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RELATED PARTY TRANSACTIONS - ADDITIONAL INFORMATION (Details) $ in Millions |  | 6 Months Ended
--- | --- | ---
Apr. 01, 2020 USD ($) Bcf | Mar. 31, 2024 dth / d numberOfAgreement agreement Bcf
Related Party Transaction [Line Items] |  |
Number of asset management agreements | agreement |  | 1
NJNG to NJRES Affiliate |  |
Related Party Transaction [Line Items] |  |
Asset management agreement, period | 5 years |
NJNG to Steckman RIdge Affiliate |  |
Related Party Transaction [Line Items] |  |
Natural gas sold at cost under asset management agreement (in Bcf) | Bcf | 3 |
Approximate annual demand fees under agreement | $ | $ 9.3 |
NJNG to Adelphia Affiliate |  |
Related Party Transaction [Line Items] |  |
Number of transportation agreements | numberOfAgreement |  | 2
NJNG to Adelphia Affiliate | Transportation Precedent Agreement One |  |
Related Party Transaction [Line Items] |  |
Transportation capacity under precedent agreement (in bcf per day) | dth / d |  | 130,000
Transportation precedent agreement term |  | 5 years
NJNG to Adelphia Affiliate | Transportation Precedent Agreement Two |  |
Related Party Transaction [Line Items] |  |
Transportation capacity under precedent agreement (in bcf per day) | dth / d |  | 130,000
Transportation precedent agreement term |  | 15 years
Leaf River Energy Center LLC |  |
Related Party Transaction [Line Items] |  |
Natural gas sold at cost under asset management agreement (in Bcf) | Bcf |  | 3
Storage capacity agreement term |  | 5 years
NJNG and Clean Energy Ventures to PPA | Sublease Agreement One |  |
Related Party Transaction [Line Items] |  |
Sublease agreement term |  | 15 years
NJNG and Clean Energy Ventures to PPA | Sublease Agreement Two |  |
Related Party Transaction [Line Items] |  |
Sublease agreement term |  | 20 years
NJNG To NJR Subsidiaries |  |
Related Party Transaction [Line Items] |  |
Term of contract |  | 16 years

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- Definition Agreement between subsidiaries as a result of gas storage sold under asset management agreement + References No definition available. + Details
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