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Note 28 Restricted reserves breakdown by concepts (Details) - EUR (€)
€ in Millions
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Restricted reserves breakdown by concepts [Line Items]      
Restricted reserve for retired capital € 88 € 88 € 88
Restricted reserve for parent company shares and loans for those shares [1] 672 30 34
Restricted reserve for redenomination of capital in euros 2 2 2
Total restricted reserves € 761 € 120 € 124
[1] (*) The variation in 2021 is mainly due to the share buyback program (see Note 4).