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Fair Value Measurements (Narrative) (Details) - USD ($) $ in Millions | 12 Months Ended
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Oct. 03, 2021 | Sep. 27, 2020 | Sep. 29, 2019
Debt Securities, Available-for-sale [Abstract] |  |  |
Proceeds from sale of available-for-sale securities | $ 134.1 | $ 177.4 | $ 291.1
Trading Securities [Abstract] |  |  |
Management Deferred Compensation Plan liability | $ 105.2 | $ 91.4 |
Maximum [Member] |  |  |
Debt Securities, Available-for-sale [Abstract] |  |  |
Long-term investments, contractual maturity period | 4 years |  |

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- Definition Aggregate carrying value as of the balance sheet date of the liabilities for all deferred compensation arrangements payable within one year (or the operating cycle, if longer). Represents currently earned compensation under compensation arrangements that is not actually paid until a later date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 710 -SubTopic 10 -Section 25 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=6409733&loc=d3e19512-108361 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 710 -SubTopic 10 -Section 30 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6409875&loc=d3e20028-108363 + Details
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