Income Taxes - Additional Information (Detail) - USD ($) $ in Millions |
12 Months Ended | ||
|---|---|---|---|
Sep. 28, 2024 |
Sep. 30, 2023 |
Oct. 01, 2022 |
|
| Income Taxes [Line Items] | |||
| Gross unrecognized tax benefits that would reduce income tax expense and effective tax rate, if recognized | $ 1,400 | $ 1,800 | $ 1,900 |
| Accrued interest and penalties related to unrecognized tax benefits | 900 | 1,000 | 1,000 |
| Additional accrued interest and penalties related to unrecognized tax benefits | 157 | 210 | 157 |
| Reductions in accrued interest as a result of audit settlements and other prior-year adjustments | 151 | 241 | 119 |
| Unrecognized tax benefits, reasonably possible reduction due to payments for or resolution of open tax matters | 900 | ||
| Adjustments to Income Tax Expense, Income Tax Benefit from Share-based Compensation | $ 55 | $ 93 | $ 2 |