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SHARE-BASED COMPENSATION - Narrative (Details) - EUR (€)
€ / shares in Units, € in Millions
 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Share Based Payment Plans [line items]    
Number of instruments other equity instruments vested 1,338,744  
Expense from share-based payment transactions with employees € 12 € 10
PSUs    
Share Based Payment Plans [line items]    
Vesting period 3 years  
Fair value at grant date (in euros) (in EUR per share) € 24.84  
PSUs | Bottom of range    
Share Based Payment Plans [line items]    
Percentage of vesting multiplier 0.00%  
PSUs | Top of range    
Share Based Payment Plans [line items]    
Percentage of vesting multiplier 20000.00%  
RSUs    
Share Based Payment Plans [line items]    
Vesting period 3 years  
Number of instruments other equity instruments vested 473,952  
Fair value at grant date (in euros) (in EUR per share) € 18.14  
PSUs    
Share Based Payment Plans [line items]    
Percentage of vesting multiplier 100.00%  
Number of instruments other equity instruments vested 864,792  
Share price at grant date (in EUR per share) € 18.14