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Organization and Significant Accounting Policies - Long-Lived Assets, Additional Information (Details) - USD ($)
12 Months Ended
Sep. 28, 2024
Sep. 30, 2023
Sep. 24, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]      
Impairment, Intangible Asset, Statement of Income or Comprehensive Income [Extensible Enumeration] Impairment of intangibles Impairment of intangibles  
Impairment charge $ 12,800,000 $ 11,500,000 $ 0