BUSINESS SEGMENTS - Schedule of segment revenue and segment operating profit (Details) $ in Millions	12 Months Ended
	Dec. 31, 2023 USD ($) segment	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | segment	2
Revenues	$ 7,824.2	$ 6,700.4	$ 6,403.5
Total segment operating profit (loss)	658.2	375.9	183.4
Corporate expenses	(243.9)	(104.7)	(118.1)
Net interest expense	(88.7)	(120.9)	(143.3)
Loss on early extinguishment of debt	0.0	(29.8)	(61.9)
Income (loss) from investment in Technip Energies	0.0	(27.7)	322.2
Foreign exchange gains (losses)	(119.0)	(23.9)	15.8
Income (loss) before income taxes	206.6	68.9	198.1
Subsea
Segment Reporting Information [Line Items]
Revenues	$ 6,434.8	5,461.2	5,329.1
Subsea | Largest Customer | Revenue, Segment Benchmark | Customer Concentration Risk
Segment Reporting Information [Line Items]
Concentration (percent)	16.00%
Surface Technologies
Segment Reporting Information [Line Items]
Revenues	$ 1,389.4	1,239.2	1,074.4
Operating segments | Subsea
Segment Reporting Information [Line Items]
Revenues	6,434.8	5,461.2	5,329.1
Total segment operating profit (loss)	543.6	317.6	141.4
Operating segments | Surface Technologies
Segment Reporting Information [Line Items]
Revenues	1,389.4	1,239.2	1,074.4
Total segment operating profit (loss)	114.6	58.3	42.0
Corporate
Segment Reporting Information [Line Items]
Total corporate items	$ (451.6)	$ (307.0)	$ 14.7