Components of Gross and Net Intangible Asset Balances (Detail) (USD $) In Millions, unless otherwise specified	Mar. 28, 2015	Sep. 27, 2014
Acquired Intangible Assets Including Goodwill [Line Items]
Definite-lived and amortizable acquired intangible assets, Gross Carrying Amount	$ 7,672	$ 7,127
Definite-lived and amortizable acquired intangible assets, Accumulated Amortization	(3,711)	(3,085)
Definite-lived and amortizable acquired intangible assets, Net Carrying Amount	3,961us-gaap_FiniteLivedIntangibleAssetsNet	4,042us-gaap_FiniteLivedIntangibleAssetsNet
Indefinite-lived and non-amortizable acquired intangible assets	100	100
Total acquired intangible assets, Net Carrying Amount	$ 4,061	$ 4,142

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Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275

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Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

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Amount of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275

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Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16212-109274

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph ((a)(1),(b))

-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275

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