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Fair Value Measurements (Narrative) (Details) - USD ($) $ in Millions | 12 Months Ended
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Sep. 28, 2025 | Sep. 29, 2024 | Oct. 01, 2023
Debt Securities, Available-for-sale [Abstract] |  |  |
Proceeds from sale of available-for-sale securities | $ 1.1 | $ 1.3 | $ 2.5
Trading Securities [Abstract] |  |  |
Management Deferred Compensation Plan liability | $ 115.6 | $ 112.3 |
Maximum [Member] |  |  |
Debt Securities, Available-for-sale [Abstract] |  |  |
Long-term investments, contractual maturity period | 5 years |  |

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