Other Intangible Assets and Goodwill - Summary of Goodwill Recognized (Details) - EUR (€) € in Millions |
Dec. 31, 2025 |
Dec. 31, 2024 |
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| Disclosure of detailed information about intangible assets [line items] | ||
| Goodwill | € 367.9 | € 380.6 |
| Intangible assets with indefinite useful life | 474.3 | 486.5 |
| Total | 842.2 | 867.1 |
| CGU Immunotherapies | ||
| Disclosure of detailed information about intangible assets [line items] | ||
| Goodwill | 358.3 | 369.8 |
| Intangible assets with indefinite useful life | 474.3 | 486.5 |
| Total | 832.6 | 856.3 |
| CGU External Product Sales of JPT | ||
| Disclosure of detailed information about intangible assets [line items] | ||
| Goodwill | 0.0 | 0.5 |
| Intangible assets with indefinite useful life | 0.0 | 0.0 |
| Total | 0.0 | 0.5 |
| CGU External Business of InstaDeep | ||
| Disclosure of detailed information about intangible assets [line items] | ||
| Goodwill | 9.6 | 10.3 |
| Intangible assets with indefinite useful life | 0.0 | 0.0 |
| Total | € 9.6 | € 10.3 |
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- Definition Intangible Assets With Indefinite Useful Life And Goodwill No definition available.
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- Definition 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. No definition available.
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- Definition The amount of assets representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognised. [Refer: Total for all business combinations [member]] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The amount of intangible assets assessed as having an indefinite useful life. [Refer: Intangible assets other than goodwill] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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