REGULATION - ADDITIONAL INFORMATION (Details) - USD ($) $ in Millions					3 Months Ended
	Dec. 18, 2024	Dec. 17, 2024	Nov. 21, 2024	Oct. 30, 2024	Dec. 31, 2024
Schedule of Regulatory Filings [Line Items]
Annual recoveries				$ 12.3
Base Rate Stipulation
Schedule of Regulatory Filings [Line Items]
Weighted average cost of capital			7.08%		7.08%
Approved return on equity			9.60%
BPU
Schedule of Regulatory Filings [Line Items]
Approved return on equity					9.60%
Total amount				385.6
Approved equity capital structure, percentage			54.00%
Public utilities, approved depreciation rate, percentage			3.21%
BPU | NJNG
Schedule of Regulatory Filings [Line Items]
Approved rate increase (decrease), amount			$ 157.0
Investment		$ 700.0
Program term		3 years
SAVEGREEN
Schedule of Regulatory Filings [Line Items]
Capital investments approved by the BPU	$ 3.1			205.0
Financing options				160.5
Operations and maintenance expense				$ 20.1