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DERIVATIVE INSTRUMENTS - VOLUME (Details) - Bcf	12 Months Ended
DERIVATIVE INSTRUMENTS - VOLUME (Details) - Bcf	Sep. 30, 2022	Sep. 30, 2021
Natural Gas Distribution \| Long \| Futures
Derivative [Line Items]
Notional amount	30.5	22.2
Natural Gas Distribution \| Long \| Physical commodity contracts
Derivative [Line Items]
Notional amount	6.8	7.6
Energy Services \| Long \| Physical commodity contracts
Derivative [Line Items]
Notional amount	2.7	0.6
Energy Services \| Short \| Futures
Derivative [Line Items]
Notional amount	(0.7)	(13.4)
Energy Services \| Short \| Swaps
Derivative [Line Items]
Notional amount	0	(0.3)