Net Proceeds from Sale Leaseback Transaction, Financing Activities

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Sale Leaseback Transaction, Net Proceeds, Financing Activities, Solar

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DEBT - LONG TERM DEBT (Details) - USD ($) $ in Thousands		9 Months Ended
DEBT - LONG TERM DEBT (Details) - USD ($) $ in Thousands	Apr. 15, 2025	Jun. 30, 2025	Jun. 30, 2024	Nov. 07, 2024
Debt Instrument [Line Items]
Proceeds from sale leaseback transactions - natural gas meters		$ 11,714	$ 8,814
Proceeds from sale leaseback transactions - solar		100,271	24,394
NJR \| Unsecured Senior Notes 5.55% \| Senior Notes
Debt Instrument [Line Items]
Face amount				$ 100,000
Stated interest rate				5.55%
NJNG
Debt Instrument [Line Items]
Proceeds from sale leaseback transactions - natural gas meters		11,700	8,800
NJNG \| Senior notes matured 2.82% \| Senior Notes
Debt Instrument [Line Items]
Stated interest rate	2.82%
Interest rate terms	10-year
Debt instrument repaid principal	$ 50,000
NJRCEV
Debt Instrument [Line Items]
Proceeds from sale leaseback transactions - solar		$ 100,300	$ 24,400