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Debt - Convertible Notes and the Indenture (Details)
$ / shares in Units, $ in Millions
1 Months Ended 12 Months Ended
May 31, 2024
USD ($)
period
$ / shares
Feb. 28, 2021
USD ($)
Jun. 30, 2026
USD ($)
Jun. 30, 2025
USD ($)
Jun. 30, 2024
USD ($)
Feb. 28, 2026
USD ($)
Line of Credit Facility [Line Items]            
Proceeds from issuance of convertible notes, net of issuance costs     $ 0.0 $ 0.0 $ 342.3  
Net gain on debt refinancing     0.0 0.0 $ 53.6  
5.50% Convertible Senior Notes due 2029 | Convertible senior notes            
Line of Credit Facility [Line Items]            
Principal $ 350.0   $ 350.0 $ 350.0    
Value of shares available for exercise $ 50.0          
Convertible debt, stated interest rate 5.50%   5.50% 5.50%    
Proceeds from issuance of convertible notes, net of issuance costs $ 342.3          
Purchasers' discounts and commissions $ 7.7          
Debt instrument, leverage ratio 0.218436          
Debt instrument, conversion price (in dollars per share) | $ / shares $ 4.58          
Redemption price percentage 100.00%          
Effective interest rate     5.97%      
5.50% Convertible Senior Notes due 2029 | Convertible senior notes | Debt Conversion Terms One            
Line of Credit Facility [Line Items]            
Threshold percentage of stock price trigger 130.00%          
Threshold of trading days | period 20          
Threshold of consecutive trading days | period 30          
0.00% Convertible Senior Notes due 2026 | Convertible senior notes            
Line of Credit Facility [Line Items]            
Principal   $ 1,000.0 $ 199.0 $ 199.0    
Value of shares available for exercise   $ 125.0        
Convertible debt, stated interest rate   0.00% 0.00% 0.00%    
Proceeds from issuance of convertible notes, net of issuance costs $ 801.0 $ 977.2        
Effective interest rate   0.45%        
Debt instrument aggregate cash (724.9)          
Net gain on debt refinancing 69.8          
Deferred debt issuance costs $ 6.3          
Principal payments     $ (199.0) $ 0.0   $ (199.0)