Summary of Significant Accounting Policies - Reconciliation of Weighted Average Number of Common and Common Equivalent Shares Outstanding and Number of Awards Excluded from Diluted Earnings Per Share (Detail) - shares shares in Millions	12 Months Ended
	Sep. 30, 2023	Oct. 01, 2022	Oct. 02, 2021
Earnings Per Share [Abstract]
Weighted Average Number of Shares Outstanding, Basic	1,828	1,822	1,816
Weighted average dilutive impact of Awards	2	5	12
Weighted Average Number of Shares Outstanding, Diluted	1,830	1,827	1,828
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount	24	15	4