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Fair Value of Financial Instruments - Changes in Contingent Consideration (Details)
$ in Millions
3 Months Ended
Mar. 31, 2020
USD ($)
Business Combination, Contingent Consideration, Liability [Roll Forward]  
Beginning balance $ 17.4
Acquisitions 0.0
Measurement adjustments recorded to earnings (0.3)
Foreign currency translation adjustment (1.0)
Ending balance $ 16.1