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Intangible Assets - Components of Intangible Assets (Detail) - USD ($) $ in Millions | Sep. 30, 2022 | Sep. 30, 2021
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Finite And Indefinite Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | $ 20,987 | $ 20,106
Accumulated Amortization | (8,723) | (7,381)
Finite-Lived Intangible Assets, Net | 12,264 | 12,726
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 | 15,087 | 14,399
Accumulated Amortization | (5,979) | (4,983)
Finite-Lived Intangible Assets, Net | 9,108 | 9,417
Customer relationships |  |
Finite And Indefinite Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 4,853 | 4,653
Accumulated Amortization | (2,170) | (1,838)
Finite-Lived Intangible Assets, Net | 2,683 | 2,815
Product rights |  |
Finite And Indefinite Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 97 | 123
Accumulated Amortization | (72) | (83)
Finite-Lived Intangible Assets, Net | 25 | 40
Trademarks |  |
Finite And Indefinite Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 408 | 409
Accumulated Amortization | (155) | (137)
Finite-Lived Intangible Assets, Net | 253 | 271
Patents and other |  |
Finite And Indefinite Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 542 | 523
Accumulated Amortization | (346) | (339)
Finite-Lived Intangible Assets, Net | $ 196 | $ 184

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