15us-gaap_BusinessCombinationAcquisitionRelatedCosts
/ us-gaap_ConsolidationItemsAxis
= us-gaap_MaterialReconcilingItemsMember
   
Sales 0us-gaap_SalesRevenueNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_MaterialReconcilingItemsMember
0us-gaap_SalesRevenueNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_MaterialReconcilingItemsMember
 
Intersegment Elimination [Member]      
Segment Reporting Information [Line Items]      
Sales (332)us-gaap_SalesRevenueNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_IntersegmentEliminationMember
(287)us-gaap_SalesRevenueNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_IntersegmentEliminationMember
 
Intersegment Elimination [Member] | Chicken [Member]      
Segment Reporting Information [Line Items]      
Sales 1us-gaap_SalesRevenueNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_IntersegmentEliminationMember
/ us-gaap_StatementBusinessSegmentsAxis
= tsn_ChickenMember
2us-gaap_SalesRevenueNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_IntersegmentEliminationMember
/ us-gaap_StatementBusinessSegmentsAxis
= tsn_ChickenMember
 
Intersegment Elimination [Member] | Beef [Member]      
Segment Reporting Information [Line Items]      
Sales 78us-gaap_SalesRevenueNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_IntersegmentEliminationMember
/ us-gaap_StatementBusinessSegmentsAxis
= tsn_BeefMember
63us-gaap_SalesRevenueNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_IntersegmentEliminationMember
/ us-gaap_StatementBusinessSegmentsAxis
= tsn_BeefMember
 
Intersegment Elimination [Member] | Pork [Member]      
Segment Reporting Information [Line Items]      
Sales 253us-gaap_SalesRevenueNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_IntersegmentEliminationMember
/ us-gaap_StatementBusinessSegmentsAxis
= tsn_PorkMember
222us-gaap_SalesRevenueNet
/ us-gaap_ConsolidationItemsAxis
= us-gaap_IntersegmentEliminationMember
/ us-gaap_StatementBusinessSegmentsAxis
= tsn_PorkMember
 
Chicken Production Operations in Brazil and Mexico [Member] | International [Member]      
Segment Reporting Information [Line Items]      
Disposal Group, Consideration     $ 575us-gaap_DisposalGroupIncludingDiscontinuedOperationConsideration
/ us-gaap_IncomeStatementBalanceSheetAndAdditionalDisclosuresByDisposalGroupsIncludingDiscontinuedOperationsAxis
= tsn_ChickenProductionOperationsinBrazilandMexicoMember
/ us-gaap_StatementBusinessSegmentsAxis
= tsn_InternationalMember