Business Segments and Geographic Information - Revenues by Geography (Detail)	3 Months Ended		9 Months Ended
	Jul. 01, 2023	Jun. 25, 2022	Jul. 01, 2023	Jun. 25, 2022
Schedule Of Geographical Segments [Line Items]
Revenues	100.00%	100.00%	100.00%	100.00%
United States
Schedule Of Geographical Segments [Line Items]
Revenues	76.20%	73.30%	75.90%	70.10%
Europe
Schedule Of Geographical Segments [Line Items]
Revenues	13.10%	16.40%	13.90%	19.20%
Asia-Pacific
Schedule Of Geographical Segments [Line Items]
Revenues	6.40%	7.10%	6.20%	7.70%
Rest of World
Schedule Of Geographical Segments [Line Items]
Revenues	4.30%	3.20%	4.00%	3.00%