Income Taxes - Additional Information (Detail) - USD ($) $ in Millions |
3 Months Ended | 12 Months Ended | ||
|---|---|---|---|---|
Jun. 28, 2025 |
Sep. 27, 2025 |
Sep. 28, 2024 |
Sep. 30, 2023 |
|
| Income Taxes [Line Items] | ||||
| Gross unrecognized tax benefits that would reduce income tax expense and effective tax rate, if recognized | $ 800 | $ 1,400 | $ 1,800 | |
| Accrued interest and penalties related to unrecognized tax benefits | 300 | 900 | 1,000 | |
| Additional accrued interest and penalties related to unrecognized tax benefits | 177 | 157 | 210 | |
| Reductions in accrued interest as a result of audit settlements and other prior-year adjustments | 816 | 151 | 241 | |
| Unrecognized tax benefits, reasonably possible reduction due to payments for or resolution of open tax matters | 400 | |||
| Adjustments to Income Tax Expense, Income Tax Benefit from Share-based Compensation | 35 | $ 55 | $ 93 | |
| Hulu LLC | ||||
| Income Taxes [Line Items] | ||||
| Other Tax Expense (Benefit) | $ 3,300 | $ (3,300) | ||