INCOME TAXES - Unrecognized Tax Benefits (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
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Balance at beginning of the period	$ 52.7	$ 52.1	$ 55.1	$ 36.8
Increases related to prior year tax positions, net	0.0	0.6		42.1
Decreases related to prior year tax positions, net			(1.7)
Increases related to current year tax positions	0.0	0.0	0.0	0.0
Settlements	0.0	0.0	(0.7)	(23.3)
Reductions due to lapse of applicable statute of limitations	(0.1)	0.0	(0.6)	(0.5)
Balance the end of the period	$ 52.6	$ 52.7	$ 52.1	$ 55.1