REVENUE - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2024	Mar. 31, 2023
Disaggregation of Revenue [Line Items]
Lease revenue	$ 62.3	$ 54.2
Total revenue	2,042.0	1,717.4
Services
Disaggregation of Revenue [Line Items]
Revenue	1,165.8	868.1
Products
Disaggregation of Revenue [Line Items]
Revenue	813.9	795.1
Subsea
Disaggregation of Revenue [Line Items]
Revenue	1,734.8	1,387.6
Subsea \| Operating Segments
Disaggregation of Revenue [Line Items]
Lease revenue	19.7	7.5
Total revenue	1,734.8	1,387.6
Subsea \| Services \| Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	1,117.5	815.3
Subsea \| Products \| Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	597.6	564.8
Subsea \| Latin America
Disaggregation of Revenue [Line Items]
Revenue	676.8	440.4
Subsea \| Europe and Central Asia
Disaggregation of Revenue [Line Items]
Revenue	358.9	378.5
Subsea \| North America
Disaggregation of Revenue [Line Items]
Revenue	317.0	249.9
Subsea \| Africa
Disaggregation of Revenue [Line Items]
Revenue	295.7	210.5
Subsea \| Asia Pacific
Disaggregation of Revenue [Line Items]
Revenue	91.0	71.9
Subsea \| Middle East
Disaggregation of Revenue [Line Items]
Revenue	(4.6)	36.4
Surface Technologies
Disaggregation of Revenue [Line Items]
Revenue	307.2	329.8
Surface Technologies \| Operating Segments
Disaggregation of Revenue [Line Items]
Lease revenue	42.6	46.7
Total revenue	307.2	329.8
Surface Technologies \| Services \| Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	48.3	52.8
Surface Technologies \| Products \| Operating Segments
Disaggregation of Revenue [Line Items]
Revenue	216.3	230.3
Surface Technologies \| Latin America
Disaggregation of Revenue [Line Items]
Revenue	25.3	27.2
Surface Technologies \| Europe and Central Asia
Disaggregation of Revenue [Line Items]
Revenue	36.7	44.2
Surface Technologies \| North America
Disaggregation of Revenue [Line Items]
Revenue	125.1	146.1
Surface Technologies \| Africa
Disaggregation of Revenue [Line Items]
Revenue	12.8	9.7
Surface Technologies \| Asia Pacific
Disaggregation of Revenue [Line Items]
Revenue	23.2	17.9
Surface Technologies \| Middle East
Disaggregation of Revenue [Line Items]
Revenue	$ 84.1	$ 84.7

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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