DISCONTINUED OPERATIONS - Income from discontinued operations, net of tax (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2021	Mar. 31, 2020
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income (loss) from discontinued operations	$ (60.2)	$ (17.8)
Spinoff | Technip Energies N.V.
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Revenue	906.0	1,547.7
Costs and expenses	889.3	1,442.4
Other income and interest expense, net	(18.6)	(62.2)
Income (loss) from discontinued operations before income taxes	(1.9)	43.1
Income (loss) from discontinued operations	$ (60.2)	$ (17.8)