NONOPERATING EXPENSE, NET (Details) - USD ($) $ in Millions	3 Months Ended	5 Months Ended	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2025	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Remeasurement of Warrant to fair value (Note 11)	$ (75.2)	$ (39.7)	$ (39.7)	$ (75.2)	$ (101.1)
Write-off of unamortized debt discount and debt issuance costs (Note 10)			(35.0)	(35.8)	0.0
Factoring fees			(11.8)	(14.7)	(15.0)
Gain from remeasurement of previously held equity interest (Note 3)			0.0	0.0	15.1
Earnings from equity method investments, net			3.6	4.7	1.8
Net periodic benefit (cost), other than service cost (Note 15)			3.8	2.5	(7.0)
Deconsolidation of subsidiaries (Note 4)			5.2	(57.8)	0.0
Income from transition services agreement			8.4	10.9	0.0
Settlement of tax indemnification			11.3	21.2	(3.5)
Other			(1.6)	(1.7)	0.5
Nonoperating expense, net			$ (55.8)	$ (145.9)	$ (109.2)