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Goodwill and other intangible assets - Identifiable Intangible Assets (Details) - USD ($) $ in Millions | Sep. 30, 2023 | Dec. 31, 2022
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Finite-Lived Intangible Assets [Line Items] |  |
Gross carrying amounts | $ 35,608 | $ 35,596
Accumulated amortization | (22,616) | (20,525)
Other intangible assets, net | 12,992 | 15,071
Gross carrying amount | 35,766 | 36,605
Accumulated amortization | (22,616) | (20,525)
Intangible assets, net | 13,150 | 16,080
In-process research and development |  |
Indefinite-lived Intangible Assets [Line Items] |  |
Indefinite-lived intangible assets: | 158 | 1,009
Developed-product-technology rights |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross carrying amounts | 29,028 | 29,028
Accumulated amortization | (16,931) | (15,045)
Other intangible assets, net | 12,097 | 13,983
Licensing rights |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross carrying amounts | 3,864 | 3,864
Accumulated amortization | (3,233) | (3,123)
Other intangible assets, net | 631 | 741
Marketing-related rights |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross carrying amounts | 1,339 | 1,326
Accumulated amortization | (1,243) | (1,167)
Other intangible assets, net | 96 | 159
Research and development technology rights |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross carrying amounts | 1,377 | 1,378
Accumulated amortization | (1,209) | (1,190)
Other intangible assets, net | $ 168 | $ 188

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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 -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(16)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482665/350-30-50-2 + Details
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