Pre-tax Amounts Reclassified from AOCI into Condensed Consolidated Statements of Operations (Detail) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Mar. 26, 2016	Mar. 28, 2015	Mar. 26, 2016	Mar. 28, 2015
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Unrealized (gains)/losses on derivative instruments reclassified from AOCI	$ (672)	$ (814)	$ (1,183)	$ (1,477)
Unrealized (gains)/losses on marketable securities reclassified from AOCI	76	56	149	34
Total amounts reclassified from AOCI	(596)	(758)	(1,034)	(1,443)
Foreign exchange contracts \| Revenue
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Unrealized (gains)/losses on derivative instruments reclassified from AOCI	(325)	(558)	(654)	(1,007)
Foreign exchange contracts \| Cost of sales
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Unrealized (gains)/losses on derivative instruments reclassified from AOCI	(219)	(608)	(525)	(921)
Foreign exchange contracts \| Other income/(expense), net
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Unrealized (gains)/losses on derivative instruments reclassified from AOCI	(131)	348	(11)	443
Interest rate contracts \| Other income/(expense), net
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Unrealized (gains)/losses on derivative instruments reclassified from AOCI	$ 3	$ 4	$ 7	$ 8

Amount before tax of reclassification adjustment from accumulated other comprehensive income for unrealized gain (loss) realized upon the sale of available-for-sale securities.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 15
-URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e689-108580

Reference 2: http://www.xbrl.org/2003/role/presentationRef
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Reference 1: http://www.xbrl.org/2003/role/presentationRef
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