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GOODWILL AND OTHER INTANGIBLE ASSETS - Purchased Intangible Assets (Details) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021
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Acquired Finite-Lived Intangible Assets [Line Items] |  |
Gross | $ 2,937.1 | $ 2,813.4
Accumulated Amortization | (1,118.6) | (915.4)
Net | 1,818.5 | 1,898.0
Purchased data files |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Gross | 1,090.0 | 1,103.1
Accumulated Amortization | (527.8) | (466.0)
Net | 562.2 | 637.1
Proprietary database |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Gross | 705.9 | 710.2
Accumulated Amortization | (115.0) | (59.3)
Net | 590.9 | 650.9
Customer relationships |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Gross | 874.6 | 805.2
Accumulated Amortization | (407.4) | (354.9)
Net | 467.2 | 450.3
Acquired software and technology |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Gross | 225.4 | 160.0
Accumulated Amortization | (42.6) | (18.9)
Net | 182.8 | 141.1
Trade names and other intangible assets |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Gross | 26.7 | 23.9
Accumulated Amortization | (19.6) | (12.6)
Net | 7.1 | 11.3
Non-compete agreements |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Gross | 14.5 | 11.0
Accumulated Amortization | (6.2) | (3.7)
Net | $ 8.3 | $ 7.3

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