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Goodwill and other intangible assets - Schedule of Other Intangible Assets (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
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Finite-lived intangible assets: |  |
Gross carrying amounts | $ 55,062 | $ 55,229
Accumulated amortization | (28,423) | (23,806)
Other intangible assets, net | 26,639 | 31,423
Indefinite-lived intangible assets: |  |
Identifiable intangible assets | 56,122 | 56,447
Accumulated amortization | (28,423) | (23,806)
Identifiable intangible assets, net | 27,699 | 32,641
In-process research and development |  |
Indefinite-lived intangible assets: |  |
Indefinite-lived intangible assets | 1,060 | 1,218
Developed-product-technology rights |  |
Finite-lived intangible assets: |  |
Gross carrying amounts | 48,611 | 48,631
Accumulated amortization | (22,594) | (18,049)
Other intangible assets, net | 26,017 | 30,582
Licensing rights |  |
Finite-lived intangible assets: |  |
Gross carrying amounts | 3,875 | 3,865
Accumulated amortization | (3,392) | (3,265)
Other intangible assets, net | 483 | 600
Marketing-related rights |  |
Finite-lived intangible assets: |  |
Gross carrying amounts | 1,202 | 1,339
Accumulated amortization | (1,202) | (1,264)
Other intangible assets, net | 0 | 75
R&D technology rights |  |
Finite-lived intangible assets: |  |
Gross carrying amounts | 1,374 | 1,394
Accumulated amortization | (1,235) | (1,228)
Other intangible assets, net | $ 139 | $ 166

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