Composition of Certain Financial Statement Items Investment and Other Income, Net (Details) - USD ($) $ in Millions		12 Months Ended
		Sep. 27, 2026	Sep. 28, 2025	Sep. 29, 2024
Investment Income, Net [Abstract]
Interest and dividend income		$ 424	$ 639	$ 675
Net gains on marketable securities (1)	[1]	386	254	14
Net gains on other investments		252	44	175
Net gains on deferred compensation plan assets		176	127	198
Impairment losses on other investments without readily determinable fair value		(88)	(113)	(79)
Other		37	9	(11)
Investment and other income, net		1,445	972	962
Income (Loss) from Equity Method Investments		$ 258	$ 12	$ (10)

[1] Primarily consist of net unrealized gains related to certain marketable equity securities