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LEASES (Lease Cost) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Operating lease costs: |  |  |
Total operating lease costs | $ 35.7 | $ 33.6 | $ 34.8
Finance lease costs: |  |  |
Amortization of ROU assets | 0.8 | 0.0 | 0.0
Interest on lease liabilities | 0.2 | 0.0 | 0.0
Total finance lease costs | 1.0 | 0.0 | 0.0
Total lease costs | 36.7 | 33.6 | 34.8
Cost of revenues |  |  |
Operating lease costs: |  |  |
Total operating lease costs | 10.0 | 8.4 | 10.1
Software development |  |  |
Operating lease costs: |  |  |
Total operating lease costs | 6.3 | 7.2 | 6.9
Selling and marketing (excluding customer base amortization) |  |  |
Operating lease costs: |  |  |
Total operating lease costs | 15.4 | 12.6 | 11.9
General and administrative |  |  |
Operating lease costs: |  |  |
Total operating lease costs | $ 4.0 | $ 5.4 | $ 5.9

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- Definition Amount of interest expense on finance lease liability. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 53 -Publisher FASB -URI https://asc.fasb.org//1943274/2147479589/842-20-55-53 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 45 -Paragraph 4 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479041/842-20-45-4 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 842 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org//1943274/2147478964/842-20-50-4 + Details
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