REGULATION - REGULATORY FILINGS (Details) - Natural Gas Distribution $ in Millions	Mar. 29, 2019 USD ($)	Feb. 28, 2019 USD ($) project_component	Dec. 28, 2018 USD ($)	Dec. 18, 2018 USD ($)
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]
Requested customer refunds, amount			$ 10.9
Infrastructure Investment Program (IIP)
Schedule of Regulatory Filings [Line Items]
Program term		5 years
Number of project components | project_component		2
Investment		$ 507.0
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	8.7
Investment Cost	$ 75.0
BPU
Schedule of Regulatory Filings [Line Items]
Requested return on return, percentage	7.87%