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Goodwill and other intangible assets - Schedule of Other Intangible Assets (Details) - USD ($) $ in Millions | Mar. 31, 2025 | Dec. 31, 2024
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Finite-lived intangible assets: |  |
Gross carrying amounts | $ 54,288 | $ 55,062
Accumulated amortization | (29,624) | (28,423)
Other intangible assets, net | 24,664 | 26,639
Indefinite-lived intangible assets: |  |
Identifiable intangible assets | 55,348 | 56,122
Accumulated amortization | (29,624) | (28,423)
Identifiable intangible assets, net | 25,724 | 27,699
In-process research and development |  |
Indefinite-lived intangible assets: |  |
Indefinite-lived intangible assets | 1,060 | 1,060
Developed-product-technology rights |  |
Finite-lived intangible assets: |  |
Gross carrying amounts | 47,824 | 48,611
Accumulated amortization | (23,743) | (22,594)
Other intangible assets, net | 24,081 | 26,017
Licensing rights |  |
Finite-lived intangible assets: |  |
Gross carrying amounts | 3,875 | 3,875
Accumulated amortization | (3,425) | (3,392)
Other intangible assets, net | 450 | 483
Marketing-related rights |  |
Finite-lived intangible assets: |  |
Gross carrying amounts | 1,202 | 1,202
Accumulated amortization | (1,202) | (1,202)
Other intangible assets, net | 0 | 0
Research and development technology rights |  |
Finite-lived intangible assets: |  |
Gross carrying amounts | 1,387 | 1,374
Accumulated amortization | (1,254) | (1,235)
Other intangible assets, net | $ 133 | $ 139

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