Segment Information and Geographic Data - Reconciliation of Segment Operating Income to the Condensed Consolidated Statements of Operations (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Jun. 26, 2021	Jun. 27, 2020	Jun. 26, 2021	Jun. 27, 2020
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating income	$ 24,126	$ 13,091	$ 85,163	$ 51,513
Research and development expense	(5,717)	(4,758)	(16,142)	(13,774)
Operating segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating income	31,451	19,296	106,048	70,052
Segment reconciling items
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Research and development expense	(5,717)	(4,758)	(16,142)	(13,774)
Corporate non-segment
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Other corporate expenses, net	$ (1,608)	$ (1,447)	$ (4,743)	$ (4,765)

The net result for the period of deducting operating expenses from operating revenues.

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