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Goodwill and other intangible assets - Schedule of Identifiable Intangible Assets (Details) - USD ($) $ in Millions | Sep. 30, 2024 | Dec. 31, 2023
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Finite-lived intangible assets: |  |
Gross carrying amounts | $ 55,103 | $ 55,229
Accumulated amortization | (27,273) | (23,806)
Other intangible assets, net | 27,830 | 31,423
Indefinite-lived intangible assets: |  |
Identifiable intangible assets | 56,193 | 56,447
Accumulated amortization | (27,273) | (23,806)
Intangible assets, net | 28,920 | 32,641
In-process research and development |  |
Indefinite-lived intangible assets: |  |
Indefinite-lived intangible assets | 1,090 | 1,218
Developed-product-technology rights |  |
Finite-lived intangible assets: |  |
Gross carrying amounts | 48,636 | 48,631
Accumulated amortization | (21,472) | (18,049)
Other intangible assets, net | 27,164 | 30,582
Licensing rights |  |
Finite-lived intangible assets: |  |
Gross carrying amounts | 3,864 | 3,865
Accumulated amortization | (3,360) | (3,265)
Other intangible assets, net | 504 | 600
Marketing-related rights |  |
Finite-lived intangible assets: |  |
Gross carrying amounts | 1,203 | 1,339
Accumulated amortization | (1,188) | (1,264)
Other intangible assets, net | 15 | 75
Research and development technology rights |  |
Finite-lived intangible assets: |  |
Gross carrying amounts | 1,400 | 1,394
Accumulated amortization | (1,253) | (1,228)
Other intangible assets, net | $ 147 | $ 166

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