Percentage of bonus on net invested amount after minimum period for retaining the shares or stock options.

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- Definition

Share-based Compensation Arrangement By Share-based Payment Award, Maximum Annual Contributions Per Employee, Percent

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- Definition

Minimum period for retaining the shares and stock options to qualify for bonus.

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- Definition

The cash inflow from the issuance of common stock, preferred stock, treasury stock, stock options, and other types of equity.

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- Definition

Estimated period over which an employee is required to provide service in exchange for the equity-based payment award, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Share-based compensation - Narrative (Details) - EUR (€) € in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Net proceeds from issuance of shares	€ 124.0	€ 99.4	€ 81.8
Employee stock option plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Requisite service period	3 years
Stock options expiration period	10 years
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Long-term incentive bonus plan vesting period	2 years 6 months
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Long-term incentive bonus plan vesting period	3 years
Employee Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum net amount, percentage of annual gross base salary (in percentage)	10.00%
Minimum period for retaining shares or stock option to qualify for bonus	12 months
Percentage of bonus on initial participation amount after minimum period for retaining shares or stock options (in percentage)	20.00%