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Financial liabilities at fair value through profit or loss - Summary of designated as at fair value through profit or loss by type (Details) - EUR (€)
€ in Millions
Dec. 31, 2024
Dec. 31, 2023
Disclosure of fair value measurement of liabilities [line items]    
Designated at fair value through profit or loss € 49,543 € 55,400
Funds entrusted    
Disclosure of fair value measurement of liabilities [line items]    
Designated at fair value through profit or loss 39,577 46,633
Subordinated liabilities    
Disclosure of fair value measurement of liabilities [line items]    
Designated at fair value through profit or loss 122 95
- Debt securities    
Disclosure of fair value measurement of liabilities [line items]    
Designated at fair value through profit or loss € 9,844 € 8,672