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Debt - Conversion Value of Convertible Notes (Details) - Senior Notes - USD ($)
$ in Millions
 3 Months Ended 12 Months Ended
Mar. 31, 2024
Dec. 31, 2023
Debt Instrument [Line Items]    
Total by which the notes’ if-converted value exceeds their principal amount $ 209.2 $ 89.7
Senior Convertible Notes due 2025    
Debt Instrument [Line Items]    
Total by which the notes’ if-converted value exceeds their principal amount 105.4 56.1
Senior Convertible Notes due 2028    
Debt Instrument [Line Items]    
Total by which the notes’ if-converted value exceeds their principal amount $ 103.8 $ 33.6