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Note 14 Securitized loans (Details) - EUR (€)
€ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Securitized loans [Line Items]      
Securitized mortgage assets € 23,695 € 23,953 € 26,169
Other securitized assets 6,547 6,144 4,249
Total securitized loans € 30,242 € 30,098 € 30,418