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Fair Value Measurements - Level 3 Liabilities (Details) - Contingent Consideration - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Jun. 30, 2023
Dec. 31, 2022
Jun. 30, 2022
Dec. 31, 2021
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]                
Balance as of beginning of period $ 0.0 $ 30.3 $ 0.0 $ 30.3 $ 0.0 $ 30.9 $ 29.9 $ 54.7
Payment 0.0 0.0 (30.9) (30.5)        
Change in fair value, recognized in earnings 0.0 0.4 0.0 6.1        
Balance as of end of period $ 0.0 $ 30.3 $ 0.0 $ 30.3