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GOODWILL AND INTANGIBLE ASSETS - Schedule of Purchased Intangible Assets (Details) - USD ($) $ in Millions | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Gross | $ 2,884.8 | $ 2,813.4
Accumulated Amortization | (977.0) | (915.4)
Net | 1,907.8 | 1,898.0
Purchased data files |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Gross | 1,115.7 | 1,103.1
Accumulated Amortization | (489.5) | (466.0)
Net | 626.2 | 637.1
Customer relationships |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Gross | 854.2 | 805.2
Accumulated Amortization | (372.1) | (354.9)
Net | 482.1 | 450.3
Proprietary database |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Gross | 709.4 | 710.2
Accumulated Amortization | (73.3) | (59.3)
Net | 636.1 | 650.9
Acquired software and technology |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Gross | 165.7 | 160.0
Accumulated Amortization | (23.2) | (18.9)
Net | 142.5 | 141.1
Trade names and other intangible assets |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Gross | 26.2 | 23.9
Accumulated Amortization | (14.5) | (12.6)
Net | 11.7 | 11.3
Non-compete agreements |  |
Acquired Finite-Lived Intangible Assets [Line Items] |  |
Gross | 13.6 | 11.0
Accumulated Amortization | (4.4) | (3.7)
Net | $ 9.2 | $ 7.3

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