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GOODWILL AND INTANGIBLE ASSETS - Schedule of Summary of Changes in Goodwill (Details)
$ in Millions
9 Months Ended
Sep. 30, 2021
USD ($)
Goodwill [Roll Forward]  
Goodwill, Beginning Balance $ 336.7
Acquisition activity 8.0
Translation and other (0.4)
Goodwill, Ending Balance $ 344.3