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Shareholders' Equity - Fair Value Assumptions (Details) - $ / shares
12 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2019
Class of Stock [Line Items]      
Volatility 25.00% 25.10% 24.80%
Risk-free interest rate 0.40% 0.70% 2.70%
Dividend yield 0.00% 0.00%  
Assumed forfeitures 0.00% 0.00% 0.00%
Expected term (in years) 6 years 2 months 26 days 5 years 11 months 8 days 5 years 11 months 12 days
Weighted-average fair value (in dollars per share) $ 4.90 $ 3.79 $ 0.15
Maximum      
Class of Stock [Line Items]      
Dividend yield     2.30%
Minimum      
Class of Stock [Line Items]      
Dividend yield     1.90%