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Other liabilities - Additional information (Details) - EUR (€)
€ in Millions
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Other liabilities [abstract]      
Payments of lease liabilities, classified as financing activities € 290 € 291 € 296
Share buyback programme, liability 1,275 538  
Dividend payables € 423 € 0