Pre-Tax Effect of Derivative Instruments Designated as Cash Flow, Net Investment and Fair Value Hedges (Detail) (USD $) In Millions, unless otherwise specified	12 Months Ended
Sep. 27, 2014	Sep. 28, 2013	Sep. 29, 2012
Cash flow hedges
Derivative Instruments, Gain (Loss) [Line Items]
Gains/ (Losses) Recognized in OCI - Effective Portion	$ 1,735	$ 903	$ (175)
Gains/ (Losses) Reclassified from AOCI into Net Income - Effective Portion	(170)	670	607
Cash flow hedges \| Foreign exchange contracts
Derivative Instruments, Gain (Loss) [Line Items]
Gains/ (Losses) Recognized in OCI - Effective Portion	1,750	891	(175)
Gains/ (Losses) Reclassified from AOCI into Net Income - Effective Portion	(154)	676	607
Cash flow hedges \| Interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Gains/ (Losses) Recognized in OCI - Effective Portion	(15)	12	0
Gains/ (Losses) Reclassified from AOCI into Net Income - Effective Portion	(16)	(6)	0
Net investment hedges \| Foreign exchange contracts
Derivative Instruments, Gain (Loss) [Line Items]
Gains/ (Losses) Recognized in OCI - Effective Portion	53	143	(5)
Gains/ (Losses) Reclassified from AOCI into Net Income - Effective Portion	0	0	0
Fair Value Hedges \| Interest rate contracts
Derivative Instruments, Gain (Loss) [Line Items]
Gains/ (Losses) On Derivative Instruments	39	0	0
Gains/ (Losses) Related to Hedged Items	$ (39)	$ 0	$ 0

Amount of the increase (decrease) in fair value of the hedged item in a fair value hedge recognized in the income statement.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 25

-Section 50

-Paragraph 1

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Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4A

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5618551-113959

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The effective portion of net gain (loss) reclassified from accumulated other comprehensive income into income on derivative instruments designated and qualifying as hedging instruments.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 815

-SubTopic 10

-Section 50

-Paragraph 4C

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624171-113959

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

-Publisher FASB

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The effective portion of gains and losses (net) on derivative instruments designated and qualifying as hedging instruments that was recognized in other comprehensive income during the current period.

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