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Stock-Based Compensation (Performance Units Grant Date Valuation Assumptions) (Details) - Performance Units [Member]
12 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Risk-free interest rate 4.60% 3.18% 0.41%
Dividend yield 1.78% 2.08% 1.65%
Volatility factor of the expected market price of our common stock 24.60% 32.20% 31.30%