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
		Oct. 02, 2021	Oct. 03, 2020	Sep. 28, 2019
Earnings Per Share [Abstract]
Weighted Average Number of Shares Outstanding, Basic		1,816	1,808	1,656
Weighted average dilutive impact of Awards	[1]	12	0	10
Weighted Average Number of Shares Outstanding, Diluted		1,828	1,808	1,666
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount		4	35	7

[1] Amounts exclude all potential common and common equivalent shares for periods when there is a net loss from continuing operations.