POSTRETIREMENT BENEFITS AND EMPLOYEE STOCK OWNERSHIP PLAN - Target And Actual Asset Allocation (Details)	Jun. 30, 2024	Jun. 30, 2023
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Target Asset Allocation (in percent)	100.00%
Actual Asset Allocation (in percent)	100.00%	100.00%
Other Retiree Benefits
Defined Benefit Plan Disclosure [Line Items]
Target Asset Allocation (in percent)	100.00%
Actual Asset Allocation (in percent)	100.00%	100.00%
Cash \| Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Target Asset Allocation (in percent)	1.00%
Actual Asset Allocation (in percent)	2.00%	1.00%
Cash \| Other Retiree Benefits
Defined Benefit Plan Disclosure [Line Items]
Target Asset Allocation (in percent)	2.00%
Actual Asset Allocation (in percent)	2.00%	2.00%
Debt securities \| Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Target Asset Allocation (in percent)	61.00%
Actual Asset Allocation (in percent)	61.00%	60.00%
Debt securities \| Other Retiree Benefits
Defined Benefit Plan Disclosure [Line Items]
Target Asset Allocation (in percent)	1.00%
Actual Asset Allocation (in percent)	1.00%	1.00%
Equity securities \| Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Target Asset Allocation (in percent)	38.00%
Actual Asset Allocation (in percent)	37.00%	39.00%
Equity securities \| Other Retiree Benefits
Defined Benefit Plan Disclosure [Line Items]
Target Asset Allocation (in percent)	97.00%
Actual Asset Allocation (in percent)	97.00%	97.00%

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- Definition

Percentage of target investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 55
-Paragraph 17
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480482/715-20-55-17

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (d)(i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-1

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Percentage of actual investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 715
-SubTopic 20
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (d)(i)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480506/715-20-50-1

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