REVENUE - Disaggregation of revenue, geographical (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disaggregation of Revenue [Line Items]
Lease	$ 273.5	$ 215.1	$ 158.4
Total revenue	7,824.2	6,700.4	6,403.5
Service revenue
Disaggregation of Revenue [Line Items]
Product and service revenue	4,283.3	3,628.3	3,440.7
Product revenue
Disaggregation of Revenue [Line Items]
Product and service revenue	3,267.4	2,857.0	2,804.4
Subsea
Disaggregation of Revenue [Line Items]
Lease	98.0	57.0	44.6
Total revenue	6,434.8	5,461.2	5,329.1
Subsea | Service revenue
Disaggregation of Revenue [Line Items]
Product and service revenue	4,072.7	3,410.4	3,282.0
Subsea | Product revenue
Disaggregation of Revenue [Line Items]
Product and service revenue	2,264.1	1,993.8	2,002.5
Subsea | Europe, Central Asia
Disaggregation of Revenue [Line Items]
Total revenue	1,927.4	1,550.1	1,404.4
Subsea | Latin America
Disaggregation of Revenue [Line Items]
Total revenue	2,182.9	1,460.1	1,157.7
Subsea | Africa
Disaggregation of Revenue [Line Items]
Total revenue	920.8	865.6	1,057.3
Subsea | North America
Disaggregation of Revenue [Line Items]
Total revenue	1,064.2	780.6	753.6
Subsea | Asia Pacific
Disaggregation of Revenue [Line Items]
Total revenue	331.3	687.5	927.4
Subsea | Middle East
Disaggregation of Revenue [Line Items]
Total revenue	8.2	117.3	28.7
Surface Technologies
Disaggregation of Revenue [Line Items]
Lease	175.5	158.1	113.8
Total revenue	1,389.4	1,239.2	1,074.4
Surface Technologies | Service revenue
Disaggregation of Revenue [Line Items]
Product and service revenue	210.6	217.9	158.7
Surface Technologies | Product revenue
Disaggregation of Revenue [Line Items]
Product and service revenue	1,003.3	863.2	801.9
Surface Technologies | Europe, Central Asia
Disaggregation of Revenue [Line Items]
Total revenue	198.5	166.7	191.5
Surface Technologies | Latin America
Disaggregation of Revenue [Line Items]
Total revenue	122.9	112.1	86.7
Surface Technologies | Africa
Disaggregation of Revenue [Line Items]
Total revenue	49.1	37.6	44.0
Surface Technologies | North America
Disaggregation of Revenue [Line Items]
Total revenue	574.1	552.0	372.7
Surface Technologies | Asia Pacific
Disaggregation of Revenue [Line Items]
Total revenue	95.2	97.2	104.2
Surface Technologies | Middle East
Disaggregation of Revenue [Line Items]
Total revenue	$ 349.6	$ 273.6	$ 275.3