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RELATED PARTY TRANSACTIONS - ADDITIONAL INFORMATION (Details) $ in Millions |  | 1 Months Ended | 9 Months Ended
--- | --- | --- | ---
Jan. 03, 2025 dth / d | Mar. 31, 2025 Bcf | Apr. 30, 2020 USD ($) Bcf | Jun. 30, 2025 numberOfAgreement dth / d Bcf
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] |  |  |  |
Asset management agreement, period |  | 2 years |  |
Natural gas sold at cost under asset management agreement (in Bcf) | Bcf |  | 3 | 3 |
Approximate annual demand fees under agreement | $ |  |  | $ 6.5 |
NJNG to Adelphia Affiliate |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Number of transportation agreements | numberOfAgreement |  |  |  | 2
Transportation capacity under precedent agreement (in bcf per day) | 10,000 |  |  |
NJNG to Adelphia Affiliate | Transportation Precedent Agreement One |  |  |  |
Related Party Transaction [Line Items] |  |  |  |
Transportation capacity under precedent agreement (in bcf per day) |  |  |  | 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) |  |  |  | 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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