BUSINESS SEGMENTS - Segment assets (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
Total Assets	$ 9,656.6	$ 9,444.3
Operating segments
Segment Reporting Information [Line Items]
Total Assets	7,836.9	7,789.6
Operating segments | Subsea
Segment Reporting Information [Line Items]
Total Assets	6,403.4	6,455.1
Operating segments | Surface Technologies
Segment Reporting Information [Line Items]
Total Assets	1,433.5	1,334.5
Corporate
Segment Reporting Information [Line Items]
Total Assets	$ 1,819.7	$ 1,654.7