Condensed Consolidated Financial Statement Details - Property, Plant and Equipment, Net (Details) - USD ($) $ in Millions	Jul. 01, 2017	Sep. 24, 2016
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	$ 68,981	$ 61,245
Accumulated depreciation and amortization	(39,695)	(34,235)
Total property, plant and equipment, net	29,286	27,010
Land and buildings
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	12,529	10,185
Machinery, equipment and internal-use software
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	49,491	44,543
Leasehold improvements
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	$ 6,961	$ 6,517