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Financial liabilities at fair value through profit or loss - Non-trading rerivatives by type (Detail) - EUR (€)
€ in Millions
Dec. 31, 2024
Dec. 31, 2023
Disclosure of fair value measurement of liabilities [line items]    
– Non-trading derivatives € 2,101 € 2,019
Other non-trading derivatives    
Disclosure of fair value measurement of liabilities [line items]    
– Non-trading derivatives 1,332 1,356
-  fair value hedges    
Disclosure of fair value measurement of liabilities [line items]    
– Non-trading derivatives 79 113
-  cash flow hedges    
Disclosure of fair value measurement of liabilities [line items]    
– Non-trading derivatives 573 458
-  hedges of net investments in foreign operations    
Disclosure of fair value measurement of liabilities [line items]    
– Non-trading derivatives € 117 € 92