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Share-based payments - Schedule of Number and Weighted Average Remaining Contractual Life of Outstanding Other Equity Instruments (Details)	Jun. 30, 2025 shares
Disclosure of number and weighted average remaining contractual life of other equity instruments outstanding
Total number of awards outstanding (in shares)	5,158,881
BSPCE
Disclosure of number and weighted average remaining contractual life of other equity instruments outstanding
Total number of awards outstanding (in shares)	371,967
BSA
Disclosure of number and weighted average remaining contractual life of other equity instruments outstanding
Total number of awards outstanding (in shares)	56,251
OSA
Disclosure of number and weighted average remaining contractual life of other equity instruments outstanding
Total number of share options outstanding (in shares)	4,730,663

X

- Definition

The number of other equity instruments (ie other than share options) outstanding in a share-based payment arrangement.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-IssueDate 2025-01-01
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-URIDate 2025-03-27

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- Definition

The number of share options outstanding in a share-based payment arrangement.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
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-IssueDate 2025-01-01
-Paragraph 45
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-URIDate 2025-03-27

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Note Effective 2027-01-01
-Name IFRS
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