Derivative Instruments - Adjustments Related to Fair Value Hedges included in Net Interest Expense in Consolidated Statements of Income (Detail) - Interest rate - Interest expense, net - USD ($) $ in Millions	12 Months Ended
	Oct. 02, 2021	Oct. 03, 2020	Sep. 28, 2019
Derivative Instruments, Gain (Loss) [Line Items]
Pay-floating swaps	$ (603)	$ 479	$ 337
Borrowings hedged with pay-floating swaps	603	(479)	(337)
Derivative, Gain (Loss) on Derivative, Net	$ 143	$ 28	$ (58)