Comprehensive Income - Change in Accumulated Other Comprehensive Income by Component (Detail) - USD ($) $ in Millions	12 Months Ended
Sep. 24, 2016	Sep. 26, 2015
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balances	$ 119,355	$ 111,547
Other comprehensive income/(loss) before reclassifications	2,526	1,987
Amounts reclassified from AOCI	(785)	(4,036)
Tax effect	(762)	622
Other comprehensive income/(loss)	979	(1,427)
Ending Balances	128,249	119,355
Cumulative Foreign Currency Translation
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balances	(653)	(242)
Other comprehensive income/(loss) before reclassifications	67	(612)
Amounts reclassified from AOCI	0	0
Tax effect	8	201
Other comprehensive income/(loss)	75	(411)
Ending Balances	(578)	(653)
Unrealized Gains/Losses on Derivative Instruments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balances	772	1,364
Other comprehensive income/(loss) before reclassifications	14	3,346
Amounts reclassified from AOCI	(872)	(4,127)
Tax effect	124	189
Other comprehensive income/(loss)	(734)	(592)
Ending Balances	38	772
Unrealized Gains/Losses on Marketable Securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balances	(464)	(40)
Other comprehensive income/(loss) before reclassifications	2,445	(747)
Amounts reclassified from AOCI	87	91
Tax effect	(894)	232
Other comprehensive income/(loss)	1,638	(424)
Ending Balances	1,174	(464)
Accumulated Other Comprehensive Income/(Loss)
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning Balances	(345)	1,082
Ending Balances	$ 634	$ (345)

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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Amount before tax and reclassification adjustments of other comprehensive income (loss) attributable to parent.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section 45
-Paragraph 14A
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Amount after tax of other comprehensive income (loss) attributable to parent entity.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
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-Paragraph 1A
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Amount of tax expense (benefit) allocated to other comprehensive income (loss) attributable to parent entity.

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Amount before tax of reclassification adjustments of other comprehensive income (loss) attributable to parent.

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Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
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