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Note 15 Derivatives Hedge accounting and fair value changes of the hedged items in portfolio hedge of interest rate risk (Details) - EUR (€)
€ in Millions
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Disclousre of derivative financial assets held for hedging [Line Items]      
Derivative financial assets held for hedging € 1,891 € 1,805 € 1,991
Accumulated fair value hedge adjustment on hedged item included in carrying amount, assets (148) 5 51
Derivative financial liabilities held for hedging 3,303 2,626 2,318
Accumulated fair value hedge adjustment on hedged item included in carrying amount, liabilities € 0 € 0 € 0