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ALLOWANCE FOR CREDIT LOSSES (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Beginning balance | $ 12.2 | $ 13.4 | $ 15.2
Current-period provision (release) for expected credit losses | 35.0 | 18.3 | 10.9
Write-offs charged against the allowance, net of recoveries and other | (24.0) | (19.5) | (12.7)
Ending balance | 23.2 | 12.2 | 13.4
CoStar |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Beginning balance | 4.5 | 5.4 | 5.6
Current-period provision (release) for expected credit losses | 22.1 | 9.2 | 5.6
Write-offs charged against the allowance, net of recoveries and other | (16.9) | (10.1) | (5.8)
Ending balance | 9.7 | 4.5 | 5.4
Information services |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Beginning balance | 1.1 | 1.8 | 2.7
Current-period provision (release) for expected credit losses | 1.4 | (0.6) | (0.4)
Write-offs charged against the allowance, net of recoveries and other | 0.0 | (0.1) | (0.5)
Ending balance | 2.5 | 1.1 | 1.8
Multifamily |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Beginning balance | 4.3 | 3.4 | 4.4
Current-period provision (release) for expected credit losses | 4.9 | 5.8 | 3.1
Write-offs charged against the allowance, net of recoveries and other | (1.9) | (4.9) | (4.1)
Ending balance | 7.3 | 4.3 | 3.4
LoopNet |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Beginning balance | 1.4 | 2.0 | 1.7
Current-period provision (release) for expected credit losses | 6.0 | 3.8 | 2.6
Write-offs charged against the allowance, net of recoveries and other | (4.7) | (4.4) | (2.3)
Ending balance | 2.7 | 1.4 | 2.0
Other Marketplaces |  |  |
Financing Receivable, Allowance for Credit Loss [Roll Forward] |  |  |
Beginning balance | 0.9 | 0.8 | 0.8
Current-period provision (release) for expected credit losses | 0.6 | 0.1 | 0.0
Write-offs charged against the allowance, net of recoveries and other | (0.5) | 0.0 | 0.0
Ending balance | $ 1.0 | $ 0.9 | $ 0.8

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- Definition Amount, after recovery, of writeoff of financing receivable, charged against allowance for credit loss. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-13 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 79 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479294/326-20-55-79 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph (a) -Subparagraph (4) -Publisher SEC + Details
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- Definition Amount of allowance for credit loss on financing receivable. Excludes allowance for financing receivable covered under loss sharing agreement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(4)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480566/210-10-S99-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph (a) -Subparagraph (1) -Publisher SEC Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph (a) -Subparagraph (3) -Publisher SEC Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name Regulation S-K (SK) -Number 229 -Section 1405 -Paragraph (c) -Publisher SEC Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479344/326-20-45-1 Reference 6: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 942 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(7)(2)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479853/942-210-S99-1 Reference 7: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 11B -Subparagraph (c)(1) -SubTopic 10 -Topic 310 -Publisher FASB -URI https://asc.fasb.org//1943274/2147481962/310-10-50-11B Reference 8: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-13 Reference 9: http://www.xbrl.org/2003/role/disclosureRef -Topic 326 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 13 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479319/326-20-50-13 + Details
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