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Property, Plant And Equipment (Details) (USD $)
In Millions, unless otherwise specified
Dec. 27, 2014
Sep. 27, 2014
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross $ 10,575us-gaap_PropertyPlantAndEquipmentGross $ 10,381us-gaap_PropertyPlantAndEquipmentGross
Less accumulated depreciation 5,364us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment 5,251us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment
Net property, plant and equipment 5,211us-gaap_PropertyPlantAndEquipmentNet 5,130us-gaap_PropertyPlantAndEquipmentNet
Land [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross 126us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LandMember
126us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_LandMember
Buildings And Leasehold Improvements [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross 3,558us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= tsn_BuildingsAndLeaseholdImprovementsMember
3,501us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= tsn_BuildingsAndLeaseholdImprovementsMember
Machinery And Equipment [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross 6,204us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_MachineryAndEquipmentMember
6,144us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_MachineryAndEquipmentMember
Land Improvements And Other [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross 278us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= tsn_LandImprovementsAndOtherMember
276us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= tsn_LandImprovementsAndOtherMember
Buildings And Equipment Under Construction [Member]    
Property, Plant and Equipment [Line Items]    
Property, plant and equipment, gross $ 409us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_ConstructionInProgressMember
$ 334us-gaap_PropertyPlantAndEquipmentGross
/ us-gaap_PropertyPlantAndEquipmentByTypeAxis
= us-gaap_ConstructionInProgressMember