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FAIR VALUE MEASUREMENTS (Change in Fair Value at Level 3) (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Change in Fair Value Measurement Categorized in Level 3 [Roll Forward]    
Transfers out of Level 3 $ 0.0 $ 0.0
Transfers into Level 3 0.0 0.0
Contingent consideration obligation    
Change in Fair Value Measurement Categorized in Level 3 [Roll Forward]    
Balance at beginning of period 21.6 150.5
Settlements 0.0 (5.4)
Unrealized gain included in earnings (3.3) (21.7)
Balance at end of period $ 18.3 $ 123.4