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Organization and Significant Accounting Policies - Advertising Costs, Additional Information (Details) - USD ($)
$ in Millions
12 Months Ended
Sep. 27, 2025
Sep. 28, 2024
Sep. 30, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]      
Advertising expenses $ 65.9 $ 56.2 $ 43.6