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. 27, 2025	Sep. 28, 2024	Sep. 30, 2023
Income Tax Disclosure [Abstract]
Computed expected tax	$ 27,873	$ 25,932	$ 23,885
Earnings of foreign subsidiaries	(8,120)	(5,311)	(5,744)
Change in valuation allowance	2,091	0	0
Research and development credit, net	(1,049)	(1,397)	(1,212)
Impact of the State Aid Decision	(486)	10,246	0
Other	410	279	(188)
Provision for income taxes	$ 20,719	$ 29,749	$ 16,741
Effective tax rate	15.60%	24.10%	14.70%