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Equity-Based Compensation (Weighted Average Assumptions Used for Estimated Fair Value of Stock Option Grants) (Details)
12 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]    
Expected volatility 26.66% 26.50%
Risk-free interest rate 1.43% 2.41%
Expected dividend yield 1.46% 1.12%
Expected term of stock options 3 years 9 months 29 days 3 years 10 months 2 days