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PROPERTY AND EQUIPMENT (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended	12 Months Ended
	Oct. 31, 2022	Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment [Line Items]
Property and equipment, gross		$ 406.8	$ 577.7	$ 406.8
Accumulated depreciation and amortization		(85.5)	(105.5)	(85.5)
Property and equipment, net		321.3	472.2	321.3
Depreciation expense for property and equipment			33.8	29.1	$ 29.0
Depreciated assets written-off			14.1	27.6
Proceeds from sale of property and equipment and other assets			0.0	30.1	$ 0.6
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property and equipment, gross		108.9	87.8	108.9
Furniture, office equipment and vehicles
Property, Plant and Equipment [Line Items]
Property and equipment, gross		52.6	73.4	52.6
Computer hardware and software
Property, Plant and Equipment [Line Items]
Property and equipment, gross		43.8	56.3	43.8
Aircrafts
Property, Plant and Equipment [Line Items]
Property and equipment, gross		44.2	44.2	44.2
Proceeds from sale of property and equipment and other assets	$ 24.9
Gain (loss) on disposition of assets		3.3
Land
Property, Plant and Equipment [Line Items]
Property and equipment, gross		52.2	52.2	52.2
Buildings
Property, Plant and Equipment [Line Items]
Property and equipment, gross		$ 105.1	$ 263.8	$ 105.1

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