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ACQUISITIONS (Intangible Assets Acquired) (Details) - USD ($) $ in Millions |  | 1 Months Ended
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May 24, 2021 | Dec. 31, 2023
OnTheMarket |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Estimated Fair Value |  | $ 55.2
OnTheMarket | Customer base |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Estimated Fair Value |  | $ 42.0
Estimated Useful Life |  | 8 years
OnTheMarket | Trade name |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Estimated Fair Value |  | $ 10.2
Estimated Useful Life |  | 15 years
OnTheMarket | Technology |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Estimated Fair Value |  | $ 3.0
Estimated Useful Life |  | 2 years
Homes.com |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Estimated Fair Value | $ 53.4 |
Homes.com | Customer base |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Estimated Fair Value | $ 32.0 |
Estimated Useful Life | 8 years |
Homes.com | Trade name |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Estimated Fair Value | $ 21.0 |
Estimated Useful Life | 15 years |
Homes.com | Technology |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Estimated Fair Value | $ 0.4 |
Estimated Useful Life | 2 years |

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, from an acquisition. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 350 -SubTopic 30 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482665/350-30-50-1 + Details
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