REVENUE - Schedule of Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Disaggregation of Revenue [Line Items]
Total revenue	$ 2,763.1	$ 2,534.7	$ 5,255.8	$ 4,768.3
Services
Disaggregation of Revenue [Line Items]
Total revenue	1,776.0	1,533.3	3,061.5	2,898.7
Products
Disaggregation of Revenue [Line Items]
Total revenue	987.1	1,001.4	2,194.3	1,869.6
Subsea
Disaggregation of Revenue [Line Items]
Total revenue	2,486.9	2,216.3	4,695.3	4,152.5
Subsea \| Services
Disaggregation of Revenue [Line Items]
Total revenue	1,671.1	1,421.5	2,846.5	2,679.2
Subsea \| Products
Disaggregation of Revenue [Line Items]
Total revenue	815.8	794.8	1,848.8	1,473.3
Subsea \| Latin America
Disaggregation of Revenue [Line Items]
Total revenue	979.1	854.7	1,859.9	1,483.0
Subsea \| Europe and Central Asia
Disaggregation of Revenue [Line Items]
Total revenue	638.1	671.3	1,085.8	1,153.0
Subsea \| Africa
Disaggregation of Revenue [Line Items]
Total revenue	314.9	247.7	717.7	499.7
Subsea \| North America
Disaggregation of Revenue [Line Items]
Total revenue	220.5	250.1	500.9	541.4
Subsea \| Asia Pacific
Disaggregation of Revenue [Line Items]
Total revenue	201.4	115.2	338.6	365.7
Subsea \| Middle East
Disaggregation of Revenue [Line Items]
Total revenue	132.9	77.3	192.4	109.7
Surface Technologies
Disaggregation of Revenue [Line Items]
Total revenue	276.2	318.4	560.5	615.8
Surface Technologies \| Services
Disaggregation of Revenue [Line Items]
Total revenue	104.9	111.8	215.0	219.5
Surface Technologies \| Products
Disaggregation of Revenue [Line Items]
Total revenue	171.3	206.6	345.5	396.3
Surface Technologies \| Latin America
Disaggregation of Revenue [Line Items]
Total revenue	20.6	25.1	39.4	45.7
Surface Technologies \| Europe and Central Asia
Disaggregation of Revenue [Line Items]
Total revenue	32.4	30.6	62.0	58.9
Surface Technologies \| Africa
Disaggregation of Revenue [Line Items]
Total revenue	17.3	14.0	27.9	21.5
Surface Technologies \| North America
Disaggregation of Revenue [Line Items]
Total revenue	105.9	109.8	220.8	226.1
Surface Technologies \| Asia Pacific
Disaggregation of Revenue [Line Items]
Total revenue	22.2	21.0	42.3	43.7
Surface Technologies \| Middle East
Disaggregation of Revenue [Line Items]
Total revenue	$ 77.8	$ 117.9	$ 168.1	$ 219.9