v3.25.4
Note 19 Effective tax rate (Details) - EUR (€)
€ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Effective tax rate [Line Items]      
Profit (loss) before tax € 16,227 € 15,405 [1] € 12,419 [1]
Reconciliation income tax [Member]      
Percentage effective tax rate 31.40% 31.40% 32.20%
Consolidated tax group in Spain [Member]      
Effective tax rate [Line Items]      
Profit (loss) before tax € 5,011 € 4,810 € 2,601
Other Spanish entities [Member]      
Effective tax rate [Line Items]      
Profit (loss) before tax 91 (41) 6
Foreign entities [Member]      
Effective tax rate [Line Items]      
Profit (loss) before tax € 11,125 € 10,636 € 9,812
[1]
(1) In the first quarter of 2025 certain immaterial balance sheet amounts related to specific activities undertaken by the business units were reallocated between the operating segments and the Corporate Center. As a result, certain expenses were reallocated, in particular, between Spain, Rest of Business and the Corporate Center. In order to make the period-on-period comparison homogeneous, the figures for the years 2024 and 2023 have been revised, which has not affected the consolidated financial information of the Group.