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DERIVATIVE INSTRUMENTS - VOLUME (Details) - Bcf | Mar. 31, 2021 | Sep. 30, 2020
--- | --- | ---
Natural Gas Distribution | Long | Futures |  |
Derivative [Line Items] |  |
Notional amount | 22.1 | 23.7
Natural Gas Distribution | Long | Physical Commodity |  |
Derivative [Line Items] |  |
Notional amount | 16.6 | 6.0
Energy Services | Long | Physical Commodity |  |
Derivative [Line Items] |  |
Notional amount |  | 5.0
Energy Services | Short | Futures |  |
Derivative [Line Items] |  |
Notional amount | 11.6 | 27.5
Energy Services | Short | Physical Commodity |  |
Derivative [Line Items] |  |
Notional amount | 1.5 |
Energy Services | Short | Swaps |  |
Derivative [Line Items] |  |
Notional amount | 0.8 | 1.8

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