Segment Information and Geographic Data - Reconciliation of Segment Operating Income to the Condensed Consolidated Statements of Operations (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 26, 2022	Mar. 27, 2021	Mar. 26, 2022	Mar. 27, 2021
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating income	$ 29,979	$ 27,503	$ 71,467	$ 61,037
Research and development expense	(6,387)	(5,262)	(12,693)	(10,425)
Operating segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating income	38,215	34,237	87,872	74,597
Segment reconciling items
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Research and development expense	(6,387)	(5,262)	(12,693)	(10,425)
Corporate non-segment
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Other corporate expenses, net	$ (1,849)	$ (1,472)	$ (3,712)	$ (3,135)