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MATERIAL ACCOUNTING POLICIES - NON CURRENT ASSETS WITH DEFINITE USEFUL LIVES (Details) - EUR (€)
€ in Thousands
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Disclosure of detailed information about intangible assets [line items]      
Intangible assets € 1,419,699 € 1,307,388 € 1,138,173
Property, plant and equipment 1,575,200 1,457,825 € 1,353,165
Development costs      
Disclosure of detailed information about intangible assets [line items]      
Intangible assets 1,369,895 1,264,467  
Increase (decrease) in intangible assets other than goodwill € 448,380 € 416,368