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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, 2021
Dec. 31, 2020
Dec. 31, 2019
Profit and loss related party transactions [Line Items]      
Interest Income And Other Similar Interests Related Party Transactions € 16 € 20 € 19
Interest Expense Related Party Transactions 0 1 1
Fee and commission income related parties transactions 8 5 4
Fee And Commission Expense Related Party Transactions € 31 € 34 € 53