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INFORMATION BY GEOGRAPHIC AREA (Details) - EUR (€)
€ in Millions
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment € 2,017 € 1,948 € 1,906
United States      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment 832 811  
France      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment 699 653  
Germany      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment 269 266  
Czech Republic      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment 97 99  
Other      
Disclosure of detailed information about property, plant and equipment [line items]      
Property, plant and equipment € 120 € 119