Segment Information and Geographic Data - Information by Reportable Segment (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 30, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
Net sales	$ 119,575	$ 117,154
Operating income	40,373	36,016
Americas
Segment Reporting Information [Line Items]
Net sales	50,430	49,278
Operating income	20,357	17,864
Europe
Segment Reporting Information [Line Items]
Net sales	30,397	27,681
Operating income	12,711	10,017
Greater China
Segment Reporting Information [Line Items]
Net sales	20,819	23,905
Operating income	8,622	10,437
Japan
Segment Reporting Information [Line Items]
Net sales	7,767	6,755
Operating income	3,819	3,236
Rest of Asia Pacific
Segment Reporting Information [Line Items]
Net sales	10,162	9,535
Operating income	$ 4,579	$ 3,851