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Fair Value Measurements Level 3 (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Mar. 31, 2020
Dec. 31, 2019
Level 3 Fair Value Measurements [Roll Forward]    
Balance, beginning of period $ 3.3 $ 1.7
Increase (decrease) in fair value recorded in earnings 0.0 2.1
Payments (0.1) (0.5)
Balance, end of period $ 3.2 $ 3.3
Measurement Input, Discount Rate [Member]    
Level 3 Fair Value Measurements [Roll Forward]    
Business Combination, Contingent Consideration, Liability, Measurement Input 19.00%  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Business Combination, Contingent Consideration, Liability, Measurement Input 19.00%  
Forecasted Upside Case [Member] | Sales Projections [Member]    
Level 3 Fair Value Measurements [Roll Forward]    
Business Combination, Contingent Consideration, Liability, Measurement Input 10.00%  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Business Combination, Contingent Consideration, Liability, Measurement Input 10.00%  
Minimum [Member] | Probabilities of Successful FDA Approval [Member]    
Level 3 Fair Value Measurements [Roll Forward]    
Business Combination, Contingent Consideration, Liability, Measurement Input 13.00%  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Business Combination, Contingent Consideration, Liability, Measurement Input 13.00%  
Minimum [Member] | Probabilities of Successful Execution of Agreement [Member]    
Level 3 Fair Value Measurements [Roll Forward]    
Business Combination, Contingent Consideration, Liability, Measurement Input 15.00%  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Business Combination, Contingent Consideration, Liability, Measurement Input 15.00%  
Maximum [Member] | Probabilities of Successful FDA Approval [Member]    
Level 3 Fair Value Measurements [Roll Forward]    
Business Combination, Contingent Consideration, Liability, Measurement Input 100.00%  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Business Combination, Contingent Consideration, Liability, Measurement Input 100.00%  
Maximum [Member] | Probabilities of Successful Execution of Agreement [Member]    
Level 3 Fair Value Measurements [Roll Forward]    
Business Combination, Contingent Consideration, Liability, Measurement Input 100.00%  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Business Combination, Contingent Consideration, Liability, Measurement Input 100.00%  
Forecasted Base Case [Member] | Sales Projections [Member]    
Level 3 Fair Value Measurements [Roll Forward]    
Business Combination, Contingent Consideration, Liability, Measurement Input 50.00%  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Business Combination, Contingent Consideration, Liability, Measurement Input 50.00%  
Forecasted Downside Case [Member] | Sales Projections [Member]    
Level 3 Fair Value Measurements [Roll Forward]    
Business Combination, Contingent Consideration, Liability, Measurement Input 40.00%  
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Business Combination, Contingent Consideration, Liability, Measurement Input 40.00%