ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) - Changes in Company’s AOCI, Net of Tax, By Component (Details) - USD ($) $ in Millions	5 Months Ended	7 Months Ended	12 Months Ended
	Dec. 31, 2023	Aug. 12, 2023	Dec. 31, 2022
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance	$ 1,052.9	$ (1,371.1)	$ (837.0)
Balance	1,079.2	1,052.9	(1,371.1)
Other comprehensive (loss) income before reclassifications within the translation component, amount excluded		(9.7)
Accumulated Other Comprehensive Income (Loss)
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance	0.0	(360.0)	(378.5)
Other comprehensive (loss) income before reclassifications	13.6	36.9	(32.0)
Amounts reclassified from AOCI	(6.0)	3.1	50.5
Fresh Start Accounting Adjustments		320.0
Net current period other comprehensive income (loss)	7.6	360.0	18.5
Balance	7.6	0.0	(360.0)
Translation
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance	0.0	(352.1)	(310.9)
Other comprehensive (loss) income before reclassifications	14.2	28.7	(41.2)
Amounts reclassified from AOCI	0.0	0.0	0.0
Fresh Start Accounting Adjustments		323.4
Net current period other comprehensive income (loss)	14.2	352.1	(41.2)
Balance	14.2	0.0	(352.1)
Other comprehensive (loss) income before reclassifications within the translation component, amount excluded	(0.2)		(5.9)
Hedges | Foreign exchange forward contracts
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance	0.0	(1.9)	(1.9)
Other comprehensive (loss) income before reclassifications	(0.1)	4.7	0.0
Amounts reclassified from AOCI	0.0	0.0	0.0
Fresh Start Accounting Adjustments		(2.8)
Net current period other comprehensive income (loss)	(0.1)	1.9	0.0
Balance	(0.1)	0.0	(1.9)
Hedges | Interest rate swap
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance	0.0	5.3	0.4
Other comprehensive (loss) income before reclassifications	0.0	3.4	5.5
Amounts reclassified from AOCI	0.0	0.0	(0.6)
Fresh Start Accounting Adjustments		(8.7)
Net current period other comprehensive income (loss)	0.0	(5.3)	4.9
Balance	0.0	0.0	5.3
Pension and Other Post-Retirement Benefits
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance	0.0	(12.6)	(64.6)
Other comprehensive (loss) income before reclassifications	(0.1)	0.1	0.9
Amounts reclassified from AOCI	(6.0)	3.1	51.1
Fresh Start Accounting Adjustments		9.4
Net current period other comprehensive income (loss)	(6.1)	12.6	52.0
Balance	(6.1)	0.0	(12.6)
Other
AOCI Including Portion Attributable to Noncontrolling Interest, Net of Tax [Roll Forward]
Balance	0.0	1.3	(1.5)
Other comprehensive (loss) income before reclassifications	(0.4)	0.0	2.8
Amounts reclassified from AOCI	0.0	0.0	0.0
Fresh Start Accounting Adjustments		(1.3)
Net current period other comprehensive income (loss)	(0.4)	(1.3)	2.8
Balance	$ (0.4)	$ 0.0	$ 1.3