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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (New Accounting Pronouncements) (Narrative) (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 28, 2018 | Oct. 02, 2020 | Sep. 27, 2019 | Sep. 28, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Reduction of operating expenses |  | $ (193,923) | $ (185,982) | $ (178,839)
Increase in other expenses |  | $ 1,362 | $ 796 | $ 4,122
Accounting Standards Update 2017-07 |  |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |  |
Reduction of operating expenses | $ 848 |  |  |
Increase in other expenses | $ 848 |  |  |

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- Definition Amount of income (expense) related to nonoperating activities, classified as other. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.9) -URI http://asc.fasb.org/extlink&oid=120395209&loc=SL114868664-224227 + Details
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