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Note 20 - Fair Value of collateral received (Detail) - EUR (€)
€ in Millions
Dec. 31, 2022
Dec. 31, 2021
Collateral Received    
Securities and other financial assets accepted as collateral € 309,107 € 260,003
Of which: [Abstract]    
collateral sold or repledged € 254,856 € 222,232