Income Tax Expense / (Benefit) (Detail) - USD ($) $ in Millions	12 Months Ended
	Sep. 27, 2025	Sep. 28, 2024	Sep. 30, 2023
Current
Federal	$ (130)	$ 1,393	$ 1,475
State	413	237	402
Foreign	906	973	867
Current Income Tax Expense (Benefit), Total	1,189	2,603	2,744
Deferred
Federal	(2,171)	(764)	(1,180)
State	(527)	54	4
Foreign	81	(97)	(189)
Deferred Income Tax Expense (Benefit), Total	(2,617)	(807)	(1,365)
Income tax expense from continuing operations	$ (1,428)	$ 1,796	$ 1,379