DISCONTINUED OPERATIONS - Special Charges (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Restructuring Reserve [Roll Forward]
Balance beginning of period	$ 2.8	$ 2.8
Charged to expense	0.4	0.4
Paid or otherwise settled	(0.5)	(0.4)
Balance end of period	$ 2.7	$ 2.8