Intangible Assets - Components of Intangible Assets (Detail) (USD $) In Millions, unless otherwise specified	Dec. 31, 2014	Sep. 30, 2014
Finite And Indefinite Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 1,297	$ 1,308
Accumulated Amortization	603	594
Unamortized intangible assets, Total	126	46
Acquired In-Process Research and Development [Member]
Finite And Indefinite Lived Intangible Assets [Line Items]
Unamortized intangible assets, Total	124	44
Trademarks [Member]
Finite And Indefinite Lived Intangible Assets [Line Items]
Unamortized intangible assets, Total	2	2
Core and Developed Technology [Member]
Finite And Indefinite Lived Intangible Assets [Line Items]
Gross Carrying Amount	880	893
Accumulated Amortization	384	379
Product Rights [Member]
Finite And Indefinite Lived Intangible Assets [Line Items]
Gross Carrying Amount	141	148
Accumulated Amortization	32	31
Patents, Trademarks, and Other [Member]
Finite And Indefinite Lived Intangible Assets [Line Items]
Gross Carrying Amount	276	268
Accumulated Amortization	$ 187	$ 184

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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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- Definition

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

+ References

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- Definition

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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