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GOODWILL AND OTHER INTANGIBLE ASSETS - Changes in Amount of Goodwill (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Goodwill [Roll Forward] |  |
Beginning Balance | $ 4,308.3 | $ 4,129.7
Acquisitions | 58.3 | 195.9
Adjustments to initial purchase price allocation | 0.3 | 1.3
Foreign currency translation | 128.9 | (18.6)
Ending Balance | 4,495.8 | 4,308.3
U.S. Information Solutions |  |
Goodwill [Roll Forward] |  |
Beginning Balance | 1,280.7 | 1,128.9
Acquisitions | 6.0 | 153.7
Adjustments to initial purchase price allocation | 0.0 | (1.9)
Foreign currency translation | 0.0 | 0.0
Ending Balance | 1,286.7 | 1,280.7
International |  |
Goodwill [Roll Forward] |  |
Beginning Balance | 1,829.2 | 1,844.7
Acquisitions | 52.3 | 2.1
Adjustments to initial purchase price allocation | 0.0 | 3.1
Foreign currency translation | 126.4 | (20.7)
Ending Balance | 2,007.9 | 1,829.2
Workforce Solutions |  |
Goodwill [Roll Forward] |  |
Beginning Balance | 1,010.4 | 970.2
Acquisitions | 0.0 | 40.1
Adjustments to initial purchase price allocation | 0.3 | 0.1
Foreign currency translation | 0.0 | 0.0
Ending Balance | 1,010.7 | 1,010.4
Global Consumer Solutions |  |
Goodwill [Roll Forward] |  |
Beginning Balance | 188.0 | 185.9
Acquisitions | 0.0 | 0.0
Adjustments to initial purchase price allocation | 0.0 | 0.0
Foreign currency translation | 2.5 | 2.1
Ending Balance | $ 190.5 | $ 188.0

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