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Remuneration of key management - Remuneration of President and CEO (Details) - Pekka Lundmark (CEO) - EUR (€)
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Disclosure of attribution of expenses by nature to their function [line items]      
Base salary € 1,410,500 € 1,322,750 € 1,300,000
Cash incentive payments 1,824,834 1,079,695 2,342,438
Share-based payments 3,117,360 5,041,885 5,425,169
Pension expenses 310,937 422,274 406,806
Other benefits 55,044 95,756 113,850
Total € 6,718,675 € 7,962,360 € 9,588,263