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FAIR VALUE MEASUREMENTS - Schedule of Changes in Fair Value of Contingent Consideration and Other Liability (Details) - Fair Value on a Recurring Basis - Level 3 - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance $ 40.2 $ 76.0
Changes in fair value (29.9) (36.3)
Ending balance 10.3 39.7
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 (26.2) (36.3)
Ending balance 0.0 25.7
Other    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance 14.0 14.0
Changes in fair value (3.7) 0.0
Ending balance $ 10.3 $ 14.0