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PENSION AND OTHER POST-EMPLOYMENT BENEFIT OBLIGATIONS - Benefit Payments Expected to be Paid Either by Pension Funds or Directly to Beneficiaries (Details)
€ in Millions
 12 Months Ended
Dec. 31, 2023
EUR (€)
Disclosure of employee benefits [Abstract]  
2024 € 57
2025 56
2026 55
2027 56
2028 60
2029 to 2033 € 300