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INFORMATION BY GEOGRAPHIC AREA (Details) - EUR (€)
€ in Millions
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment € 2,047 € 2,017 € 1,948
United States      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment 806 832  
France      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment 772 699  
Germany      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment 248 269  
Czech Republic      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment 95 97  
Other      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment € 126 € 120