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DEBT - LONG TERM DEBT (Details) - USD ($) | 3 Months Ended |
--- | --- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Oct. 24, 2022
Debt Instrument [Line Items] |  |  |
Proceeds from sale leaseback transactions - natural gas meters | $ 8,441,000 | $ 17,300,000 |
Proceeds from sale leaseback transactions - solar | 33,150,000 | 3,300,000 |
Clean Energy Ventures |  |  |
Debt Instrument [Line Items] |  |  |
Proceeds from sale leaseback transactions - solar | $ 33,200,000 | 3,300,000 |
Clean Energy Ventures | Minimum |  |  |
Debt Instrument [Line Items] |  |  |
Sale leaseback transaction lease term | 5 years |  |
Clean Energy Ventures | Maximum |  |  |
Debt Instrument [Line Items] |  |  |
Sale leaseback transaction lease term | 15 years |  |
NJNG |  |  |
Debt Instrument [Line Items] |  |  |
Proceeds from sale leaseback transactions - natural gas meters | $ 8,400,000 | 17,300,000 |
Payments for sale leaseback transaction | $ 0 | $ 1,100,000 |
NJR | Senior Notes | Unsecured Senior Notes 6.14%, Maturing in 2032 |  |  |
Debt Instrument [Line Items] |  |  |
Debt issued |  |  | $ 50,000,000
Stated interest rate |  |  | 6.14%
NJNG | Senior Notes | Unsecured Senior Notes 5.47%, Maturing in 2052 |  |  |
Debt Instrument [Line Items] |  |  |
Stated interest rate |  |  | 5.47%
Face amount |  |  | $ 125,000,000

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