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Basis of preparation and statement of compliance - Significant Investments In Subsidiaries (Details) € in Thousands	6 Months Ended	12 Months Ended
	Jun. 30, 2024 EUR (€) entity	Dec. 31, 2023
General principles and statement of compliance
Number of entities being consolidated | entity	2
Hepalys Pharma, Inc
General principles and statement of compliance
Proportion of ownership interest	14.64%	15.00%
Inventiva Inc.
General principles and statement of compliance
Percent of ownership interest	100.00%
Non-controlling interest | €	€ 0

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The amount of equity in a subsidiary not attributable, directly or indirectly, to a parent. [Refer: Subsidiaries [member]]

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