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Fair Value Measurements - Level 3 (Details) - Liability
$ in Millions
6 Months Ended
Jun. 30, 2020
USD ($)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]  
Beginning balance $ 0.0
Newly issued 1.1
Change in revaluation of contingent consideration included in earnings 0.0
Exercises/settlements 0.0
Ending balance (1) $ 1.1