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Stock-Based Compensation (Fair Values of Stock Option Awards Weighted Average Assumptions) (Details)
12 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2019
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]      
Expected Life (in Years) 6 years 6 months 14 days 6 years 6 months 3 days 6 years 6 months
Expected Volatility 39.27% 37.66% 39.60%
Risk-free Interest Rate 0.45% 1.40% 2.73%
Dividend Yield 0.00% 0.00% 0.00%