Revenue - Net Sales Disaggregated by Significant Products and Services (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jul. 01, 2023	Jun. 25, 2022	Jul. 01, 2023	Jun. 25, 2022
Disaggregation of Revenue [Line Items]
Net sales	$ 81,797	$ 82,959	$ 293,787	$ 304,182
Revenue recognized that was included in deferred revenue at the beginning of the period	3,300	3,100	7,000	6,300
iPhone
Disaggregation of Revenue [Line Items]
Net sales	39,669	40,665	156,778	162,863
Mac
Disaggregation of Revenue [Line Items]
Net sales	6,840	7,382	21,743	28,669
iPad
Disaggregation of Revenue [Line Items]
Net sales	5,791	7,224	21,857	22,118
Wearables, Home and Accessories
Disaggregation of Revenue [Line Items]
Net sales	8,284	8,084	30,523	31,591
Services
Disaggregation of Revenue [Line Items]
Net sales	$ 21,213	$ 19,604	$ 62,886	$ 58,941