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Goodwill and other intangible assets (Tables) | 3 Months Ended
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Mar. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of goodwill | The change in the carrying amount of goodwill was as follows (in millions):
| Three months ended March 31, 2019
Beginning balance | $ | 14,699 |
Currency translation adjustment | (7 | )
Ending balance | $ | 14,692 |
Schedule of identifiable intangible assets | Other intangible assets consisted of the following (in millions):
| March 31, 2019 |  | December 31, 2018
| 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 | $ | 12,559 |  |  | $ | (7,639 | ) |  | $ | 4,920 |  |  | $ | 12,573 |  |  | $ | (7,479 | ) |  | $ | 5,094 |
Licensing rights | 3,693 |  |  | (2,064 | ) |  | 1,629 |  |  | 3,772 |  |  | (2,032 | ) |  | 1,740 |
Marketing-related rights | 1,211 |  |  | (947 | ) |  | 264 |  |  | 1,297 |  |  | (1,019 | ) |  | 278 |
Research and development technology rights | 1,145 |  |  | (889 | ) |  | 256 |  |  | 1,148 |  |  | (872 | ) |  | 276 |
Total finite-lived intangible assets | 18,608 |  |  | (11,539 | ) |  | 7,069 |  |  | 18,790 |  |  | (11,402 | ) |  | 7,388 |
Indefinite-lived intangible assets: |  |  |  |  |  |  |  |  |  |  |
In-process research and development | 55 |  |  | — |  |  | 55 |  |  | 55 |  |  | — |  |  | 55 |
Total other intangible assets | $ | 18,663 |  |  | $ | (11,539 | ) |  | $ | 7,124 |  |  | $ | 18,845 |  |  | $ | (11,402 | ) |  | $ | 7,443 |

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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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