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Goodwill and other intangible assets - Schedule of Identifiable Intangible Assets (Details) - USD ($) $ in Millions | Mar. 31, 2024 | Dec. 31, 2023
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Finite-lived intangible assets: |  |
Gross carrying amounts | $ 55,080 | $ 55,229
Accumulated amortization | (24,858) | (23,806)
Other intangible assets, net | 30,222 | 31,423
Indefinite-lived intangible assets: |  |
Identifiable intangible assets | 56,230 | 56,447
Accumulated amortization | (24,858) | (23,806)
Intangible assets, net | 31,372 | 32,641
In-process research and development |  |
Indefinite-lived intangible assets: |  |
Indefinite-lived intangible assets | 1,150 | 1,218
Developed-product-technology rights |  |
Finite-lived intangible assets: |  |
Gross carrying amounts | 48,625 | 48,631
Accumulated amortization | (19,184) | (18,049)
Other intangible assets, net | 29,441 | 30,582
Licensing rights |  |
Finite-lived intangible assets: |  |
Gross carrying amounts | 3,864 | 3,865
Accumulated amortization | (3,297) | (3,265)
Other intangible assets, net | 567 | 600
Marketing-related rights |  |
Finite-lived intangible assets: |  |
Gross carrying amounts | 1,203 | 1,339
Accumulated amortization | (1,148) | (1,264)
Other intangible assets, net | 55 | 75
Research and development technology rights |  |
Finite-lived intangible assets: |  |
Gross carrying amounts | 1,388 | 1,394
Accumulated amortization | (1,229) | (1,228)
Other intangible assets, net | $ 159 | $ 166

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