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v3.23.3

Stockholders' Equity and Stock-Based Compensation - Stock-Based Compensation Expense in Consolidated Statement of Operations (Detail) - USD ($) shares in Thousands, $ in Millions |  | 12 Months Ended
--- | --- | ---
Dec. 08, 2022 | Sep. 30, 2023 | Sep. 24, 2022 | Sep. 25, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Stock-based compensation expense |  | $ 79.6 | $ 66.7 | $ 65.0
Employee Service Share-based Compensation, Tax Benefit from Compensation Expense |  | $ 10.7 | 8.6 | 7.9
2008 Equity Plan |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Share-Based Compensation Arrangement by Share-Based Payment Award, Number of Additional Shares Authorized | 6,500 |  |  |
Common stock, shares authorized |  | 38,000 |  |
Cost of revenues |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Stock-based compensation expense |  | $ 10.5 | 9.1 | 8.0
Research and development |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Stock-based compensation expense |  | 10.5 | 8.8 | 7.7
Selling and marketing |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Stock-based compensation expense |  | 12.0 | 10.5 | 9.5
General and Administrative Expense |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Stock-based compensation expense |  | 46.6 | 38.3 | 38.9
Restructuring Charges |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Stock-based compensation expense |  | $ 0.0 | $ 0.0 | $ 0.9

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