Comprehensive Income - Pre-tax Amounts Reclassified from AOCI into Condensed Consolidated Statements of Operations (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 25, 2016	Jun. 27, 2015	Jun. 25, 2016	Jun. 27, 2015
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Revenue	$ 42,358	$ 49,605	$ 168,787	$ 182,214
Cost of sales	26,252	29,924	102,337	109,136
Other income (expense), net	263	175	1,036	754
Income before provision for income taxes	(10,469)	(14,473)	(49,184)	(57,453)
Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income before provision for income taxes	(154)	(1,465)	(1,188)	(2,908)
Reclassification out of Accumulated Other Comprehensive Income | Unrealized Gains/Losses on Derivative Instruments
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income before provision for income taxes	(134)	(1,468)	(1,317)	(2,945)
Reclassification out of Accumulated Other Comprehensive Income | Unrealized Gains/Losses on Derivative Instruments | Foreign exchange contracts
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Revenue	131	828	785	1,835
Cost of sales	106	(529)	(419)	(1,450)
Other income (expense), net	(112)	(116)	(123)	327
Reclassification out of Accumulated Other Comprehensive Income | Unrealized Gains/Losses on Derivative Instruments | Interest rate contracts
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other income (expense), net	3	5	10	13
Reclassification out of Accumulated Other Comprehensive Income | Unrealized Gains/Losses on Marketable Securities
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other income (expense), net	$ (20)	$ 3	$ 129	$ 37