v3.22.2
Fair Value Measurements - Additional Information (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2022
Dec. 31, 2021
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Equity Securities, Fair Value $ 79.3 $ 79.3 $ 193.2
Unrealized gains (loss) on investments 63.9 156.0  
Marketable securities contractual maturities 233.5 233.5  
Marketable securities 2,500.0 2,500.0  
Level 2 Securities | 2028 Notes      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Convertible notes 1,000.0 1,000.0  
Level 2 Securities | 2027 Notes      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Convertible notes 816.3 816.3 1,100.0
Level 2 Securities | 2025 Notes      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Convertible notes 283.4 283.4 650.1
Level 2 Securities | 2026 Notes      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Convertible notes $ 805.6 $ 805.6 $ 1,900.0
Minimum      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Marketable securities contractual maturities period   1 year  
Maximum      
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]      
Marketable securities contractual maturities period   5 years