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Income Taxes - Additional Information (Details) - USD ($)
$ in Millions
 12 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2020
Operating Loss Carryforwards [Line Items]      
Unrecognized tax benefits that would impact effective tax rate $ 0.0    
Accrued interest and penalties related to unrecognized tax benefits 0.0 $ 0.0 $ 0.0
Domestic Tax Authority      
Operating Loss Carryforwards [Line Items]      
Increase (decrease) in valuation allowance 668.5    
Net operating loss carryforwards 3,405.9    
NOL carryforwards subject to annual utilization limitation 42.0    
Domestic Tax Authority | Research Tax Credit Carryforward      
Operating Loss Carryforwards [Line Items]      
Tax credit carryforwards 82.0    
Foreign Tax Authority      
Operating Loss Carryforwards [Line Items]      
Increase (decrease) in valuation allowance (10.1)    
Net operating loss carryforwards 65.8    
State and Local Jurisdiction      
Operating Loss Carryforwards [Line Items]      
Net operating loss carryforwards 3,590.4    
Tax credit carryforwards 2.6    
NOL carryforwards subject to annual utilization limitation 36.4    
State and Local Jurisdiction | Research Tax Credit Carryforward      
Operating Loss Carryforwards [Line Items]      
Tax credit carryforwards $ 37.7