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Guarantees, commitments and risks - Value at risk - parametric method (Details) - EUR (€)
€ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Interest rate risk    
Guarantees, commitments and risks    
Value at risk € 3,220 € 3,660
Interest rate risk | Maximum    
Guarantees, commitments and risks    
Value at risk 9,050 11,040
Interest rate risk | Minimum    
Guarantees, commitments and risks    
Value at risk 2,610 1,290
Interest rate risk | Average    
Guarantees, commitments and risks    
Value at risk 5,190 3,320
Currency    
Guarantees, commitments and risks    
Value at risk 340 120
Currency | Maximum    
Guarantees, commitments and risks    
Value at risk 950 280
Currency | Minimum    
Guarantees, commitments and risks    
Value at risk 90 110
Currency | Average    
Guarantees, commitments and risks    
Value at risk € 290 € 180