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Fair Value Measurements (Narrative) (Details) - USD ($) $ in Millions | 12 Months Ended
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Oct. 02, 2022 | Oct. 03, 2021 | Sep. 27, 2020
Debt Securities, Available-for-sale [Abstract] |  |  |
Proceeds from sale of available-for-sale securities | $ 72.6 | $ 134.1 | $ 177.4
Trading Securities [Abstract] |  |  |
Management Deferred Compensation Plan liability | $ 85.9 | $ 105.2 |
Maximum [Member] |  |  |
Debt Securities, Available-for-sale [Abstract] |  |  |
Long-term investments, contractual maturity period | 5 years |  |

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