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POSTRETIREMENT BENEFITS AND EMPLOYEE STOCK OWNERSHIP PLAN - Weighted Average Assumptions For The Benefit Calculations As Well As Assumed Health Care Trend Rates Statement Of Earnings (Details)
 12 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2023
Pension Benefits      
Defined Benefit Plan Disclosure [Line Items]      
Discount rate (in percent) 4.20% 4.20% 3.70%
Expected return on plan assets (in percent) 6.00% 6.00% 5.90%
Rate of compensation increase (in percent) 2.80% 2.90% 2.80%
Interest crediting rate for cash balance plans (in percent) 4.70% 4.30% 4.30%
Other Retiree Benefits      
Defined Benefit Plan Disclosure [Line Items]      
Discount rate (in percent) 5.80% 5.60% 5.00%
Expected return on plan assets (in percent) 8.50% 8.50% 8.40%