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Share-based Compensation - Employee Compensation Plans (Details)
shares in Millions, $ in Millions
9 Months Ended 12 Months Ended
Mar. 31, 2020
USD ($)
ShareBasedCompensationPlan
shares
Jun. 30, 2019
Stock-based Compensation    
Number of share-based employee compensation plans | ShareBasedCompensationPlan 2  
Aggregate number of shares authorized for issuance 6.5  
Shares for future issuances 1.2  
Total unrecognized compensation cost related to non-vested share-based compensation awards granted under the Plans | $ $ 11.4  
Weighted average period during which the cost is expected to be recognized 2 years 3 months 18 days  
Maximum    
Stock-based Compensation    
Share-based compensation awards vesting period 4 years 3 years
Share-based compensation awards maximum contractual term 10 years