BUSINESS SEGMENTS - Schedule of Segment Revenue and Segment Operating Profit (Details) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($) segment	Sep. 30, 2022 USD ($)
Segment Reporting, Measurement Disclosures [Abstract]
Number of reportable segments | segment			2
Segment Reporting Information
Total segment revenue	$ 2,056.9	$ 1,733.0	$ 5,746.5	$ 5,006.0
Total segment operating profit	211.0	124.0	479.3	288.8
Loss on early extinguishment of debt	0.0	0.0	0.0	(29.8)
Loss from investment in Technip Energies	0.0	0.0	0.0	(27.7)
Total corporate items	(97.8)	(70.6)	(373.9)	(213.6)
Income before income taxes	113.2	53.4	105.4	75.2
Operating Segments | Subsea
Segment Reporting Information
Total segment revenue	1,708.3	1,415.0	4,714.3	4,118.7
Total segment operating profit	177.7	105.0	397.9	256.1
Operating Segments | Surface Technologies
Segment Reporting Information
Total segment revenue	348.6	318.0	1,032.2	887.3
Total segment operating profit	33.3	19.0	81.4	32.7
Corporate
Segment Reporting Information
Corporate expense	(24.7)	(25.2)	(205.6)	(76.7)
Net interest expense	(26.7)	(30.9)	(75.7)	(92.5)
Loss on early extinguishment of debt	0.0	0.0	0.0	(29.8)
Loss from investment in Technip Energies	0.0	0.0	0.0	(27.7)
Foreign exchange gains (losses)	$ (46.4)	$ (14.5)	$ (92.6)	$ 13.1