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FAIR VALUE MEASUREMENTS - Changes in Fair Value of Contingent Consideration Obligation (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance $ 40.2 $ 76.0
Changes in fair value 0.7 (2.9)
Ending balance 40.9 73.1
Contingent Consideration    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance 26.2 62.0
Changes in fair value 0.7 (2.9)
Ending balance 26.9 59.1
Other liability    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance 14.0 14.0
Changes in fair value 0.0 0.0
Ending balance $ 14.0 $ 14.0