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)