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Fair Value Measurements - Narrative (Details) - USD ($)
$ in Millions
Mar. 31, 2022
Dec. 31, 2021
Level 3    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Equity securities, FV-NI $ 5.6 $ 5.6
2026 Notes    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Convertible debt, fair value disclosures 659.5  
2026 Notes | Convertible Debt    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt instrument, face amount $ 695.8  
Debt instrument, interest rate, stated percentage 0.00%  
2028 Notes    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Convertible debt, fair value disclosures $ 656.9  
2028 Notes | Convertible Debt    
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]    
Debt instrument, face amount $ 693.3  
Debt instrument, interest rate, stated percentage 0.00%