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Fair Value Measurements (Schedule Of Available For Sale Securities) (Details) (USD $) In Millions, unless otherwise specified	Dec. 27, 2014		Sep. 27, 2014
U.S. Treasury and Agency [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unrealized Gain/(Loss)	$ 1us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainLossBeforeTax / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_USTreasuryAndGovernmentMember		$ 0us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainLossBeforeTax / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_USTreasuryAndGovernmentMember
Amortized Cost Basis	29us-gaap_AvailableForSaleSecuritiesAmortizedCost / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_USTreasuryAndGovernmentMember		25us-gaap_AvailableForSaleSecuritiesAmortizedCost / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_USTreasuryAndGovernmentMember
Fair Value	30us-gaap_AvailableForSaleSecurities / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_USTreasuryAndGovernmentMember		25us-gaap_AvailableForSaleSecurities / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = us-gaap_USTreasuryAndGovernmentMember
Corporate And Asset-Backed [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unrealized Gain/(Loss)	0us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainLossBeforeTax / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = tsn_CorporateAndAssetBackedMember		2us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainLossBeforeTax / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = tsn_CorporateAndAssetBackedMember
Amortized Cost Basis	65us-gaap_AvailableForSaleSecuritiesAmortizedCost / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = tsn_CorporateAndAssetBackedMember		65us-gaap_AvailableForSaleSecuritiesAmortizedCost / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = tsn_CorporateAndAssetBackedMember
Fair Value	65us-gaap_AvailableForSaleSecurities / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = tsn_CorporateAndAssetBackedMember		67us-gaap_AvailableForSaleSecurities / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = tsn_CorporateAndAssetBackedMember
Common Stock and Warrants [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Unrealized Gain/(Loss)	16us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainLossBeforeTax / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = tsn_CommonStockAndWarrantsMember		0us-gaap_AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainLossBeforeTax / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = tsn_CommonStockAndWarrantsMember
Amortized Cost Basis	1us-gaap_AvailableForSaleSecuritiesAmortizedCost / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = tsn_CommonStockAndWarrantsMember	[1]	1us-gaap_AvailableForSaleSecuritiesAmortizedCost / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = tsn_CommonStockAndWarrantsMember	[1]
Fair Value	17us-gaap_AvailableForSaleSecurities / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = tsn_CommonStockAndWarrantsMember		1us-gaap_AvailableForSaleSecurities / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = tsn_CommonStockAndWarrantsMember
Cumulative Other-than-Temporary Impairment Loss	$ 2tsn_CumulativeOtherthanTemporaryImpairmentLoss / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = tsn_CommonStockAndWarrantsMember		$ 2tsn_CumulativeOtherthanTemporaryImpairmentLoss / us-gaap_MajorTypesOfDebtAndEquitySecuritiesAxis = tsn_CommonStockAndWarrantsMember
[1] At December 27, 2014 and September 27, 2014, the amortized cost basis for Equity Securities had been reduced by accumulated other than temporary impairment of approximately $2 million.

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Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 25

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Amount before tax of unrealized gain (loss) in accumulated other comprehensive income (AOCI) on investments in debt and equity securities classified as available-for-sale.

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This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.2)

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