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Note 53 Balance of income statement arising from transactions with entities of the group (Details) - EUR (€)
€ in Millions
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Profit and loss related party transactions [Line Items]      
Interest Income And Other Similar Interests Related Party Transactions € 37 € 44 € 20
Interest Expense Related Party Transactions 4 4 2
Fee and commission income related parties transactions 7 4 5
Fee And Commission Expense Related Party Transactions € 55 € 49 € 40