v3.25.4
Risk management - Aging analysis (past due but performing): Business lending portfolio by geographic area, outstandings (Details) - Business lending - EUR (€)
€ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Disclosure of credit risk exposure [line items]    
Financial assets € 8,071 € 9,174
Increase (decrease) in financial assets 1,100  
Past due for 1–30 days    
Disclosure of credit risk exposure [line items]    
Financial assets 7,303 8,873
Increase (decrease) in financial assets 1,600  
Past due for 31–60 days    
Disclosure of credit risk exposure [line items]    
Financial assets 720 215
Increase (decrease) in financial assets 500  
Past due for 61–90 days    
Disclosure of credit risk exposure [line items]    
Financial assets 47 86
Netherlands    
Disclosure of credit risk exposure [line items]    
Financial assets 626 943
Netherlands | Past due for 1–30 days    
Disclosure of credit risk exposure [line items]    
Financial assets 586 929
Netherlands | Past due for 31–60 days    
Disclosure of credit risk exposure [line items]    
Financial assets 31 14
Netherlands | Past due for 61–90 days    
Disclosure of credit risk exposure [line items]    
Financial assets 9
Belgium    
Disclosure of credit risk exposure [line items]    
Financial assets 508 1,217
Increase (decrease) in financial assets 700  
Belgium | Past due for 1–30 days    
Disclosure of credit risk exposure [line items]    
Financial assets 476 1,187
Belgium | Past due for 31–60 days    
Disclosure of credit risk exposure [line items]    
Financial assets 22 17
Belgium | Past due for 61–90 days    
Disclosure of credit risk exposure [line items]    
Financial assets 10 13
Germany    
Disclosure of credit risk exposure [line items]    
Financial assets 419 220
Increase (decrease) in financial assets 200  
Germany | Past due for 1–30 days    
Disclosure of credit risk exposure [line items]    
Financial assets 415 215
Germany | Past due for 31–60 days    
Disclosure of credit risk exposure [line items]    
Financial assets 2 3
Germany | Past due for 61–90 days    
Disclosure of credit risk exposure [line items]    
Financial assets 2 2
Poland    
Disclosure of credit risk exposure [line items]    
Financial assets 449 209
Increase (decrease) in financial assets 200  
Poland | Past due for 1–30 days    
Disclosure of credit risk exposure [line items]    
Financial assets 403 173
Poland | Past due for 31–60 days    
Disclosure of credit risk exposure [line items]    
Financial assets 31 17
Poland | Past due for 61–90 days    
Disclosure of credit risk exposure [line items]    
Financial assets 15 19
United Kingdom    
Disclosure of credit risk exposure [line items]    
Financial assets 1,046 838
Increase (decrease) in financial assets 200  
United Kingdom | Past due for 1–30 days    
Disclosure of credit risk exposure [line items]    
Financial assets 516 830
United Kingdom | Past due for 31–60 days    
Disclosure of credit risk exposure [line items]    
Financial assets 531 8
United Kingdom | Past due for 61–90 days    
Disclosure of credit risk exposure [line items]    
Financial assets
France    
Disclosure of credit risk exposure [line items]    
Financial assets 73 194
France | Past due for 1–30 days    
Disclosure of credit risk exposure [line items]    
Financial assets 73 194
France | Past due for 31–60 days    
Disclosure of credit risk exposure [line items]    
Financial assets
France | Past due for 61–90 days    
Disclosure of credit risk exposure [line items]    
Financial assets
Spain    
Disclosure of credit risk exposure [line items]    
Financial assets 9 26
Spain | Past due for 1–30 days    
Disclosure of credit risk exposure [line items]    
Financial assets 9 26
Spain | Past due for 31–60 days    
Disclosure of credit risk exposure [line items]    
Financial assets
Spain | Past due for 61–90 days    
Disclosure of credit risk exposure [line items]    
Financial assets
Luxembourg    
Disclosure of credit risk exposure [line items]    
Financial assets 222 423
Luxembourg | Past due for 1–30 days    
Disclosure of credit risk exposure [line items]    
Financial assets 212 367
Luxembourg | Past due for 31–60 days    
Disclosure of credit risk exposure [line items]    
Financial assets 9 51
Luxembourg | Past due for 61–90 days    
Disclosure of credit risk exposure [line items]    
Financial assets 1 5
Rest of Europe    
Disclosure of credit risk exposure [line items]    
Financial assets 919 681
Rest of Europe | Past due for 1–30 days    
Disclosure of credit risk exposure [line items]    
Financial assets 899 630
Rest of Europe | Past due for 31–60 days    
Disclosure of credit risk exposure [line items]    
Financial assets 17 4
Rest of Europe | Past due for 61–90 days    
Disclosure of credit risk exposure [line items]    
Financial assets 3 46
America    
Disclosure of credit risk exposure [line items]    
Financial assets 3,013 3,599
Increase (decrease) in financial assets 600  
America | Past due for 1–30 days    
Disclosure of credit risk exposure [line items]    
Financial assets 2,946 3,504
America | Past due for 31–60 days    
Disclosure of credit risk exposure [line items]    
Financial assets 68 95
America | Past due for 61–90 days    
Disclosure of credit risk exposure [line items]    
Financial assets
Asia    
Disclosure of credit risk exposure [line items]    
Financial assets 133 310
Asia | Past due for 1–30 days    
Disclosure of credit risk exposure [line items]    
Financial assets 133 310
Asia | Past due for 31–60 days    
Disclosure of credit risk exposure [line items]    
Financial assets
Asia | Past due for 61–90 days    
Disclosure of credit risk exposure [line items]    
Financial assets
Australia    
Disclosure of credit risk exposure [line items]    
Financial assets 654 475
Increase (decrease) in financial assets 200  
Australia | Past due for 1–30 days    
Disclosure of credit risk exposure [line items]    
Financial assets 636 469
Australia | Past due for 31–60 days    
Disclosure of credit risk exposure [line items]    
Financial assets 10 6
Australia | Past due for 61–90 days    
Disclosure of credit risk exposure [line items]    
Financial assets 7
Africa    
Disclosure of credit risk exposure [line items]    
Financial assets 39
Africa | Past due for 1–30 days    
Disclosure of credit risk exposure [line items]    
Financial assets 39
Africa | Past due for 31–60 days    
Disclosure of credit risk exposure [line items]    
Financial assets
Africa | Past due for 61–90 days    
Disclosure of credit risk exposure [line items]    
Financial assets