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EMPLOYEE STOCK PLANS - Schedule of Share-based Compensation Expense (Details) - USD ($) $ in Millions | 12 Months Ended
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Sep. 27, 2024 | Sep. 29, 2023 | Sep. 30, 2022
Share-based Payment Arrangement, Expensed and Capitalized, Amount |  |  |
Total share-based compensation expense | $ 15.3 | $ 13.5 | $ 14.0
Cost of revenues |  |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount |  |  |
Total share-based compensation expense | 1.8 | 1.7 | 1.6
Research and development |  |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount |  |  |
Total share-based compensation expense | 3.4 | 3.3 | 3.1
Selling, general and administrative |  |  |
Share-based Payment Arrangement, Expensed and Capitalized, Amount |  |  |
Total share-based compensation expense | $ 10.1 | $ 8.5 | $ 9.3

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