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INVESTMENTS - Additional Information (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended	9 Months Ended		12 Months Ended
	Jun. 30, 2023	Sep. 30, 2021	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Feb. 16, 2021
Schedule of Equity Method Investments [Line Items]
Income from equity affiliates					$ 34.4	$ 44.6	$ 0.6
Investments					274.4	325.0
Income (loss) from investment in Technip Energies					$ 0.0	(27.7)	322.2
Magma Global Limited
Schedule of Equity Method Investments [Line Items]
Equity method investment impairment		$ 36.7	$ 0.0	$ 0.0
Dofcon Brasil AS
Schedule of Equity Method Investments [Line Items]
Ownership percentage					50.00%
Dividends receivable	$ 170.0
Value of guarantees					$ 380.9
Investments					$ 261.9	312.8
Techdof Brasil AS
Schedule of Equity Method Investments [Line Items]
Equity method investment impairment	$ 0.0
Serimax Holdings SAS
Schedule of Equity Method Investments [Line Items]
Ownership percentage					20.00%
Investments					$ 8.9	8.6
Magnora ASA, Magnora Offshore Wind
Schedule of Equity Method Investments [Line Items]
Ownership percentage					20.00%
Investments					$ 3.0
Technip Energies
Schedule of Equity Method Investments [Line Items]
Ownership percentage								49.90%
Subsea
Schedule of Equity Method Investments [Line Items]
Income from equity affiliates						$ 44.6	$ 0.6
DOF \| Dofcon Brasil AS
Schedule of Equity Method Investments [Line Items]
Ownership percentage					50.00%
Dofcon Brasil AS \| Dofcon Brazil Navegacao
Schedule of Equity Method Investments [Line Items]
Ownership percentage					100.00%
Dofcon Brasil AS \| Techdof Brasil AS
Schedule of Equity Method Investments [Line Items]
Ownership percentage					100.00%