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Finance debt - Currency of long-term debt (Details) - EUR (€)
€ in Millions
Dec. 31, 2022
Dec. 31, 2021
Dec. 01, 2021
Borrowings      
Borrowings € 26,917 € 27,794 € 27,794
Short term debt      
Borrowings      
Borrowings 4,446 2,299  
Short term debt | Euro      
Borrowings      
Borrowings 3,994 1,356  
Short term debt | U.S. dollars      
Borrowings      
Borrowings 337 928  
Short term debt | Other currencies      
Borrowings      
Borrowings 115 15  
Long term debt and current portion of long term debt      
Borrowings      
Borrowings 22,471 25,495  
Long term debt and current portion of long term debt | Euro      
Borrowings      
Borrowings 17,171 20,399  
Long term debt and current portion of long term debt | U.S. dollars      
Borrowings      
Borrowings 5,298 € 5,096  
Long term debt and current portion of long term debt | Other currencies      
Borrowings      
Borrowings € 2