v3.25.4
Segments - Additional information (Details) - EUR (€)
€ in Millions
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Disclosure of operating segments [line items]      
Revenue € 25,678 € 21,087 € 18,121
Impairments 9 35 5
Net Results IFRS-EU | Segments banking activities      
Disclosure of operating segments [line items]      
Revenue 23,035 22,615 22,575
Operating expense € 12,583 12,121 11,564
Net Results IFRS-EU | Segments banking activities | Corporate Line      
Disclosure of operating segments [line items]      
Percentage of business lending of outstanding 0.28    
Revenue € 484 378 450
Increase due to foreign currency ratio hedging 70    
Increase due to financial participation 49    
Impairments 16 53  
Operating expense 512 533 € 542
Hyperinflationary accounting, net profit (loss) 12 35  
Hyperinflation impact, restructuring costs € 73 25  
Hyperinflation impact, one-off CLA payment to staff   22  
Provision for hyperinflationary impact   € 21  
Van Lanschot Kempen N.V      
Disclosure of operating segments [line items]      
Interest held 20.30% 2.70%