Condensed Consolidated Financial Statement Details - Property, Plant and Equipment, Net (Details) - USD ($) $ in Millions	Dec. 26, 2020	Sep. 26, 2020
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	$ 105,493	$ 103,526
Accumulated depreciation and amortization	(67,560)	(66,760)
Total property, plant and equipment, net	37,933	36,766
Land and buildings
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	18,885	17,952
Machinery, equipment and internal-use software
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	76,224	75,291
Leasehold improvements
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	$ 10,384	$ 10,283

Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.

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