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Summary of Significant Accounting Policies - Fair Value Measurements (Details) - USD ($)
$ in Millions
Jun. 30, 2022
Dec. 31, 2021
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Marketable securities $ 148.6  
Recurring basis | Carrying Value    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Cash and cash equivalents 416.1 $ 716.8
Marketable securities 148.6 50.0
Deferred consideration 10.8 14.9
Contingent consideration liabilities 55.6 75.7
Recurring basis | Fair Value | Level 1    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Cash and cash equivalents 416.1 716.8
Marketable securities 148.6 50.0
Deferred consideration 0.0 0.0
Contingent consideration liabilities 0.0 0.0
Recurring basis | Fair Value | Level 2    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Cash and cash equivalents 0.0 0.0
Marketable securities 0.0 0.0
Deferred consideration 10.8 14.9
Contingent consideration liabilities 0.0 0.0
Recurring basis | Fair Value | Level 3    
Fair Value Measurement Inputs and Valuation Techniques [Line Items]    
Cash and cash equivalents 0.0 0.0
Marketable securities 0.0 0.0
Deferred consideration 0.0 0.0
Contingent consideration liabilities $ 55.6 $ 75.7