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FAIR VALUE MEASUREMENTS - Changes in Fair Value of Contingent Consideration Obligation (Details) - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2022
Sep. 30, 2021
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance $ 76.0 $ 186.1
Additions   14.0
Changes in fair value (36.3) (106.0)
Ending balance 39.7 94.1
Contingent Consideration    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance 62.0 186.1
Additions   0.0
Changes in fair value (36.3) (106.0)
Ending balance 25.7 80.1
Other liability    
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]    
Beginning balance 14.0 0.0
Additions   14.0
Changes in fair value 0.0 0.0
Ending balance $ 14.0 $ 14.0