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Intangible assets (Tables) | 3 Months Ended
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Mar. 31, 2020
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Finite-Lived Intangible Assets | The following tables summarize the Company's intangible assets for the periods ended March 31, 2020 and December 31, 2019:
|  |  | March 31, 2020
(in millions) | Estimated Life |  | Cost | Additions | Accumulated Amortization | Net
Products | 9-22 years |  | $ | 788.0 |  | $ | 10.0 |  | $ | 96.0 |  | $ | 702.0 |
Customer relationships | 8 years |  | 28.6 |  | — |  | 23.8 |  | 4.8 |
Contract development and manufacturing | 8 years |  | 5.5 |  | — |  | 4.2 |  | 1.3 |
Total intangible assets |  |  | $ | 822.1 |  | $ | 10.0 |  | $ | 124.0 |  | $ | 708.1 |
|  |  | December 31, 2019
(in millions) | Estimated Life |  | Cost | Accumulated Amortization | Net
Products | 9-22 years |  | $ | 788.0 |  | $ | 82.2 |  | $ | 705.8 |
Customer relationships | 8 years |  | 28.6 |  | 23.0 |  | $ | 5.6 |
Contract development and manufacturing | 8 years |  | 5.5 |  | 4.0 |  | $ | 1.5 |
Total intangible assets |  |  | $ | 822.1 |  | $ | 109.2 |  | $ | 712.9 |

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- Definition Tabular disclosure of assets, excluding financial assets and goodwill, lacking physical substance with a finite life, by either major class or business segment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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