BUSINESS SEGMENTS - Schedule of Segment Revenue and Segment Operating Profit (Details) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023 USD ($)	Jun. 30, 2022 USD ($)	Jun. 30, 2023 USD ($) segment	Jun. 30, 2022 USD ($)
Segment Reporting, Measurement Disclosures [Abstract]
Number of reportable segments | segment			2
Segment Reporting Information
Total segment revenue	$ 1,972.2	$ 1,717.2	$ 3,689.6	$ 3,273.0
Total segment operating profit	179.1	107.1	268.3	164.8
Loss on early extinguishment of debt	0.0	(29.8)	0.0	(29.8)
Income (loss) from investment in Technip Energies	0.0	0.8	0.0	(27.7)
Income (loss) before income taxes	(53.0)	27.6	(7.8)	21.8
Operating Segments | Subsea
Segment Reporting Information
Total segment revenue	1,618.4	1,414.6	3,006.0	2,703.7
Total segment operating profit	153.4	97.1	220.2	151.1
Operating Segments | Surface Technologies
Segment Reporting Information
Total segment revenue	353.8	302.6	683.6	569.3
Total segment operating profit	25.7	10.0	48.1	13.7
Corporate
Segment Reporting Information
Corporate expense	(153.5)	(22.0)	(180.9)	(51.5)
Net interest expense	(30.3)	(27.7)	(49.0)	(61.6)
Loss on early extinguishment of debt	0.0	(29.8)	0.0	(29.8)
Income (loss) from investment in Technip Energies	0.0	0.8	0.0	(27.7)
Foreign exchange gains (losses)	(48.3)	(0.8)	(46.2)	27.6
Total corporate items	(232.1)	$ (79.5)	(276.1)	$ (143.0)
Corporate | CJIP
Segment Reporting Information
Legal settlement charge	$ 126.5		$ 126.5