PROPERTY AND EQUIPMENT, NET - Schedule of property and equipment, net (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Property and Equipment, Net
Total property and equipment	$ 296.4	$ 324.4
Less accumulated depreciation	(187.7)	(215.2)
Property and equipment, net	108.7	109.2
Construction in progress
Property and Equipment, Net
Total property and equipment	0.7	1.5
Furniture and equipment
Property and Equipment, Net
Total property and equipment	$ 295.7	$ 322.9