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SUBSEQUENT EVENT (Details)
€ / shares in Units, shares in Thousands, € in Millions, $ in Millions
3 Months Ended
Apr. 27, 2021
USD ($)
shares
Apr. 27, 2021
EUR (€)
€ / shares
shares
Apr. 08, 2021
USD ($)
Mar. 31, 2021
USD ($)
Feb. 16, 2021
Technip Energies          
Subsequent Event [Line Items]          
Purchased value | $       $ 100.0  
Equity method investment, ownership percentage       45.70% 49.90%
Subsequent Event | Private Placement          
Subsequent Event [Line Items]          
Sale, price per share (in Euro per share) | € / shares   € 11.10      
Subsequent Event | Technip Energies          
Subsequent Event [Line Items]          
Purchased value | $     $ 100.0    
Equity securities, number of shares sold (in shares) 55,500 55,500      
Equity method investment, ownership percentage   31.00%      
Subsequent Event | Technip Energies | Private Placement          
Subsequent Event [Line Items]          
Equity securities, number of shares sold (in shares) 25,000 25,000      
Proceeds from sale $ 335.2 € 277.5      
Subsequent Event | Technip Energies | Concurrent Sale To Technip Energies          
Subsequent Event [Line Items]          
Equity securities, number of shares sold (in shares) 1,800 1,800      
Sale, price per share (in Euro per share) | € / shares   € 11.10      
Proceeds from sale $ 24.2 € 20.0      
Subsequent Event | Technip Energies N.V. | Technip Energies          
Subsequent Event [Line Items]          
Percentage of share capital   15.00%      
Subsequent Event | Technip Energies N.V. | Technip Energies | Private Placement          
Subsequent Event [Line Items]          
Percentage of share capital   14.00%      
Subsequent Event | Technip Energies N.V. | Technip Energies | Concurrent Sale To Technip Energies          
Subsequent Event [Line Items]          
Percentage of share capital   1.00%