IMPAIRMENT, RESTRUCTURING AND OTHER EXPENSES - Goodwill and Long-Lived Assets Impairments Goodwill and Long-Lived Assets Impairments (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Restructuring and Impairment [Line Items]
Impairments	$ 49.1	$ 3,273.8	$ 2,480.3
Subsea
Restructuring and Impairment [Line Items]
Impairments	44.2	2,854.5	1,794.8
Surface Technologies
Restructuring and Impairment [Line Items]
Impairments	1.9	419.3	685.5
Corporate and other
Restructuring and Impairment [Line Items]
Impairments	$ 3.0	$ 0.0	$ 0.0