v3.26.1
Stock-Based Compensation (Performance Units Grant Date Valuation Assumptions) (Details) - Performance Units [Member]
12 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2024
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Risk-free interest rate 3.65% 3.72% 4.60%
Dividend yield 2.12% 1.98% 1.78%
Volatility factor of the expected market price of our common stock 29.10% 26.40% 24.60%