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Note 8 Cash Cash Balances At Central Banks And Other Demand Deposits (Details) - EUR (€)
€ in Millions
Jun. 30, 2023
Dec. 31, 2022
Jun. 30, 2022
Dec. 31, 2021
Cash Cash balances at central banks and other demand deposits [Line Items]        
Cash € 6,951 € 6,533 € 6,671  
Cash and bank balances at central banks 58,888 67,314 66,302  
Other financial assets 6,019 5,909 8,535  
Cash and cash equivalents € 71,858 € 79,756 € 81,508 € 67,799