v3.26.1
FINANCIAL INSTRUMENTS AND FINANCIAL RISK MANAGEMENT - Derivatives (Details)
12 Months Ended
Dec. 31, 2025
EUR (€)
Disclosure of detailed information about financial instruments [line items]  
Transfer from Level 1 to Level 2 assets € 0
Transfer from Level 2 to Level 1 assets 0
Transfer into Level 3 assets 0
Transfer out of Level 3 assets 0
Transfer from Level 1 to Level 2 liabilities 0
Transfer from Level 2 to Level 1 liabilities 0
Transfer into Level 3 liabilities 0
Transfer out of Level 3 liabilities € 0
Change in Share Price  
Disclosure of detailed information about financial instruments [line items]  
Percentage of changes in increase 10.00%
Percentage of changes in decrease 10.00%
Increase in Fair value of embedded derivatives € 11,460,000
Decrease in Fair value of embedded derivatives 9,434,000
Increase in Effect on financial result 1,031,000.000
Decrease in Effect on financial result € (995,000,000)
Change in Share volatility  
Disclosure of detailed information about financial instruments [line items]  
Percentage of changes in increase 10.00%
Percentage of changes in decrease 10.00%
Increase in Fair value of embedded derivatives € 10,846,000
Decrease in Fair value of embedded derivatives 9,946,000
Increase in Effect on financial result 417,000,000
Decrease in Effect on financial result € (483,000,000)
Change in Credit Spread  
Disclosure of detailed information about financial instruments [line items]  
Percentage of changes in increase 10.00%
Percentage of changes in decrease 10.00%
Increase in Fair value of embedded derivatives € 10,390,000
Decrease in Fair value of embedded derivatives 10,468,000
Increase in Effect on financial result (39,000,000)
Decrease in Effect on financial result € 39,000,000