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Note 19 Tax assets and liabilities (Details) - EUR (€)
€ in Millions
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
 [2]
Dec. 31, 2021
 [3]
Tax assets and liabilities [Line Items]        
Current tax assets [1] € 4,295 € 2,860 € 1,978  
Deferred tax assets 14,354 14,641 14,747 [3] € 14,917
Tax assets 18,650 17,501 16,725  
Current tax liabilities [1] 575 878 1,415  
Deferred tax liabilities 2,458 1,677 1,520 [3] € 1,769
Tax liabilities 3,033 2,554 2,935  
Pensions [Member]        
Tax assets and liabilities [Line Items]        
Deferred tax assets 534 445 422  
Financial instruments [Member]        
Tax assets and liabilities [Line Items]        
Deferred tax assets 1,335 1,069 1,478  
Deferred tax liabilities 915 761 557  
Loss allowances [Member]        
Tax assets and liabilities [Line Items]        
Deferred tax assets 2,158 2,127 1,834  
Other [Member]        
Tax assets and liabilities [Line Items]        
Deferred tax assets 1,495 1,467 1,261  
Deferred tax liabilities 1,543 916 963  
Secured tax assets [Member]        
Tax assets and liabilities [Line Items]        
Deferred tax assets 7,979 8,534 8,689  
Tax losses [Member]        
Tax assets and liabilities [Line Items]        
Deferred tax assets € 853 € 999 € 1,063  
[1]
(1) In 2024, the increase in current tax assets corresponds mainly to a higher tax receivable of the tax group in Spain, as well as in Mexico and Colombia, in relation to the Corporate Income Tax for the year 2024 related to the installment payments made in the year. On the other hand, the decrease in current tax liabilities corresponds mainly to the decrease in the tax payable in Mexico and Argentina in relation to the estimated income tax for the year 2023.
[2]
(2) Balances corresponding to 2022 have been restated according to IFRS 17 (see Note 1.3).
[3] (1) Balances corresponding to 2022 have been restated according to IFRS 17 (see Note 1.3)