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