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Fair Value Measurement (Narrative) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jul. 01, 2017 | Jul. 02, 2016 | Jul. 01, 2017 | Jul. 02, 2016 | Oct. 01, 2016
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Other than Temporary Impairments, Recognized in Earnings | $ 0 | $ 0 | $ 0 | $ 0 |
Other than Temporary Impairment Losses, Deferred in OCI |  |  | 0 |  | $ 0
Liabilities, Fair Value Disclosure, Nonrecurring |  | 0 |  | 0 |
Assets, Fair Value Disclosure, Nonrecurring |  | $ 0 |  | $ 0 |
San Diego Prepared Foods operation [Member] | Prepared Foods [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Asset Impairment Charges |  |  | 52 |  |
Property, Plant and Equipment Impairment |  |  | 43 |  |
Impairment of Intangible Assets, Finite-lived |  |  | 8 |  |
Other Asset Impairment Charges |  |  | 1 |  |
San Diego Prepared Foods operation [Member] | Prepared Foods [Member] | Cost of Sales [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Asset Impairment Charges |  |  | 44 |  |
San Diego Prepared Foods operation [Member] | Prepared Foods [Member] | Selling, General and Administrative Expenses [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Asset Impairment Charges |  |  | 8 |  |
San Diego Prepared Foods operation [Member] | Prepared Foods [Member] | Fair Value, Measurements, Nonrecurring [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Asset Impairment Charges |  |  | 52 |  |
Property, Plant and Equipment Impairment |  |  | 43 |  |
Impairment of Intangible Assets, Finite-lived |  |  | 8 |  |
Other Asset Impairment Charges |  |  | 1 |  |
San Diego Prepared Foods operation [Member] | Prepared Foods [Member] | Fair Value, Measurements, Nonrecurring [Member] | Cost of Sales [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Asset Impairment Charges |  |  | 44 |  |
San Diego Prepared Foods operation [Member] | Prepared Foods [Member] | Fair Value, Measurements, Nonrecurring [Member] | Selling, General and Administrative Expenses [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Asset Impairment Charges |  |  | $ 8 |  |
Maximum [Member] |  |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |  |
Short Term Investment Maturity Period |  |  | 12 months |  |
Available For Sale Securities Debt Maturity Period |  |  | 32 years |  |

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