Revenue - Net Sales Disaggregated by Significant Products and Services (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 01, 2023	Mar. 26, 2022	Apr. 01, 2023	Mar. 26, 2022
Disaggregation of Revenue [Line Items]
Net sales	$ 94,836	$ 97,278	$ 211,990	$ 221,223
Revenue recognized that was included in deferred revenue at the beginning of the period	3,500	3,000	5,500	4,800
iPhone
Disaggregation of Revenue [Line Items]
Net sales	51,334	50,570	117,109	122,198
Mac
Disaggregation of Revenue [Line Items]
Net sales	7,168	10,435	14,903	21,287
iPad
Disaggregation of Revenue [Line Items]
Net sales	6,670	7,646	16,066	14,894
Wearables, Home and Accessories
Disaggregation of Revenue [Line Items]
Net sales	8,757	8,806	22,239	23,507
Services
Disaggregation of Revenue [Line Items]
Net sales	$ 20,907	$ 19,821	$ 41,673	$ 39,337