SHARE-BASED COMPENSATION AND EQUITY - Share-based Compensation Expense (Details) - USD ($) $ in Millions	5 Months Ended	7 Months Ended	12 Months Ended
	Dec. 31, 2023	Aug. 12, 2023	Dec. 31, 2022	Dec. 31, 2021
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Pre-tax compensation expense	$ 0.1	$ 2.4	$ 13.4	$ 13.8
Acceleration of Predecessor awards	0.0	2.7	0.0	0.0
Tax benefit	0.0	(1.2)	(1.6)	(3.6)
Total share-based compensation, net of tax	0.1	3.9	11.8	10.2
Stock options
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Pre-tax compensation expense	0.1	0.0	0.3	1.5
Tax benefit	0.0	0.0	0.0	(0.4)
Total share-based compensation, net of tax	0.1	0.0	0.3	1.1
RSU's
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Pre-tax compensation expense	0.0	2.3	13.6	8.7
Acceleration of Predecessor awards	0.0	2.7	0.0	0.0
Tax benefit	0.0	(1.2)	(1.6)	(2.2)
Total share-based compensation, net of tax	0.0	3.8	12.0	6.5
Performance shares
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Pre-tax compensation expense	0.0	0.1	(0.5)	3.6
Tax benefit	0.0	0.0	0.0	(1.0)
Total share-based compensation, net of tax	$ 0.0	$ 0.1	$ (0.5)	$ 2.6