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Financial Instruments - Additional Information (Details)
12 Months Ended
Sep. 25, 2021
Vendor
Customer
Sep. 26, 2020
Customer
Vendor
Trade receivables | Credit concentration risk    
Financial Instruments [Line Items]    
Number of customers that individually represented 10% or more of total trade receivables | Customer 0 0
Trade receivables | Credit concentration risk | Cellular network carriers    
Financial Instruments [Line Items]    
Concentration risk, percentage 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 | Vendor 3 2
Non-trade receivables | Credit concentration risk | Vendor one    
Financial Instruments [Line Items]    
Concentration risk, percentage 52.00% 57.00%
Non-trade receivables | Credit concentration risk | Vendor two    
Financial Instruments [Line Items]    
Concentration risk, percentage 11.00% 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 21 years