RATES AND REGULATORY ACTIONS (Details) - USD ($) $ in Millions		1 Months Ended
	Feb. 29, 2016	Jun. 30, 2016	Apr. 30, 2016	Jan. 31, 2016	Oct. 31, 2015
New Jersey Board of Public Utilities
Schedule of Capitalization [Line Items]
Requested revenue increase (decrease)		$ 0.6
New Jersey Board of Public Utilities | Transportation Initiation Clause
Schedule of Capitalization [Line Items]
Approved revenue increase (decrease)			$ 5.2
New Jersey Board of Public Utilities | Clean Energy Program
Schedule of Capitalization [Line Items]
Approved revenue increase (decrease)			(7.1)
New Jersey Board of Public Utilities | Tenants in Common
Schedule of Capitalization [Line Items]
Approved revenue increase (decrease)			(0.7)
New Jersey Board of Public Utilities | Storm Hardening and Reliability Program
Schedule of Capitalization [Line Items]
Requested revenue increase (decrease)			(4.4)
New Jersey Board of Public Utilities | Conservation Incentive Program
Schedule of Capitalization [Line Items]
Requested revenue increase (decrease)		(46.5)
Energy Efficiency Tracker
Schedule of Capitalization [Line Items]
Decrease in amount of regulatory costs approved	$ 7.9
Requested revenue increase (decrease)		0.8
Basic Gas Supply Service
Schedule of Capitalization [Line Items]
Credits to customers				$ 20.0
Approved rate reduction (as percent)					10.30%
Basic Gas Supply Service | New Jersey Board of Public Utilities
Schedule of Capitalization [Line Items]
Requested revenue increase (decrease)		$ 47.1
Accelerated Infrastructure Replacement Program
Schedule of Capitalization [Line Items]
Extension period of AIRP	7 years
Total amount of investment requested for approval	$ 500.0
Total amount of investment request for approval through the end of 2016	$ 76.0
Societal Benefits Clause
Schedule of Capitalization [Line Items]
Approved revenue increase (decrease)			$ (2.6)