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ACQUISITIONS (Schedule of Recognized Identified Assets Acquired and Liabilities Assumed) (Details) - USD ($) $ in Millions | Dec. 31, 2023 | Dec. 12, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | May 31, 2021 | May 24, 2021
--- | --- | --- | --- | --- | --- | ---
Business Acquisition [Line Items] |  |  |  |  |  |
Goodwill | $ 2,386.2 |  | $ 2,314.8 | $ 2,321.0 |  |
Deferred income taxes, net | $ (1.0) |  | $ (1.8) |  |  |
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 |  |  |  |
Homes.com |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |
Cash and cash equivalents |  |  |  |  |  | $ 0.0
Accounts receivable |  |  |  |  |  | 1.8
Lease right-of-use assets |  |  |  |  |  | 0.4
Goodwill |  |  |  |  |  | 91.9
Intangible assets |  |  |  |  |  | 53.4
Deferred income taxes, net |  |  |  |  |  | 7.9
Lease liabilities |  |  |  |  |  | (0.4)
Deferred revenue |  |  |  |  |  | (1.5)
Other assets and liabilities |  |  |  |  |  | (1.3)
Fair value of identifiable net assets acquired |  |  |  |  | $ 152.2 | $ 152.2

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