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Pension Plans and Other Postretirement Benefit Plan - Schedule of Allocation of Plan Assets (Details) | Jun. 30, 2024 | Jun. 30, 2023
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Defined Benefit Plan Disclosure [Line Items] |  |
Defined benefit plan, plan assets, actual allocation, percentage | 100.00% | 100.00%
Fixed income securities |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined benefit plan, plan assets, actual allocation, percentage | 72.00% | 75.00%
Defined benefit plan, plan assets, target allocation, percentage | 100.00% | 100.00%
Cash equivalents |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Defined benefit plan, plan assets, actual allocation, percentage | 28.00% | 25.00%

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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 + Details
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- Definition 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 + Details
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