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Organization and Significant Accounting Policies - 401(k) Plans, Additional Information (Details) - USD ($) $ in Millions | 12 Months Ended
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Sep. 28, 2024 | Sep. 30, 2023 | Sep. 24, 2022
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items] |  |  |
Employees benefit plan | $ 6.8 | $ 7.9 | $ 7.2
Class A common stock |  |  |
Deferred Compensation Arrangement with Individual, Postretirement Benefits [Line Items] |  |  |
401(k) matching contributions made in Class A common stock (in shares) | 198,697 | 216,000 | 170,000

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- Definition Amount of discretionary contributions made by an employer to a defined contribution plan. + References No definition available. + Details
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