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Intangible Assets - Components of Intangible Assets (Detail) - USD ($) $ in Millions	Sep. 30, 2023	Sep. 30, 2022
Finite And Indefinite Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 21,069	$ 20,987
Accumulated Amortization	(10,168)	(8,723)
Finite-Lived Intangible Assets, Net	10,901	12,264
Unamortized intangible assets	46	46
Acquired in-process research and development
Finite And Indefinite Lived Intangible Assets [Line Items]
Unamortized intangible assets	44	44
Trademarks
Finite And Indefinite Lived Intangible Assets [Line Items]
Unamortized intangible assets	2	2
Developed technology
Finite And Indefinite Lived Intangible Assets [Line Items]
Gross Carrying Amount	15,080	15,087
Accumulated Amortization	(7,023)	(5,979)
Finite-Lived Intangible Assets, Net	8,058	9,108
Customer relationships
Finite And Indefinite Lived Intangible Assets [Line Items]
Gross Carrying Amount	4,859	4,853
Accumulated Amortization	(2,521)	(2,170)
Finite-Lived Intangible Assets, Net	2,338	2,683
Patents, trademarks and other
Finite And Indefinite Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,130	1,046
Accumulated Amortization	(624)	(574)
Finite-Lived Intangible Assets, Net	$ 505	$ 473

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- Definition

Finite And Indefinite Lived Intangible Assets [Line Items]

+ References

No definition available.

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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/disclosureRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(16))
-Publisher FASB
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-Topic 350
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- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 928
-SubTopic 340
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
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Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 926
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147483154/926-20-50-5

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

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