PROPERTY, PLANT, AND EQUIPMENT - Severance Liability (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Property, Plant and Equipment [Abstract]
Severance liability at January 1	$ 0.0	$ 0.0	$ 2.8
Severance expense	1.6	0.0	0.0
Severance payments	0.0	0.0	(1.5)
Other	0.0	0.0	(1.3)
Severance liability at December 31	$ 1.6	$ 0.0	$ 0.0