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Goodwill and other intangible assets (Identifiable Intangible Assets) (Details) - USD ($) $ in Millions | Mar. 31, 2018 | Dec. 31, 2017
--- | --- | ---
Finite-lived intangible assets: |  |
Gross carrying amount | $ 18,847 | $ 18,344
Accumulated amortization | (10,455) | (10,121)
Intangible assets, net | 8,392 | 8,223
Indefinite-lived intangible assets: |  |
Gross carrying amount | 19,234 | 18,730
Accumulated amortization | (10,455) | (10,121)
Intangible assets, net | 8,779 | 8,609
In-process Research and Development [Member] |  |
Indefinite-lived intangible assets: |  |
Indefinite-lived intangible assets | 387 | 386
Developed-Product-Technology Rights [Member] |  |
Finite-lived intangible assets: |  |
Gross carrying amount | 12,609 | 12,589
Accumulated amortization | (6,974) | (6,796)
Intangible assets, net | 5,635 | 5,793
Licensing Rights [Member] |  |
Finite-lived intangible assets: |  |
Gross carrying amount | 3,745 | 3,275
Accumulated amortization | (1,699) | (1,601)
Intangible assets, net | 2,046 | 1,674
Marketing-Related Intangible Assets [Member] |  |
Finite-lived intangible assets: |  |
Gross carrying amount | 1,316 | 1,319
Accumulated amortization | (948) | (920)
Intangible assets, net | 368 | 399
R&D Technology Rights [Member] |  |
Finite-lived intangible assets: |  |
Gross carrying amount | 1,177 | 1,161
Accumulated amortization | (834) | (804)
Intangible assets, net | $ 343 | $ 357

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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/presentationRef -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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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -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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- Definition Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16212-109274 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph ((a)(1),(b)) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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