GOODWILL AND INTANGIBLE ASSETS - Schedule of Capitalized Software Development (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
Movement in Capitalized Computer Software, Net [Roll Forward]
Beginning balance	$ 13.8	$ 42.5	$ 43.2	$ 38.0
Capitalization	9.8	13.1	28.7	31.1
Amortization	(1.8)	(12.4)	(14.1)	(23.3)
Impairment	0.0	0.0	(9.8)	0.0
Other	(0.9)	(6.1)	(5.5)	(2.6)
Fresh Start Accounting Adjustments	0.0	(23.3)	0.0	0.0
Ending balance	$ 20.9	$ 13.8	$ 42.5	$ 43.2