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Interest in joint venture - Narrative (Details) $ in Millions |  | 9 Months Ended
--- | --- | ---
Dec. 14, 2020 product | Sep. 30, 2023 USD ($)
Disclosure of joint ventures [line items] |  |
Deferred Gain On Investment In Joint Venture | $ |  | $ 23.5
Overland ADCT BioPharma |  |
Disclosure of joint ventures [line items] |  |
Number of product candidates developed and commercialized in joint venture | 3 |
Number of products developed and commercialized in joint venture | 1 |

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- Details
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