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Retirement obligations - Disclosure of Sensitivity Analysis for Actuarial Assumptions (Details) - EUR (€) € in Thousands	Dec. 31, 2024	Dec. 31, 2023
Disclosure of sensitivity analysis for actuarial assumptions [line items]
Actuarial assumption of discount rates if rates decrease by 25%	3.31%
Discount rate	3.56%	3.30%
Actuarial assumption of discount rates if rates increase by 25%	3.81%
Actuarial assumption of discount rates
Disclosure of sensitivity analysis for actuarial assumptions [line items]
Net defined benefit liability if actuarial assumption of discount rates decrease by 25%	€ 451
Net defined benefit liability	432
Net defined benefit liability if actuarial assumption of discount rates increase by 25%	€ 413

X

- Definition

The discount rate used as the significant actuarial assumption to determine the present value of a defined benefit obligation. [Refer: Defined benefit obligation, at present value; Actuarial assumptions [domain]]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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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.

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- Definition

The amount of deficit in a defined benefit plan. [Refer: Defined benefit plans [domain]]

+ References

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- Definition

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