LONG-TERM COMPENSATION PLANS - Schedule of Compensation Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award
Share-based compensation	$ 9.4	$ 17.7	$ 40.1
Unrecognized compensation expense for awards expected to vest	$ 16.5
Weighted average remaining vesting period (months)	26 years
RSUs
Share-based Compensation Arrangement by Share-based Payment Award
Share-based compensation	$ 9.3	17.4	39.6
Weighted average remaining vesting period (months)	26 months
Stock options
Share-based Compensation Arrangement by Share-based Payment Award
Share-based compensation	$ 0.1	$ 0.3	$ 0.5