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
	Sep. 30, 2023	Oct. 01, 2022	Oct. 02, 2021
Derivative Instruments, Gain (Loss) [Line Items]
Pay-floating swaps	$ (14)	$ (1,635)	$ (603)
Borrowings hedged with pay-floating swaps	14	1,635	603
Benefit (expense) associated with interest accruals on pay-floating swaps	$ (510)	$ 31	$ 143