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Financial risk management - Interest rate Sensitivity (Details) € in Millions | 12 Months Ended
--- | ---
Dec. 31, 2025 EUR (€) | Dec. 31, 2024 EUR (€)
Derivative [Line Items] |  |
Increase of interest rates (in percentage) | 0.0100 |
Impact on equity |  |
Derivative [Line Items] |  |
Sensitivity analysis, impact of 1 percent point increase in interest rates | € 0.0 | € 0.0
Impact on net income |  |
Derivative [Line Items] |  |
Sensitivity analysis, impact of 1 percent point increase in interest rates | € 106.7 | € 94.9

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