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Commitments (Narrative) (Details) - USD ($) $ in Millions | 12 Months Ended |  |
--- | --- | --- | ---
Oct. 03, 2020 | Sep. 28, 2019 | Sep. 29, 2018
Guarantor Obligations [Line Items] |  |  |
Cash Flow Assistance Program, Estimated Allowance For Uncollectible Receivables | $ 0 | $ 0 |
Restricted Cash | 46 | 0 | $ 0
Guarantor Obligations, Current Carrying Value | 0 | 0 |
Potential maximum obligation under cash flow assistance program | 320 |  |
Total receivables under cash flow assistance program | 29 | $ 5 |
Industrial Revenue Bonds [Member] |  |  |
Guarantor Obligations [Line Items] |  |  |
Fair Value Disclosure, Off-balance Sheet Risks, Face Amount, Asset | $ 573 |  |
Guarantee Obligations [Member] |  |  |
Guarantor Obligations [Line Items] |  |  |
Guarantor Obligations, Maximum Exposure, Period | 10 years |  |
Maximum potential amount | $ 13 |  |

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