Revenue - Net Sales Disaggregated by Significant Products and Services (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 25, 2022	Jun. 26, 2021	Jun. 25, 2022	Jun. 26, 2021
Disaggregation of Revenue [Line Items]
Net sales	$ 82,959	$ 81,434	$ 304,182	$ 282,457
Revenue recognized that was included in deferred revenue at the beginning of the period	3,100	3,000	6,300	5,500
iPhone
Disaggregation of Revenue [Line Items]
Net sales	40,665	39,570	162,863	153,105
Mac
Disaggregation of Revenue [Line Items]
Net sales	7,382	8,235	28,669	26,012
iPad
Disaggregation of Revenue [Line Items]
Net sales	7,224	7,368	22,118	23,610
Wearables, Home and Accessories
Disaggregation of Revenue [Line Items]
Net sales	8,084	8,775	31,591	29,582
Services
Disaggregation of Revenue [Line Items]
Net sales	$ 19,604	$ 17,486	$ 58,941	$ 50,148