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Commitments and Contingencies - Additional Information (Detail)
$ in Millions
1 Months Ended 3 Months Ended
Dec. 26, 2015
USD ($)
Store
Dec. 26, 2015
USD ($)
Store
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 469 469      
Total future minimum lease payments under noncancelable operating leases $ 6,600 $ 6,600      
Samsung Electronics Co Ltd          
Commitments and Contingencies Disclosure [Line Items]          
Result of legal proceedings         $ 1,050
Award from legal proceeding     $ 548 $ 930  
Proceeds from legal settlements 548        
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 $ 3,700 $ 3,700      
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