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Fair Value Measurements Fair Value Measurements (Narrative) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Oct. 02, 2021 | Oct. 03, 2020 | Sep. 28, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Derivative Liability, Collateral, Right to Reclaim Cash, Offset | $ 56 | $ 16 |
Asset Impairment Charges | $ 60 | $ 48 | $ 94
Wal-Mart Stores, Inc. [Member] | Accounts Receivable [Member] | Customer Concentration Risk [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Concentration, Percentage | 16.30% | 16.50% |
Prepared Foods business [Member] | Prepared Foods [Member] | Cost of Sales [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Asset Impairment Charges |  |  | $ 41
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 | 48 years |  |
Maximum [Member] | Accounts Receivable [Member] | Customer Concentration Risk [Member] |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Concentration, Percentage | 10.00% | 10.00% |

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