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Goodwill and other intangible assets - Identifiable Intangible Assets (Details) - USD ($) $ in Millions | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Finite-lived intangible assets: |  |
Gross carrying amounts | $ 31,991 | $ 18,790
Accumulated amortization | (12,632) | (11,402)
Other intangible assets, net | 19,359 | 7,388
Indefinite-lived intangible assets: |  |
Identifiable intangible assets | 32,045 | 18,845
Accumulated amortization | (12,632) | (11,402)
Identifiable intangible assets, net | 19,413 | 7,443
IPR&D [Member] |  |
Indefinite-lived intangible assets: |  |
Indefinite-lived intangible assets | 54 | 55
Developed Technology Rights |  |
Finite-lived intangible assets: |  |
Gross carrying amounts | 25,575 | 12,573
Accumulated amortization | (8,322) | (7,479)
Other intangible assets, net | 17,253 | 5,094
Licensing rights |  |
Finite-lived intangible assets: |  |
Gross carrying amounts | 3,761 | 3,772
Accumulated amortization | (2,398) | (2,032)
Other intangible assets, net | 1,363 | 1,740
Marketing-related rights [Member] |  |
Finite-lived intangible assets: |  |
Gross carrying amounts | 1,382 | 1,297
Accumulated amortization | (965) | (1,019)
Other intangible assets, net | 417 | 278
R&D technology rights [Member] |  |
Finite-lived intangible assets: |  |
Gross carrying amounts | 1,273 | 1,148
Accumulated amortization | (947) | (872)
Other intangible assets, net | $ 326 | $ 276

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