Income Taxes - Reconciliation of Provision for Income Taxes to Amount Computed by Applying the Statutory Federal Income Tax Rate to Income Before Provision for Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2023	Sep. 24, 2022	Sep. 25, 2021
Income Tax Disclosure [Abstract]
Computed expected tax	$ 23,885	$ 25,012	$ 22,933
State taxes, net of federal effect	1,124	1,518	1,151
Earnings of foreign subsidiaries	(5,744)	(4,366)	(4,715)
Research and development credit, net	(1,212)	(1,153)	(1,033)
Excess tax benefits from equity awards	(1,120)	(1,871)	(2,137)
Foreign-derived intangible income deduction	0	(296)	(1,372)
Other	(192)	456	(300)
Provision for income taxes	$ 16,741	$ 19,300	$ 14,527
Effective tax rate	14.70%	16.20%	13.30%