POSTRETIREMENT BENEFITS AND EMPLOYEE STOCK OWNERSHIP PLAN - TARGET AND ACTUAL ASSET ALLOCATION (Details)	Jun. 30, 2022	Jun. 30, 2021
Pension Plan
Target Asset Allocation
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	100.00%
Actual Asset Allocation
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage	100.00%	100.00%
Other Retiree Benefits
Target Asset Allocation
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	100.00%
Actual Asset Allocation
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage	100.00%	100.00%
Cash and Cash Equivalents | Pension Plan
Target Asset Allocation
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	0.00%
Actual Asset Allocation
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage	1.00%	1.00%
Cash and Cash Equivalents | Other Retiree Benefits
Target Asset Allocation
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	2.00%
Actual Asset Allocation
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage	2.00%	2.00%
Debt Securities | Pension Plan
Target Asset Allocation
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	61.00%
Actual Asset Allocation
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage	58.00%	59.00%
Debt Securities | Other Retiree Benefits
Target Asset Allocation
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	2.00%
Actual Asset Allocation
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage	1.00%	2.00%
Equity Securities | Pension Plan
Target Asset Allocation
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	39.00%
Actual Asset Allocation
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage	41.00%	40.00%
Equity Securities | Other Retiree Benefits
Target Asset Allocation
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	96.00%
Actual Asset Allocation
Defined Benefit Plan, Plan Assets, Actual Allocation, Percentage	97.00%	96.00%