BUSINESS SEGMENTS - Segment Assets (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Total Assets	$ 10,020.1	$ 19,692.6
Assets from discontinued operations
Segment Reporting Information [Line Items]
Total Assets	0.0	9,008.6
Operating segments
Segment Reporting Information [Line Items]
Total Assets	7,952.5	8,554.9
Operating segments | Subsea
Segment Reporting Information [Line Items]
Total Assets	6,532.5	6,796.6
Operating segments | Surface Technologies
Segment Reporting Information [Line Items]
Total Assets	1,420.0	1,758.3
Corporate
Segment Reporting Information [Line Items]
Total Assets	$ 2,067.6	$ 2,129.1