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Goodwill and intangible assets (Tables) | 12 Months Ended
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Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of goodwill | The changes in the carrying amounts of goodwill were as follows (in millions):
| Years ended December 31,
| 2018 |  | 2017
Beginning balance | $ | 14,761 |  |  | $ | 14,751 |
Addition from K-A acquisition | 6 |  |  | — |
Currency translation adjustments | (68 | ) |  | 10 |
Ending balance | $ | 14,699 |  |  | $ | 14,761 |
Schedule of identifiable intangible assets | Other intangible assets consisted of the following (in millions):
| December 31,
| 2018 |  | 2017
| Gross carrying amounts |  | Accumulated amortization |  | Other intangible assets, net |  | Gross carrying amounts |  | Accumulated amortization |  | Other intangible assets, net
Finite-lived intangible assets: |  |  |  |  |  |  |  |  |  |  |
Developed-product-technology rights | $ | 12,573 |  |  | $ | (7,479 | ) |  | $ | 5,094 |  |  | $ | 12,589 |  |  | $ | (6,796 | ) |  | $ | 5,793 |
Licensing rights | 3,772 |  |  | (2,032 | ) |  | 1,740 |  |  | 3,275 |  |  | (1,601 | ) |  | 1,674 |
Marketing-related rights | 1,297 |  |  | (1,019 | ) |  | 278 |  |  | 1,319 |  |  | (920 | ) |  | 399 |
R&D technology rights | 1,148 |  |  | (872 | ) |  | 276 |  |  | 1,161 |  |  | (804 | ) |  | 357 |
Total finite-lived intangible assets | 18,790 |  |  | (11,402 | ) |  | 7,388 |  |  | 18,344 |  |  | (10,121 | ) |  | 8,223 |
Indefinite-lived intangible assets: |  |  |  |  |  |  |  |  |  |  |
IPR&D | 55 |  |  | — |  |  | 55 |  |  | 386 |  |  | — |  |  | 386 |
Total other intangible assets | $ | 18,845 |  |  | $ | (11,402 | ) |  | $ | 7,443 |  |  | $ | 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13854-109267 + Details
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