Business Segments and Geographic Information - Revenues by Geography (Detail)	12 Months Ended
	Sep. 24, 2022	Sep. 25, 2021	Sep. 26, 2020
Schedule Of Geographical Segments [Line Items]
Revenues	100.00%	100.00%	100.00%
United States
Schedule Of Geographical Segments [Line Items]
Revenues	71.30%	69.30%	75.80%
Europe
Schedule Of Geographical Segments [Line Items]
Revenues	18.30%	21.30%	15.10%
Asia-Pacific
Schedule Of Geographical Segments [Line Items]
Revenues	7.40%	6.50%	6.00%
Rest of world
Schedule Of Geographical Segments [Line Items]
Revenues	3.00%	2.90%	3.10%