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Goodwill and other intangible assets (Identifiable Intangible Assets) (Details) - USD ($) $ in Millions | Jun. 30, 2020 | Dec. 31, 2019
--- | --- | ---
Finite-Lived Intangible Assets [Line Items] |  |
Gross carrying amounts | $ 31,955 | $ 31,991
Accumulated amortization | (14,037) | (12,632)
Other intangible assets, net | 17,918 | 19,359
Gross carrying amount | 31,985 | 32,045
Accumulated amortization | (14,037) | (12,632)
Intangible assets, net | 17,948 | 19,413
In-process Research and Development [Member] |  |
Indefinite-lived Intangible Assets [Line Items] |  |
Indefinite-lived intangible assets | 30 | 54
Developed-Product-Technology Rights [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross carrying amounts | 25,559 | 25,575
Accumulated amortization | (9,436) | (8,322)
Other intangible assets, net | 16,123 | 17,253
Licensing Rights [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross carrying amounts | 3,746 | 3,761
Accumulated amortization | (2,602) | (2,398)
Other intangible assets, net | 1,144 | 1,363
Marketing-Related Rights [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross carrying amounts | 1,371 | 1,382
Accumulated amortization | (1,003) | (965)
Other intangible assets, net | 368 | 417
Research and Development Technology Rights [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross carrying amounts | 1,279 | 1,273
Accumulated amortization | (996) | (947)
Other intangible assets, net | $ 283 | $ 326

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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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