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Business Segments and Geographic Information - Revenues by Geography (Detail)
 12 Months Ended
Sep. 30, 2023
Sep. 24, 2022
Sep. 25, 2021
Schedule Of Geographical Segments [Line Items]      
Revenues 100.00% 100.00% 100.00%
United States      
Schedule Of Geographical Segments [Line Items]      
Revenues 75.90% 71.30% 69.30%
Europe      
Schedule Of Geographical Segments [Line Items]      
Revenues 12.90% 18.30% 21.30%
Asia-Pacific      
Schedule Of Geographical Segments [Line Items]      
Revenues 6.30% 7.40% 6.50%
Rest of world      
Schedule Of Geographical Segments [Line Items]      
Revenues 4.90% 3.00% 2.90%