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Goodwill and other intangible assets (Identifiable Intangible Assets) (Details) - USD ($) $ in Millions | Sep. 30, 2017 | Dec. 31, 2016
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Finite-lived intangible assets: |  |
Gross carrying amount | $ 18,344 | $ 18,264
Accumulated amortization | (9,827) | (8,744)
Intangible assets, net | 8,517 | 9,520
Indefinite-lived intangible assets: |  |
Gross carrying amount | 18,700 | 19,023
Accumulated amortization | (9,827) | (8,744)
Intangible assets, net | 8,873 | 10,279
IPR&D [Member] |  |
Indefinite-lived intangible assets: |  |
Indefinite-lived intangible assets | 356 | 759
Developed Product Technology Rights [Member] |  |
Finite-lived intangible assets: |  |
Gross carrying amount | 12,585 | 12,534
Accumulated amortization | (6,624) | (5,947)
Intangible assets, net | 5,961 | 6,587
Licensing Rights [Member] |  |
Finite-lived intangible assets: |  |
Gross carrying amount | 3,275 | 3,275
Accumulated amortization | (1,525) | (1,300)
Intangible assets, net | 1,750 | 1,975
Marketing-Related Intangible Assets [Member] |  |
Finite-lived intangible assets: |  |
Gross carrying amount | 1,326 | 1,333
Accumulated amortization | (895) | (793)
Intangible assets, net | 431 | 540
Research and Development Technology Rights [Member] |  |
Finite-lived intangible assets: |  |
Gross carrying amount | 1,158 | 1,122
Accumulated amortization | (783) | (704)
Intangible assets, net | $ 375 | $ 418

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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 Amount after 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 of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit. + 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 (b) -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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