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. 27, 2025	Sep. 28, 2024	Sep. 30, 2023
Derivative Instruments, Gain (Loss) [Line Items]
Pay-floating swaps	$ 182	$ 799	$ (14)
Borrowings hedged with pay-floating swaps	(182)	(799)	14
Benefit (expense) associated with interest accruals on pay-floating swaps	$ (396)	$ (611)	$ (510)