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Goodwill and other intangible assets (Identifiable Intangible Assets) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2022 | Sep. 30, 2021 | Sep. 30, 2022 | Sep. 30, 2021 | Dec. 31, 2021
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Gross carrying amounts | $ 32,028 |  | $ 32,028 |  | $ 32,099
Accumulated amortization | (19,771) |  | (19,771) |  | (17,987)
Other intangible assets, net | 12,257 |  | 12,257 |  | 14,112
Gross carrying amount | 33,037 |  | 33,037 |  | 33,169
Accumulated amortization | (19,771) |  | (19,771) |  | (17,987)
Intangible assets, net | 13,266 |  | 13,266 |  | 15,182
Amortization charges associated with finite-lived intangible assets | 628 | $ 642 | 1,900 | $ 1,900 |
In-process research and development |  |  |  |  |
Indefinite-lived Intangible Assets [Line Items] |  |  |  |  |
Indefinite-lived intangible assets: | 1,009 |  | 1,009 |  | 1,070
Developed-product-technology rights |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Gross carrying amounts | 25,504 |  | 25,504 |  | 25,561
Accumulated amortization | (14,396) |  | (14,396) |  | (12,769)
Other intangible assets, net | 11,108 |  | 11,108 |  | 12,792
Licensing rights |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Gross carrying amounts | 3,864 |  | 3,864 |  | 3,807
Accumulated amortization | (3,087) |  | (3,087) |  | (2,973)
Other intangible assets, net | 777 |  | 777 |  | 834
Marketing-related rights |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Gross carrying amounts | 1,326 |  | 1,326 |  | 1,354
Accumulated amortization | (1,146) |  | (1,146) |  | (1,112)
Other intangible assets, net | 180 |  | 180 |  | 242
Research and development technology rights |  |  |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |  |  |
Gross carrying amounts | 1,334 |  | 1,334 |  | 1,377
Accumulated amortization | (1,142) |  | (1,142) |  | (1,133)
Other intangible assets, net | $ 192 |  | $ 192 |  | $ 244

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