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FAIR VALUE MEASUREMENTS (Change in Fair Value at Level 3) (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Change in Fair Value Measurement Categorized in Level 3 [Roll Forward]        
Transfers out of Level 3 $ 0.0 $ 0.0 $ 0.0 $ 0.0
Transfers into Level 3 0.0 0.0 0.0 0.0
Contingent consideration obligation        
Change in Fair Value Measurement Categorized in Level 3 [Roll Forward]        
Balance at beginning of period 18.3 123.4 21.6 150.5
Settlements (18.8) (78.2) (18.8) (83.6)
Unrealized loss (gain) included in earnings 0.5 (27.7) (2.8) (49.4)
Balance at end of period $ 0.0 $ 17.5 $ 0.0 $ 17.5