v2.4.0.8
Financial Instruments - Additional Information (Detail) (USD $)
12 Months Ended
Sep. 27, 2014
Sep. 28, 2013
Sep. 29, 2012
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, expected occurrence 12 months    
Hedged interest rate transactions, expected occurrence 4 years    
Cash collateral posted, derivative instruments   $ 164,000,000  
Net cash collateral received, derivative instruments 2,100,000,000    
Reduction to derivative assets by rights of set-off associated with derivative contracts 1,600,000,000 333,000,000  
Reduction to derivative liabilities by rights of set-off associated with derivative contracts 1,600,000,000 333,000,000  
Net derivative assets (liabilities) (549,000,000) (57,000,000)  
Number of customers representing 10% or more of trade receivables 2 2  
Number of vendors representing a significant portion of non-trade receivables 3 3  
Cash flow hedges | Other income/expense, net
     
Financial Instruments [Line Items]      
Loss recognized for ineffective portions of and amounts excluded from effectiveness testing $ 120,000,000 $ 301,000,000 $ 658,000,000
Trade Receivables | Customer One
     
Financial Instruments [Line Items]      
Concentration risk, percentage 16.00% 13.00%  
Trade Receivables | Customer Two
     
Financial Instruments [Line Items]      
Concentration risk, percentage 13.00% 10.00%  
Trade Receivables | Total Cellular Network Carriers
     
Financial Instruments [Line Items]      
Concentration risk, percentage 72.00% 68.00%  
Non-Trade Receivables | Vendor One
     
Financial Instruments [Line Items]      
Concentration risk, percentage 51.00% 47.00%  
Non-Trade Receivables | Vendor Two
     
Financial Instruments [Line Items]      
Concentration risk, percentage 16.00% 21.00%  
Non-Trade Receivables | Vendor Three
     
Financial Instruments [Line Items]      
Concentration risk, percentage 14.00% 15.00%