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SUBSEQUENT EVENT (Details)
€ / shares in Units, shares in Thousands, € in Millions, $ in Millions
Jul. 29, 2021
USD ($)
shares
Jul. 29, 2021
EUR (€)
€ / shares
shares
Jun. 30, 2021
Apr. 30, 2021
Feb. 16, 2021
Dec. 31, 2020
USD ($)
Mar. 12, 2018
USD ($)
Technip Energies              
Subsequent Event [Line Items]              
Equity method investment, ownership percentage         49.90%    
Technip Energies | Subsequent Event              
Subsequent Event [Line Items]              
Equity securities, number of shares sold (in shares) | shares 39,500 39,500          
Equity method investment, ownership percentage   22.00%          
Private Placement | Subsequent Event              
Subsequent Event [Line Items]              
Sale, price per share (in Euro per share) | € / shares   € 11.20          
Private Placement | Technip Energies | Subsequent Event              
Subsequent Event [Line Items]              
Equity securities, number of shares sold (in shares) | shares 16,000 16,000          
Proceeds from sale $ 212.8 € 179.2          
Island Offshore Subsea AS | Island Offshore Subsea AS              
Subsequent Event [Line Items]              
Redeemable noncontrolling interest, acquired percent           51.00%  
Fair value | $           $ 43.7  
Island Offshore Subsea AS | Island Offshore Subsea AS | Share Purchase Agreement              
Subsequent Event [Line Items]              
Purchased shares (percentage)             51.00%
Remaining interest (percentage)             49.00%
Total price | $             $ 48.7
Technip Energies N.V. | Technip Energies              
Subsequent Event [Line Items]              
Percentage of share capital       15.00%      
Equity method investment, ownership percentage     31.10%        
Technip Energies N.V. | Private Placement | Technip Energies | Subsequent Event              
Subsequent Event [Line Items]              
Percentage of share capital   9.00%