v3.26.1
Other disclosures - Disclosure of gross exposure by stages of impairment (Details) - Property assets from home purchase mortgage loans to households - Spain - Gross carrying amount - EUR (€)
€ in Millions
Jun. 30, 2026
Dec. 31, 2025
Disclosure of credit risk exposure [line items]    
Financial assets € 64,030 € 60,002
With collateral    
Disclosure of credit risk exposure [line items]    
Financial assets 63,049 59,787
Less than or equal to 40% | With collateral    
Disclosure of credit risk exposure [line items]    
Financial assets 17,826 17,191
More than 40% or less than 60% | With collateral    
Disclosure of credit risk exposure [line items]    
Financial assets 21,061 20,310
More than 60% and less than 80% | With collateral    
Disclosure of credit risk exposure [line items]    
Financial assets 20,703 18,811
More than 80% and less or equal to 100% | With collateral    
Disclosure of credit risk exposure [line items]    
Financial assets 2,940 2,812
More than 100% | With collateral    
Disclosure of credit risk exposure [line items]    
Financial assets 519 663
Credit impaired    
Disclosure of credit risk exposure [line items]    
Financial assets 518 625
Credit impaired | With collateral    
Disclosure of credit risk exposure [line items]    
Financial assets 492 618
Credit impaired | Less than or equal to 40% | With collateral    
Disclosure of credit risk exposure [line items]    
Financial assets 108 122
Credit impaired | More than 40% or less than 60% | With collateral    
Disclosure of credit risk exposure [line items]    
Financial assets 136 158
Credit impaired | More than 60% and less than 80% | With collateral    
Disclosure of credit risk exposure [line items]    
Financial assets 116 151
Credit impaired | More than 80% and less or equal to 100% | With collateral    
Disclosure of credit risk exposure [line items]    
Financial assets 61 84
Credit impaired | More than 100% | With collateral    
Disclosure of credit risk exposure [line items]    
Financial assets € 71 € 103