Commitments and Contingencies - Additional Information (Detail)	9 Months Ended
	Jun. 27, 2015 USD ($) Store	Jul. 22, 2015 USD ($)	May. 18, 2015 USD ($)	Feb. 24, 2015 USD ($)	Sep. 27, 2014 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	456
Total future minimum lease payments under noncancelable operating leases	$ 5,000,000,000
Outstanding off-balance sheet third party manufacturing commitments and component purchase commitments	21,700,000,000
Additional off-balance sheet obligations	4,800,000,000
Indemnification Agreement
Commitments and Contingencies Disclosure [Line Items]
Liability for infringement costs	$ 0				$ 0
Subsequent event
Commitments and Contingencies Disclosure [Line Items]
Additional off-balance sheet obligations		$ 2,100,000,000
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	$ 3,400,000,000
Retail Space Lease | Maximum
Commitments and Contingencies Disclosure [Line Items]
Term of leases	20 years
Retail Space Lease | Minimum
Commitments and Contingencies Disclosure [Line Items]
Term of leases	5 years
Retail Space Lease | Majority
Commitments and Contingencies Disclosure [Line Items]
Term of leases	10 years
Smartflash LLC
Commitments and Contingencies Disclosure [Line Items]
Result of legal proceedings				$ 533,000,000
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