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Financial Instruments - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended 12 Months Ended
Apr. 01, 2017
Apr. 01, 2017
Sep. 24, 2016
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 $ 1,500 $ 1,500 $ 1,500
Potential reduction to derivative liabilities resulting from rights of set-off under master netting arrangements 1,500 1,500 1,500
Net derivative assets (liabilities) after potential reductions under master netting arrangements (77) $ (77) $ 160
Trade receivables | Credit concentration risk | Customer one      
Financial Instruments [Line Items]      
Concentration risk, percentage   12.00% 10.00%
Trade receivables | Credit concentration risk | Customer two      
Financial Instruments [Line Items]      
Concentration risk, percentage   10.00%  
Trade receivables | Credit concentration risk | Cellular network carriers      
Financial Instruments [Line Items]      
Concentration risk, percentage   52.00% 63.00%
Non-trade receivables | Credit concentration risk | Vendor one      
Financial Instruments [Line Items]      
Concentration risk, percentage   42.00% 47.00%
Non-trade receivables | Credit concentration risk | Vendor two      
Financial Instruments [Line Items]      
Concentration risk, percentage   17.00% 21.00%
Non-trade receivables | Credit concentration risk | Vendor three      
Financial Instruments [Line Items]      
Concentration risk, percentage   14.00%  
Other current assets      
Financial Instruments [Line Items]      
Net cash collateral posted, derivative instruments 230 $ 230  
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 or losses (67) 206  
Derivatives not designated as accounting hedges | Cost of sales      
Financial Instruments [Line Items]      
Non-designated derivatives, fair value adjustment gains or losses (253) 79  
Derivatives not designated as accounting hedges | Other income/(expense), net      
Financial Instruments [Line Items]      
Non-designated derivatives, fair value adjustment gains or losses $ (76) $ 432