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INVESTMENTS AND OTHER FINANCIAL ASSETS - Narrative (Details) - EUR (€)
€ in Thousands
Dec. 31, 2022
Dec. 31, 2021
Disclosure of information about unconsolidated subsidiaries [line items]    
Other securities and financial assets € 10,447 € 11,582
Liberty Media    
Disclosure of information about unconsolidated subsidiaries [line items]    
Other securities and financial assets € 9,954 € 10,559