DISCONTINUED OPERATIONS - Income from discontinued operations, net of tax (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Loss from discontinued operations, net of income taxes	$ 0.0	$ (45.3)	$ (72.6)
Spinoff | Technip Energies N.V.
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue		0.0	906.0
Costs and expenses		(26.4)	(932.0)
Other income and (expense), net		0.0	(18.6)
Loss from discontinued operations before income taxes		(26.4)	(44.6)
Income tax expense		18.9	28.0
Loss from discontinued operations, net of income taxes		$ (45.3)	$ (72.6)