Intangible Assets - Components of Intangible Assets (Detail) - USD ($) $ in Millions	Dec. 31, 2022	Sep. 30, 2022
Finite And Indefinite Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 21,059	$ 20,987
Accumulated Amortization	(9,116)	(8,723)
Net Carrying Amount	11,943	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	15,136	15,087
Accumulated Amortization	(6,262)	(5,979)
Net Carrying Amount	8,874	9,108
Customer relationships
Finite And Indefinite Lived Intangible Assets [Line Items]
Gross Carrying Amount	4,859	4,853
Accumulated Amortization	(2,260)	(2,170)
Net Carrying Amount	2,599	2,683
Product rights
Finite And Indefinite Lived Intangible Assets [Line Items]
Gross Carrying Amount	104	97
Accumulated Amortization	(79)	(72)
Net Carrying Amount	25	25
Trademarks
Finite And Indefinite Lived Intangible Assets [Line Items]
Gross Carrying Amount	408	408
Accumulated Amortization	(160)	(155)
Net Carrying Amount	248	253
Patents and other
Finite And Indefinite Lived Intangible Assets [Line Items]
Gross Carrying Amount	552	542
Accumulated Amortization	(355)	(346)
Net Carrying Amount	$ 197	$ 196

Finite And Indefinite Lived Intangible Assets [Line Items]

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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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (a)(1)
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-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
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-Section S99
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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
-Publisher FASB
-Name Accounting Standards Codification
-Topic 928
-SubTopic 340
-Section 50
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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
-Publisher FASB
-Name Accounting Standards Codification
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-SubTopic 20
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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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