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Liabilities related to business combinations and to non-controlling interests - Additional Information (Details) - EUR (€) € in Millions | Jun. 30, 2026 | Dec. 31, 2025
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Disclosure Of Liabilities Related To Business Combinations And To Noncontrolling Interests [Line Items] |  |
Fair value of contingent consideration payable | € 652 | € 585
Shire contingent consideration arising from acquisition of Translate Bio |  |
Disclosure Of Liabilities Related To Business Combinations And To Noncontrolling Interests [Line Items] |  |
Fair value of contingent consideration payable | € 585 | € 531
Increase in fair value of liability | 13.00% |

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- Definition The amount of contingent liabilities recognised in a business combination. [Refer: Classes of contingent liabilities [domain]; Total for all business combinations [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 3 -IssueDate 2025-01-01 -Paragraph B67 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=3&code=ifrs-tx-2025-en-r&anchor=para_B67_c&doctype=Appendix&subtype=B -URIDate 2025-03-27 + Details
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- Definition Disclosure Of Liabilities Related To Business Combinations And To Noncontrolling Interests [line items] + References No definition available. + Details
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- Definition Percentage increase in fair value liabilities. + References No definition available. + Details
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- Details
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