Income Taxes - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Oct. 01, 2022	Oct. 02, 2021	Oct. 03, 2020
Income Taxes [Line Items]
Gross unrecognized tax benefits that would reduce income tax expense and effective tax rate, if recognized	$ 1,900	$ 2,000	$ 2,100
Accrued interest and penalties related to unrecognized tax benefits	1,000	1,000	1,100
Additional accrued interest related to unrecognized tax benefits	157	191	211
Reductions in accrued interest as a result of audit settlements and other prior-year adjustments	119	256	101
Unrecognized tax benefits, reasonably possible reduction due to payments for or resolution of open tax matters	100
Adjustments to Income Tax Expense, Income Tax Benefit from Share-based Compensation	$ 2	$ 135	$ 64