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Derivative financial instruments and hedge accounting - Effects recognized in finance income (loss) (Details) - EUR (€)
€ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Derivative financial instruments and hedge accounting      
Income (expense) from derivative financial instruments € 13 € (306) € 351
Currency      
Derivative financial instruments and hedge accounting      
Income (expense) from derivative financial instruments (70) (322) 391
Interest rate risk      
Derivative financial instruments and hedge accounting      
Income (expense) from derivative financial instruments 81 € 16 € (40)
Option contract      
Derivative financial instruments and hedge accounting      
Income (expense) from derivative financial instruments € 2