POSTRETIREMENT BENEFITS AND EMPLOYEE STOCK OWNERSHIP PLAN - WEIGHTED AVERAGE ASSUMPTIONS FOR THE BENEFIT CALCULATIONS AS WELL AS ASSUMED HEALTH CARE TREND RATES BALANCE SHEETS (Details)		12 Months Ended
		Jun. 30, 2023	Jun. 30, 2022
Pension Plan
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	[1]	4.20%	3.70%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase	[1]	2.90%	2.80%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Weighted-Average Interest Crediting Rate	[1]	4.30%	4.30%
Other Retiree Benefits
Defined Benefit Plan, Weighted Average Assumptions Used in Calculating Benefit Obligation [Abstract]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	[1]	5.60%	5.00%
Defined Benefit Plan, Assumed Health Care Cost Trend Rates [Abstract]
Defined Benefit Plan, Health Care Cost Trend Rate Assumed, Next Fiscal Year	[1]	6.10%	6.40%
Defined Benefit Plan, Ultimate Health Care Cost Trend Rate	[1]	4.50%	4.50%
Defined Benefit Plan, Year Health Care Cost Trend Rate Reaches Ultimate Trend Rate	[1]	2028	2028

[1] Determined as of end of fiscal year.