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Accumulated change in equity from transactions and other events and circumstances from non-owner sources, net of tax effect, at period end. Excludes Net Income (Loss), and accumulated changes in equity from transactions resulting from investments by owners and distributions to owners. Includes foreign currency translation items, certain pension adjustments, unrealized gains and losses on certain investments in debt and equity securities, other than temporary impairment (OTTI) losses related to factors other than credit losses on available-for-sale and held-to-maturity debt securities that an entity does not intend to sell and it is not more likely than not that the entity will be required to sell before recovery of the amortized cost basis, as well as changes in the fair value of derivatives related to the effective portion of a designated cash flow hedge.

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

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Amount after tax and reclassification adjustments of other comprehensive income (loss).

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Amount of tax expense (benefit) allocated to other comprehensive income (loss).

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

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Change in Accumulated Other Comprehensive Income by Component (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Sep. 27, 2014	Sep. 28, 2013	Sep. 29, 2012
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	$ (471)
Other comprehensive income/(loss) before reclassifications	1,938
Amounts reclassified from AOCI	(20)
Tax effect	(365)us-gaap_OtherComprehensiveIncomeLossTax
Total other comprehensive income/(loss)	1,553	(970)	56
Ending balance	1,082	(471)
Cumulative Foreign Currency Translation
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(105)
Other comprehensive income/(loss) before reclassifications	(187)
Amounts reclassified from AOCI	0
Tax effect	50
Total other comprehensive income/(loss)	(137)
Ending balance	(242)
Unrecognized Gains/Losses on Derivative Instruments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(175)
Other comprehensive income/(loss) before reclassifications	1,687
Amounts reclassified from AOCI	185
Tax effect	(333)
Total other comprehensive income/(loss)	1,539
Ending balance	1,364
Unrealized Gains/Losses on Marketable Securities
Accumulated Other Comprehensive Income (Loss) [Line Items]
Beginning balance	(191)
Other comprehensive income/(loss) before reclassifications	438
Amounts reclassified from AOCI	(205)
Tax effect	(82)
Total other comprehensive income/(loss)	151
Ending balance	$ (40)