INCOME TAXES - Income Tax Expense (Benefit) (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
Current
U.S. federal	$ (1.5)	$ (3.7)	$ 8.5	$ 3.5
Foreign	33.0	14.4	43.3	38.2
State and local	(0.4)	0.0	4.0	(1.2)
Total current	31.1	10.7	55.8	40.5
Deferred
U.S. federal	(27.1)	29.5	62.5	(1.7)
Foreign	(11.7)	42.0	22.4	(11.4)
State and local	(7.0)	8.2	8.5	0.3
Total deferred	(45.8)	79.7	93.4	(12.8)
Income tax expense (benefit)	$ (14.7)	$ 90.4	$ 149.2	$ 27.7