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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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Deferred Gain On Investment In Joint Venture

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Number Of Product Candidates Developed And Commercialized In Joint Venture

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Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

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