Revenue - Net Sales Disaggregated by Significant Products and Services (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2022	Dec. 25, 2021
Disaggregation of Revenue [Line Items]
Net sales	$ 117,154	$ 123,945
Revenue recognized that was included in deferred revenue at the beginning of the period	3,400	3,000
iPhone
Disaggregation of Revenue [Line Items]
Net sales	65,775	71,628
Mac
Disaggregation of Revenue [Line Items]
Net sales	7,735	10,852
iPad
Disaggregation of Revenue [Line Items]
Net sales	9,396	7,248
Wearables, Home and Accessories
Disaggregation of Revenue [Line Items]
Net sales	13,482	14,701
Services
Disaggregation of Revenue [Line Items]
Net sales	$ 20,766	$ 19,516