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PENSION AND OTHER POSTRETIREMENT PLANS - Weighted-Average Assumptions for Principal Retirement and Other Postretirement Benefit Plans (Details) | 12 Months Ended
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Sep. 30, 2024 | Sep. 30, 2023 | Sep. 30, 2022
Pension |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Discount rate | 3.51% | 4.13% | 4.01%
Other Postretirement |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Discount rate | 4.99% | 5.86% | 5.37%

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- Definition Weighted average rate for present value of future retirement benefits cash flows, used to determine net periodic benefit cost of defined benefit plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (k)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480506/715-20-50-1 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Details
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