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Risk management - Reconciliation of model (reportable) ECL to total ECL (Details) - EUR (€)
€ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Disclosure Of Financial Assets [Line Items]    
Total ECL € 6,101 € 5,368
Economic sector based adjustments 71 341
Excluding all managment adjustments    
Disclosure Of Financial Assets [Line Items]    
Total model ECL 3,209 2,408
ECL from individually assessed impairments 2,439 2,342
ECL from management adjustments 453 618
Total ECL € 6,101 € 5,368