Property, Plant and Equipment, Net (Detail) - USD ($) $ in Millions	Mar. 26, 2016	Sep. 26, 2015
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	$ 54,051	$ 49,257
Accumulated depreciation and amortization	(30,848)	(26,786)
Total property, plant and equipment, net	23,203	22,471
Land and Buildings
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	8,391	6,956
Machinery, Equipment and Internal-Use Software
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	39,723	37,038
Leasehold Improvements
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	$ 5,937	$ 5,263