v3.26.1
Accumulated retained earnings - Schedule of accumulated retained earnings and reserves of entities accounted for using the equity method (Details) - EUR (€)
€ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Disclosure of reserves within equity [line items]      
Revaluation reserve Royal Decree-Law 7/1996 € 0 € 0 € 0
Reserves of subsidiaries € 47,937 47,249 47,669
Percentage of share capital required to be maintained in the legal reserve 20.00%    
Equity Investments      
Disclosure of reserves within equity [line items]      
Restricted reserves € 3,328 3,084 2,899
Legal reserve 1,469 1,515 1,618
Own shares 480 421 649
Revaluation reserve Royal Decree-Law 7/1996 43 43 43
Reserve for retired capital 1,336 1,105 589
Unrestricted reserves 31,519 24,186 16,033
Voluntary reserves 26,357 20,362 14,284
Consolidation reserves attributable to the Bank 5,162 3,824 1,749
Reserves of subsidiaries 47,937 47,249 47,669
Reserves of entities accounted for using the equity method 1,643 1,831 1,762
Accumulated retained earnings and other reserves € 84,427 € 76,350 € 68,363