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DERIVATIVE INSTRUMENTS - VOLUME (Details) - Bcf | 9 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2023 | Sep. 30, 2022
Natural Gas Distribution | Long | Futures |  |
Derivative [Line Items] |  |
Notional amount | 26.0 | 30.5
Natural Gas Distribution | Long | Physical Commodity |  |
Derivative [Line Items] |  |
Notional amount | 3.7 | 6.8
Energy Services | Long | Physical Commodity |  |
Derivative [Line Items] |  |
Notional amount | 2.1 | 2.7
Energy Services | Short | Futures |  |
Derivative [Line Items] |  |
Notional amount | (14.2) | (0.7)

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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 Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 40 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480237/815-40-50-5 + Details
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