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Note 19 Effective tax rate (Details) - EUR (€)
€ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Effective tax rate [Line Items]      
Profit (loss) before tax € 10,356 € 7,247 € 5,248
Tax expense (income) € 3,529 € 1,909 € 1,459
Percentage effective tax rate 34.10% 26.30% 27.80%
Consolidated tax group in Spain [Member]      
Effective tax rate [Line Items]      
Profit (loss) before tax € 2,222 € 655 € 259
Other Spanish entities [Member]      
Effective tax rate [Line Items]      
Profit (loss) before tax (462) 5 7
Foreign entities [Member]      
Effective tax rate [Line Items]      
Profit (loss) before tax € 8,596 € 6,587 € 4,982