v3.26.1
Accounting principles - Foreign currency transactions and Segment information (Details)
€ in Millions
12 Months Ended
Dec. 31, 2025
EUR (€)
segment
Dec. 31, 2024
EUR (€)
Dec. 31, 2023
EUR (€)
Accounting principles      
Amount of expenses in a foreign currency | € € 31.4 € 37.3 € 46.8
Foreign currency expenses as a percentage of operating expenses 22.00% 33.00% 37.00%
Number of operating segments | segment 1