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Note 28 Restricted reserves breakdown by concepts (Details) - EUR (€)
€ in Millions
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Restricted reserves breakdown by concepts [Line Items]      
Restricted reserve for retired capital € 531 € 495 € 400
Restricted reserve for parent company shares and loans for those shares 49 65 80
Restricted reserve for redenomination of capital in euros 2 2 2
Total restricted reserves € 582 € 561 € 482