v3.25.2
Other disclosures - Disclosure of financing for construction and real estate business in Spain (Details) - Spain - EUR (€)
€ in Millions
Jun. 30, 2025
Dec. 31, 2024
Construction and property development loans    
Disclosure of credit risk exposure [line items]    
Financial assets € 2,696 € 2,517
Gross carrying amount | Construction and property development loans    
Disclosure of credit risk exposure [line items]    
Financial assets 2,721 2,545
Written-off assets 244 338
Gross carrying amount | Construction and property development loans | Credit impaired    
Disclosure of credit risk exposure [line items]    
Financial assets 43 58
Excess over collateral value | Construction and property development loans    
Disclosure of credit risk exposure [line items]    
Risk exposure 219 278
Excess over collateral value | Construction and property development loans | Credit impaired    
Disclosure of credit risk exposure [line items]    
Risk exposure 3 6
Accumulated impairment    
Disclosure of credit risk exposure [line items]    
Financial assets (1,025) (1,132)
Accumulated impairment | Construction and property development loans    
Disclosure of credit risk exposure [line items]    
Financial assets (25) (28)
Accumulated impairment | Construction and property development loans | Credit impaired    
Disclosure of credit risk exposure [line items]    
Financial assets € (17) € (21)