v3.25.4
Investment in associates and joint ventures - Balance Sheet and profit loss information of associate (Details) - EUR (€)
€ in Millions
 12 Months Ended
Dec. 31, 2025
Sep. 30, 2025
Dec. 31, 2024
Sep. 30, 2024
Dec. 31, 2023
Dec. 31, 2022
Disclosure of investments in associates and joint ventures [line items]            
Loans and advances to customers € 727,733   € 683,611      
Other 7,975   6,945      
Total assets 1,060,329   1,023,856   € 980,299  
Deposits 721,373   691,661      
Other 11,989   12,369      
Total liabilities 1,004,990   970,158      
Total equity 55,339   53,698   55,628 € 57,004
Total operating income 25,678   21,087   18,121  
Total expenses 13,887   13,315   12,084  
Net results 8,599   5,592   4,374  
Total comprehensive income € 8,628   € 6,948   € 5,360  
TMBThanachart Bank Public Company Limited            
Disclosure of investments in associates and joint ventures [line items]            
Loans and advances to customers   € 31,009   € 33,878    
Interbank and money market items, net   5,856   7,152    
Investments, net   5,917   4,680    
Other   3,158   3,436    
Total assets   45,940   49,147    
Deposits   34,345   36,563    
Interbank and money market items   2,663   2,633    
Debts issued and borrowings   462   1,139    
Other   1,942   2,218    
Total liabilities   39,412   42,554    
Total equity   6,529   6,593    
Total operating income   1,795   1,991    
Total expenses   1,266   1,548    
Net results   555   586    
Total comprehensive income   € 170   € 17