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Goodwill and other intangible assets (Tables) | 3 Months Ended
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Mar. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of goodwill | Changes in the carrying amount of goodwill were as follows (in millions):
| Three months ended March 31, 2018
Beginning balance | $ | 14,761 |
Addition from K-A acquisition | 6 |
Currency translation adjustment | 4 |
Ending balance | $ | 14,771 |
Schedule of identifiable intangible assets | Other intangible assets consisted of the following (in millions):
| March 31, 2018 |  | December 31, 2017
| Gross carrying amount |  | Accumulated amortization |  | Intangible assets, net |  | Gross carrying amount |  | Accumulated amortization |  | Intangible assets, net
Finite-lived intangible assets: |  |  |  |  |  |  |  |  |  |  |
Developed-product-technology rights | $ | 12,609 |  |  | $ | (6,974 | ) |  | $ | 5,635 |  |  | $ | 12,589 |  |  | $ | (6,796 | ) |  | $ | 5,793 |
Licensing rights | 3,745 |  |  | (1,699 | ) |  | 2,046 |  |  | 3,275 |  |  | (1,601 | ) |  | 1,674 |
Marketing-related rights | 1,316 |  |  | (948 | ) |  | 368 |  |  | 1,319 |  |  | (920 | ) |  | 399 |
R&D technology rights | 1,177 |  |  | (834 | ) |  | 343 |  |  | 1,161 |  |  | (804 | ) |  | 357 |
Total finite-lived intangible assets | 18,847 |  |  | (10,455 | ) |  | 8,392 |  |  | 18,344 |  |  | (10,121 | ) |  | 8,223 |
Indefinite-lived intangible assets: |  |  |  |  |  |  |  |  |  |  |
In-process research and development | 387 |  |  | — |  |  | 387 |  |  | 386 |  |  | — |  |  | 386 |
Total other intangible assets | $ | 19,234 |  |  | $ | (10,455 | ) |  | $ | 8,779 |  |  | $ | 18,730 |  |  | $ | (10,121 | ) |  | $ | 8,609 |

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- Definition Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13854-109267 + Details
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