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Financial Instruments - Additional Information (Details)
$ in Millions
3 Months Ended 9 Months Ended 12 Months Ended
Jul. 01, 2017
USD ($)
Customer
Jul. 01, 2017
USD ($)
Customer
Sep. 24, 2016
USD ($)
Customer
Financial Instruments [Line Items]      
Maturities of long-term marketable securities, minimum   1 year  
Maturities of long-term marketable securities, maximum   5 years  
Hedged foreign currency transactions, typical term   12 months  
Hedged interest rate transactions, expected period to be recognized   10 years  
Potential reduction to derivative assets resulting from rights of set-off under master netting arrangements $ 1,300 $ 1,300 $ 1,500
Potential reduction to derivative liabilities resulting from rights of set-off under master netting arrangements 1,300 1,300 1,500
Net derivative assets/(liabilities) after potential reductions under master netting arrangements $ (326) $ (326) $ 160
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 1
Trade receivables | Credit concentration risk | Customer one      
Financial Instruments [Line Items]      
Concentration risk, percentage     10.00%
Trade receivables | Credit concentration risk | Cellular network carriers      
Financial Instruments [Line Items]      
Concentration risk, percentage   46.00% 63.00%
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 | Customer 3 3 2
Non-trade receivables | Credit concentration risk | Vendor one      
Financial Instruments [Line Items]      
Concentration risk, percentage   39.00% 47.00%
Non-trade receivables | Credit concentration risk | Vendor two      
Financial Instruments [Line Items]      
Concentration risk, percentage   19.00% 21.00%
Non-trade receivables | Credit concentration risk | Vendor three      
Financial Instruments [Line Items]      
Concentration risk, percentage   16.00%  
Other current assets      
Financial Instruments [Line Items]      
Net cash collateral posted, derivative instruments $ 162 $ 162  
Accrued expenses      
Financial Instruments [Line Items]      
Net cash collateral received, derivative instruments     $ 163
Derivatives not designated as accounting hedges | Net sales      
Financial Instruments [Line Items]      
Non-designated derivatives, fair value adjustment gains/(losses) (77) 129  
Derivatives not designated as accounting hedges | Cost of sales      
Financial Instruments [Line Items]      
Non-designated derivatives, fair value adjustment gains/(losses) 12 91  
Derivatives not designated as accounting hedges | Other income/(expense), net      
Financial Instruments [Line Items]      
Non-designated derivatives, fair value adjustment gains/(losses) $ 49 $ 481