Quarterly report pursuant to Section 13 or 15(d)

Debt - Narrative (Details)

v3.23.3
Debt - Narrative (Details) - USD ($)
$ / shares in Units, $ in Millions
1 Months Ended 6 Months Ended 9 Months Ended 12 Months Ended
May 15, 2023
Aug. 31, 2022
Jan. 31, 2021
May 31, 2018
Jun. 30, 2022
Sep. 30, 2023
Dec. 31, 2021
Debt Instrument              
Payments to unwind warrants             $ 18.4
2023 convertible senior notes | Convertible Notes              
Debt Instrument              
Interest rate (as a percent)       0.75%      
Principal amount       $ 750.0      
Proceeds from debt, net of issuance costs       733.1      
Debt issuance costs       $ 16.9      
Term of debt instrument       5 years      
Effective interest rate (as a percent)           0.50%  
Total interest expense           $ 0.6  
Contractual interest expense           0.4  
Amortized issuance costs           $ 0.2  
Maturities of debt $ 76.9            
Payment of accrued interest $ 0.3   $ 0.1   $ 0.4   $ 0.3
Securities called by warrants (in shares)       3,018,327     2,559,254
Initial conversion price (in USD per share)       $ 206.65      
Payments for convertible bond hedges       $ 140.3      
Exercise price (dollars per share)       $ 315.38      
Value of warrants issued       $ 90.0      
Repurchased amount of debt instrument     20.3       $ 152.0
Repayments of notes     $ 19.1       $ 156.0
2023 convertible senior notes | Convertible Notes | Notes repurchased in August 2022              
Debt Instrument              
Repayments of notes   $ 223.7          
Repurchased amount of debt instrument   $ 227.8