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Commitments and Contingencies - Additional Information (Detail)
12 Months Ended
Sep. 26, 2015
USD ($)
Store
Sep. 27, 2014
USD ($)
Sep. 28, 2013
USD ($)
May. 18, 2015
USD ($)
Mar. 06, 2014
USD ($)
Aug. 24, 2012
USD ($)
Commitments and Contingencies Disclosure [Line Items]            
Purchase commitments maximum period 150 days          
Number of retail stores | Store 463          
Total future minimum lease payments under noncancelable operating leases $ 6,271,000,000          
Rent expense under cancelable and noncancelable operating leases 794,000,000 $ 717,000,000 $ 645,000,000      
Outstanding off-balance sheet third party manufacturing commitments and component purchase commitments 29,500,000,000          
Additional off-balance sheet obligations 7,300,000,000          
Samsung Electronics Co Ltd            
Commitments and Contingencies Disclosure [Line Items]            
Result of legal proceedings           $ 1,050,000,000
Award from legal proceeding       $ 548,000,000 $ 930,000,000  
Indemnification Agreement            
Commitments and Contingencies Disclosure [Line Items]            
Liability for infringement costs $ 0 $ 0        
Major Facility Lease | Maximum            
Commitments and Contingencies Disclosure [Line Items]            
Term of leases 10 years          
Retail Space Lease            
Commitments and Contingencies Disclosure [Line Items]            
Total future minimum lease payments under noncancelable operating leases $ 3,600,000,000          
Retail Space Lease | Minimum            
Commitments and Contingencies Disclosure [Line Items]            
Term of leases 5 years          
Retail Space Lease | Maximum            
Commitments and Contingencies Disclosure [Line Items]            
Term of leases 20 years          
Retail Space Lease | Majority            
Commitments and Contingencies Disclosure [Line Items]            
Term of leases 10 years