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Goodwill and other intangible assets (Identifiable Intangible Assets) (Details) - USD ($) $ in Millions | Sep. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Finite-Lived Intangible Assets [Line Items] |  |
Gross carrying amounts | $ 18,784 | $ 18,790
Accumulated amortization | (12,158) | (11,402)
Other intangible assets, net | 6,626 | 7,388
Gross carrying amount | 18,860 | 18,845
Accumulated amortization | (12,158) | (11,402)
Intangible assets, net | 6,702 | 7,443
In-process Research and Development |  |
Indefinite-lived Intangible Assets [Line Items] |  |
Indefinite-lived intangible assets | 76 | 55
Developed-Product-Technology Rights [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross carrying amounts | 12,548 | 12,573
Accumulated amortization | (7,978) | (7,479)
Other intangible assets, net | 4,570 | 5,094
Licensing Rights [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross carrying amounts | 3,761 | 3,772
Accumulated amortization | (2,286) | (2,032)
Other intangible assets, net | 1,475 | 1,740
Marketing-Related Rights [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross carrying amounts | 1,209 | 1,297
Accumulated amortization | (972) | (1,019)
Other intangible assets, net | 237 | 278
Research and Development Technology Rights [Member] |  |
Finite-Lived Intangible Assets [Line Items] |  |
Gross carrying amounts | 1,266 | 1,148
Accumulated amortization | (922) | (872)
Other intangible assets, net | $ 344 | $ 276

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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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