DISCONTINUED OPERATIONS - Income from discontinued operations, net of tax (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income (loss) from discontinued operations, net of income taxes	$ 0.0	$ 7.7	$ (19.4)	$ (52.5)
Spinoff | Technip Energies N.V.
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue	0.0	0.0	0.0	906.0
Costs and expenses	0.0	0.0	0.0	(889.3)
Other expense, net	0.0	0.0	0.0	(18.6)
Loss from discontinued operations before income taxes	0.0	0.0	0.0	(1.9)
Income tax expense (benefit)	0.0	(7.7)	19.4	50.6
Income (loss) from discontinued operations, net of income taxes	$ 0.0	$ 7.7	$ (19.4)	$ (52.5)