REGULATION - REGULATORY FILINGS (Details) - Natural Gas Distribution $ in Millions							3 Months Ended	5 Months Ended	6 Months Ended
	Jul. 17, 2019 USD ($)	Jul. 02, 2019 USD ($)	Jun. 24, 2019 USD ($)	May 31, 2019 USD ($)	Mar. 29, 2019 USD ($)	Feb. 28, 2019 USD ($) project_component	Jun. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)
Schedule of Regulatory Filings [Line Items]
Requested rate increase (decrease), amount					$ 128.2
Energy Efficiency EE
Schedule of Regulatory Filings [Line Items]
Approved rate increase (decrease), amount									$ (8.8)
BGSS/CIP Filing
Schedule of Regulatory Filings [Line Items]
Interim rate increase (decrease), amount								$ 10.9
Infrastructure Investment Program (IIP)
Schedule of Regulatory Filings [Line Items]
Number of project components | project_component						2
Investment						$ 507.0
Program term						5 years
RAC
Schedule of Regulatory Filings [Line Items]
Approved rate increase (decrease), amount							$ 1.4
NJCEP
Schedule of Regulatory Filings [Line Items]
Approved rate increase (decrease), amount							$ 1.9
NJ RISE and SAFE II
Schedule of Regulatory Filings [Line Items]
Requested rate increase (decrease), amount					8.7
Investment cost					$ 75.0
BPU
Schedule of Regulatory Filings [Line Items]
Requested rate increase (decrease), amount				$ 3.5
Requested return on return, percentage					7.87%
BGSS
Schedule of Regulatory Filings [Line Items]
Requested rate increase (decrease), amount				(6.8)
BGSS Balancing
Schedule of Regulatory Filings [Line Items]
Requested rate increase (decrease), amount				15.6
Conservation Incentive Program
Schedule of Regulatory Filings [Line Items]
Requested rate increase (decrease), amount				$ 12.8
June 2019 Annual USF Compliance Filing
Schedule of Regulatory Filings [Line Items]
Requested rate increase (decrease), amount			$ 1.2
Subsequent Event
Schedule of Regulatory Filings [Line Items]
Requested rate increase (decrease), amount		$ 129.8
Subsequent Event | NJ RISE and SAFE II
Schedule of Regulatory Filings [Line Items]
Revised rate increase (decrease), amount	$ 7.8