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Note 38 Dividend income breakdown by headline (Details) - EUR (€)
€ in Millions
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Dividend Income Breakdown By Headline [Line Items]      
Dividend income € 120 € 118 € 123
Financial assets at fair value through profit or loss, category [member]      
Dividend Income Breakdown By Headline [Line Items]      
Dividend income 10 11 15
Financial assets at fair value through other comprehensive income, category [member]      
Dividend Income Breakdown By Headline [Line Items]      
Dividend income [1] € 109 € 107 € 108
[1] (1) Dividend income corresponds mainly to investments held at the end of the year.