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Debt - Additional Information (Detail)
$ in Millions, ¥ in Billions
12 Months Ended
Sep. 24, 2016
USD ($)
Sep. 26, 2015
USD ($)
Sep. 27, 2014
USD ($)
Sep. 24, 2016
JPY (¥)
Jun. 25, 2016
USD ($)
Mar. 26, 2016
USD ($)
Debt Instrument [Line Items]            
Commercial paper $ 8,105 $ 8,499        
Aggregate principal balance of debt 78,384 55,701        
Interest expense $ 1,400 $ 722 $ 381      
Commercial paper            
Debt Instrument [Line Items]            
Commercial paper, weighted-average interest rate 0.45% 0.14%   0.45%    
Level 2            
Debt Instrument [Line Items]            
Debt instrument fair value $ 81,700 $ 54,900        
Currency Swaps            
Debt Instrument [Line Items]            
Derivative, notional amount         $ 1,000  
Interest Rate Swap            
Debt Instrument [Line Items]            
Derivative, notional amount 1,800         $ 5,000
Third quarter 2015 Japanese yen-denominated debt issuance | Net investment hedges            
Debt Instrument [Line Items]            
Debt instrument, face amount | ¥       ¥ 195.5    
Debt instrument, senior notes $ 1,900          
Maximum            
Debt Instrument [Line Items]            
Commercial paper, maturity period 9 months