COMMITMENTS AND CONTINGENCIES - Insurance Programs (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Health insurance	$ 17.5	$ 15.1
Workers’ compensation	40.3	35.8
Professional liability	5.2	4.9
Estimated Insurance Total	63.0	55.8
Less: long-term portion	(0.2)	(1.2)
Estimated Insurance Excluding Long Term Portion	$ 62.8	$ 54.6