EMPLOYEE BENEFIT PLANS - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Dec. 31, 2020	Jun. 30, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Mark-to-market loss (gain) net on pension plans			$ 9.4	$ 17.2	$ 9.6
Discount rate	2.47%		2.69%	2.47%	3.19%	4.11%
Settlement		$ 1.1
Fixed income securities
Defined Benefit Plan Disclosure [Line Items]
Plan investment allocation, percentage			0.83%
Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Plan investment allocation, percentage			17.00%
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Discount rate	2.47%		2.69%	2.47%
Curtailment	$ 5.3		$ 0.6	$ 6.4	$ 0.0
Employer contributions to defined benefit plans			$ 8.2
Health Care Benefits
Defined Benefit Plan Disclosure [Line Items]
Discount rate	2.66%		2.85%	2.66%
Curtailment			$ 0.2	$ 0.0	$ 0.0
Employer contributions to defined benefit plans			$ 1.2