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Financial liabilities at fair value through profit or loss - Additional information (Details) - EUR (€)
€ in Millions
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Disclosure of fair value measurement of liabilities [abstract]    
Fair value of financial liability, attributable to changes in credit risk of liability € 17 € (34)
Financial liabilities designated at fair value through profit or loss to pay at maturity to the holders € 11,376 € 9,957