BUSINESS SEGMENTS - Schedule of segment revenue and segment operating profit (Details) $ in Millions	12 Months Ended
	Dec. 31, 2022 USD ($) segment	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Segment Reporting Information [Line Items]
Number of reportable segments | segment	2
Revenues	$ 6,700.4	$ 6,403.5	$ 6,530.6
Total segment operating profit	375.9	183.4	(3,244.8)
Corporate expenses	(104.7)	(118.1)	(131.9)
Net interest expense	(120.9)	(143.3)	(81.8)
Loss on early extinguishment of debt	(29.8)	(61.9)	0.0
Income (loss) from investment in Technip Energies	(27.7)	322.2	0.0
Foreign exchange gains (losses)	(23.9)	15.8	(40.2)
Income (loss) before income taxes	68.9	198.1	(3,498.7)
Subsea
Segment Reporting Information [Line Items]
Revenues	5,461.2	5,329.1	5,471.4
Surface Technologies
Segment Reporting Information [Line Items]
Revenues	1,239.2	1,074.4	1,059.2
Operating segments | Subsea
Segment Reporting Information [Line Items]
Revenues	5,461.2	5,329.1	5,471.4
Total segment operating profit	317.6	141.4	(2,815.5)
Operating segments | Surface Technologies
Segment Reporting Information [Line Items]
Revenues	1,239.2	1,074.4	1,059.2
Total segment operating profit	58.3	42.0	(429.3)
Corporate
Segment Reporting Information [Line Items]
Total corporate items	$ (307.0)	$ 14.7	$ (253.9)