Property, Plant and Equipment, Net (Detail) - USD ($) $ in Millions	Dec. 26, 2015	Sep. 26, 2015
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	$ 51,342	$ 49,257
Accumulated depreciation and amortization	(29,042)	(26,786)
Total property, plant and equipment, net	22,300	22,471
Land and Buildings
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	7,729	6,956
Machinery, Equipment and Internal-Use Software
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	38,039	37,038
Leasehold Improvements
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	$ 5,574	$ 5,263