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FAIR VALUE MEASUREMENTS - Schedule of Change in Contingent Consideration Liability (Details) - Level 3 - Fair value, measurements, recurring - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance $ 13.4 $ 95.8
Unrealized gains, included in earnings 0.0 (49.6)
Ending balance $ 13.4 $ 46.2