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Income Tax (Details) - USD ($)
$ in Thousands
 12 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2022
Operating Loss Carryforwards [Line Items]        
Income tax expense (benefit) $ 84,107 $ (49,362) $ 155,493  
Unrecognized Tax Benefits 11,944 $ 14,654 $ 15,624 $ 12,996
Unrecognized Tax Benefits that Would Impact Effective Tax Rate $ 375      
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Percent 4.70% 1.40% (6.00%)  
Effective Income Tax Rate Reconciliation, Tax Credit, Other, Percent 2.60% 3.10% (24.10%)  
Effective Income Tax Rate Reconciliation,Other Reconciling Items, Percent 2.90% 0.40% (5.10%)  
SWITZERLAND        
Operating Loss Carryforwards [Line Items]        
Income tax expense (benefit) $ 26,804      
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount 141,872 $ 105,765    
Minimum [Member]        
Operating Loss Carryforwards [Line Items]        
Unrecognized Tax Benefits, Period Increase (Decrease) 350      
Maximum [Member]        
Operating Loss Carryforwards [Line Items]        
Unrecognized Tax Benefits, Period Increase (Decrease) $ 450      
Derivative Financial Instruments, Assets [Member]        
Operating Loss Carryforwards [Line Items]        
Effective Income Tax Rate Reconciliation,Other Reconciling Items, Percent (4.00%) (2.10%) 3.10%  
Intellectual Property [Member]        
Operating Loss Carryforwards [Line Items]        
Effective Income Tax Rate Reconciliation,Other Reconciling Items, Percent 0.00% 0.00% 1.00%  
Interest Expense [Member]        
Operating Loss Carryforwards [Line Items]        
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Percent 12.70% 5.60% (30.20%)  
Federal Act on Tax Reform and AHV Financing (TRAF) [Member]        
Operating Loss Carryforwards [Line Items]        
Effective Income Tax Rate Reconciliation, Tax Credit, Other, Percent 0.00% 0.00% 4.00%