Reconciliation of Segment Operating Income to Consolidated Statements of Operations (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Sep. 27, 2014		Sep. 28, 2013		Sep. 29, 2012
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating income	$ 52,503		$ 48,999		$ 55,241
Share-based compensation expense	(2,863)		(2,253)		(1,740)
Operating Segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Operating income	65,497		58,980		62,853
Segment Reconciling Items
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Research and development expense	(4,825)	[1]	(3,558)	[1]	(2,713)	[1]
Share-based compensation expense	(2,863)		(2,253)		(1,740)
Corporate assets
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Other corporate expenses, net	$ (5,306)		$ (4,170)		$ (3,159)

[1] Amount excludes research and development share-based compensation expense.