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Income Taxes - Additional Information (Details) $ in Millions, € in Billions |  | 12 Months Ended |  |
--- | --- | --- | --- | ---
Aug. 30, 2016 EUR (€) Subsidiary | Sep. 30, 2023 USD ($) | Sep. 24, 2022 USD ($) | Sep. 25, 2021 USD ($) | Sep. 30, 2023 EUR (€) | Sep. 26, 2020 USD ($)
Income Tax Contingency [Line Items] |  |  |  |  |  |
Foreign pre-tax earnings |  | $ 72,900 | $ 71,300 | $ 68,700 |  |
U.S. statutory federal income tax rate |  | 21.00% | 21.00% | 21.00% |  |
Foreign tax credit carryforwards |  | $ 5,200 |  |  |  |
Research and development tax credit carryforwards |  | 3,000 |  |  |  |
Gross unrecognized tax benefits |  | 19,454 | $ 16,758 | $ 15,477 |  | $ 16,475
Gross unrecognized tax benefits that would impact effective tax rate, if recognized |  | 9,500 | $ 8,000 |  |  |
Reasonably possible decrease in gross unrecognized tax benefits over next 12 months |  | $ 4,500 |  |  |  |
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 |  |  |  |  |

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