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Intangible Assets - Components of Intangible Assets (Detail) - USD ($) $ in Millions | Dec. 31, 2022 | Sep. 30, 2022
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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

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- Definition 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) -URI https://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(16)) -URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
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