v3.25.4
Details of treasury and other financial risks - Remaining risks narrative (Details) - EUR (€)
€ in Thousands
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Details of treasury and other financial risks [Line Items]    
Financial assets carried at fair value € 731,000 € 609,000
Financial assets carried at FVTOCI 252,000 244,000
Bottom of range    
Details of treasury and other financial risks [Line Items]    
Policy deductibles per occurrence 10  
Top of range    
Details of treasury and other financial risks [Line Items]    
Policy deductibles per occurrence 10,000  
United States    
Details of treasury and other financial risks [Line Items]    
Country risk exposure 12,000,000  
Netherlands    
Details of treasury and other financial risks [Line Items]    
Country risk exposure 1,600,000  
China    
Details of treasury and other financial risks [Line Items]    
Country risk exposure 769,000  
Other countries    
Details of treasury and other financial risks [Line Items]    
Country risk exposure   500,000
United Kingdom    
Details of treasury and other financial risks [Line Items]    
Country risk exposure 732,000  
Germany    
Details of treasury and other financial risks [Line Items]    
Country risk exposure 627,000  
France    
Details of treasury and other financial risks [Line Items]    
Country risk exposure 537,000  
Japan    
Details of treasury and other financial risks [Line Items]    
Country risk exposure 532,000  
Singapore    
Details of treasury and other financial risks [Line Items]    
Country risk exposure 204,000  
India    
Details of treasury and other financial risks [Line Items]    
Country risk exposure 238,000  
Commodity price risk    
Details of treasury and other financial risks [Line Items]    
Derivative financial assets held for hedging 17,000 6,000
Level 1    
Details of treasury and other financial risks [Line Items]    
Financial assets carried at fair value 2,000  
Financial assets carried at FVTOCI 2,000  
Equity investments | Level 1    
Details of treasury and other financial risks [Line Items]    
Financial assets carried at fair value 2,000 4,000
Equity investments | Level 2 and 3 of fair value hierarchy    
Details of treasury and other financial risks [Line Items]    
Financial assets carried at FVTOCI € 214,000 € 220,000