Financial Instruments - Additional Information (Details) - Vendor	6 Months Ended	12 Months Ended
	Mar. 26, 2022	Sep. 25, 2021
Trade receivables | Credit concentration risk | Cellular network carriers
Financial Instruments [Line Items]
Concentration risk, percentage	36.00%	42.00%
Non-trade receivables | Credit concentration risk
Financial Instruments [Line Items]
Number of vendors that individually represented 10% or more of total vendor non-trade receivables	2	3
Non-trade receivables | Credit concentration risk | Vendor one
Financial Instruments [Line Items]
Concentration risk, percentage	52.00%	52.00%
Non-trade receivables | Credit concentration risk | Vendor two
Financial Instruments [Line Items]
Concentration risk, percentage	12.00%	11.00%
Non-trade receivables | Credit concentration risk | Vendor three
Financial Instruments [Line Items]
Concentration risk, percentage		11.00%
Hedges of foreign currency exposure associated with revenue and inventory purchases
Financial Instruments [Line Items]
Hedged foreign currency transactions, expected recognition period	12 months
Hedges of foreign currency exposure associated with term debt and marketable securities
Financial Instruments [Line Items]
Hedged foreign currency transactions, expected recognition period	20 years