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Income Taxes - Additional Information (Details) $ in Millions, € in Billions		12 Months Ended
	Aug. 30, 2016 EUR (€) Subsidiary	Sep. 25, 2021 USD ($)	Sep. 26, 2020 USD ($)	Sep. 28, 2019 USD ($)	Sep. 25, 2021 EUR (€)	Sep. 29, 2018 USD ($)
Income Tax Contingency [Line Items]
Foreign pre-tax earnings		$ 68,700	$ 38,100	$ 44,300
U.S. statutory federal income tax rate		21.00%	21.00%	21.00%
Foreign tax credit carryforwards		$ 2,600
Research and development tax credit carryforwards		1,600
Gross unrecognized tax benefits		15,477	$ 16,475	$ 15,619		$ 9,694
Gross unrecognized tax benefits that would impact effective tax rate, if recognized		6,600	8,800
Reasonably possible decrease in gross unrecognized tax benefits over next 12 months		1,200
Gross interest and penalties accrued		1,500	1,400
Interest and penalty expense		$ 219	$ 85	$ 73
Unfavorable investigation outcome, EU State Aid rules
Income Tax Contingency [Line Items]
Number of subsidiaries impacted by the European Commission tax ruling \| Subsidiary	2
Maximum potential loss related to European Commission tax ruling \| €	€ 13.1				€ 12.7
Unfavorable investigation outcome, EU State Aid rules - interest component
Income Tax Contingency [Line Items]
Maximum potential loss related to European Commission tax ruling \| €	€ 1.2