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Income taxes - Components (Details) - EUR (€)
€ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Components of the income tax benefit/(expense)      
Current tax € (426) € (409) € (295)
Deferred tax 2,452 137 (2,961)
Total € 2,026 € (272) € (3,256)