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Impairment of intangible assets and property, plant and equipment - Additional Information (Details) - EUR (€) | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Disclosure of impairment loss and reversal of impairment loss [line items] |  |  |
Impairment of goodwill recognized | € 0 | € 0 | € 0
Bottom of range |  |  |
Disclosure of impairment loss and reversal of impairment loss [line items] |  |  |
After tax discount rates | 7.25% |  |
Top of range |  |  |
Disclosure of impairment loss and reversal of impairment loss [line items] |  |  |
After tax discount rates | 8.25% |  |
Opella (discontinued operation, see Note D.1.) | Cash-generating units |  |  |
Disclosure of impairment loss and reversal of impairment loss [line items] |  |  |
Rate used for Impairment of goodwill | 7.25% |  |
Biopharma (operating segment) | Goodwill |  |  |
Disclosure of impairment loss and reversal of impairment loss [line items] |  |  |
Perpetual growth rates applied to future cash flows | 0.00% |  |
Biopharma (operating segment) | Cash-generating units |  |  |
Disclosure of impairment loss and reversal of impairment loss [line items] |  |  |
Pre-tax discount rates | 9.80% |  |

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- Definition The growth rate used to extrapolate cash flow projections beyond the period covered by the most recent budgets/forecasts for a cash-generating unit (group of units). [Refer: Cash-generating units [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2023-01-01 -Paragraph 134 -Subparagraph d -Clause iv -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=36&code=ifrs-tx-2023-en-r&anchor=para_134_d_iv&doctype=Standard -URIDate 2023-03-23 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 36 -IssueDate 2023-01-01 -Paragraph 134 -Subparagraph e -Clause iv -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=36&code=ifrs-tx-2023-en-r&anchor=para_134_e_iv&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The amount of impairment loss recognised in profit or loss for goodwill. [Refer: Impairment loss recognised in profit or loss; Goodwill] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 3 -IssueDate 2023-01-01 -Paragraph B67 -Subparagraph d -Clause v -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2023-en-r&anchor=para_B67_d_v&doctype=Appendix&subtype=B -URIDate 2023-03-23 + Details
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