PROPERTY, PLANT AND EQUIPMENT - Lease Disclosure (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Finance Lease Cost:
Amortization of ROU assets	$ 0.2	$ 0.3
Interest on lease liabilities	0.1	0.1
Operating Lease Cost	33.7	38.9
Total Lease Cost	34.0	39.3
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from finance leases	0.1	0.1
Operating cash flows from operating leases	36.3	36.3
Financing cash flows from finance leases	0.3	0.2
ROU assets for finance leases	0.3	0.6
ROU assets for operating leases	71.0	86.3
Accumulated amortization on ROU assets for finance leases	0.8	0.6
Accumulated amortization on ROU assets for operating leases	$ 55.9	$ 39.9
Weighted-average remaining lease term - finance leases	1 year 1 month 6 days	2 years 1 month 6 days
Weighted-average remaining lease term - operating leases	6 years 2 months 12 days	6 years 6 months
Weighted-average discount rate - finance leases	15.00%	15.00%
Weighted-average discount rate - operating leases	15.80%	15.80%