ACQUISITIONS (Schedule of Recognized Identified Assets Acquired and Liabilities Assumed) (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023	Dec. 12, 2023	Dec. 31, 2022
Business Acquisition [Line Items]
Goodwill	$ 2,383.6	$ 2,386.2		$ 2,314.8
OnTheMarket
Business Acquisition [Line Items]
Cash and cash equivalents			$ 18.2
Accounts receivable			2.3
Goodwill			62.8
Intangible assets			55.2
Accrued expenses			(12.7)
Accrued wages and commissions			(2.0)
Deferred income taxes, net			(3.0)
Other assets and liabilities			(0.4)
Fair value of identifiable net assets acquired			$ 120.4