Consolidated Financial Statement Details - Property, Plant and Equipment, Net (Details) - USD ($) $ in Millions	Sep. 26, 2020	Sep. 28, 2019
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	$ 103,526	$ 95,957
Accumulated depreciation and amortization	(66,760)	(58,579)
Total property, plant and equipment, net	36,766	37,378
Land and buildings
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	17,952	17,085
Machinery, equipment and internal-use software
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	75,291	69,797
Leasehold improvements
Property, Plant and Equipment [Line Items]
Gross property, plant and equipment	$ 10,283	$ 9,075

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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