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REGULATION - REGULATORY FILINGS (Details) - USD ($) $ in Millions |  | 1 Months Ended | 3 Months Ended | 9 Months Ended | 18 Months Ended
--- | --- | --- | --- | --- | ---
Oct. 01, 2014 | Jun. 30, 2015 | Dec. 31, 2015 | Jun. 30, 2015 | May. 31, 2015
BGSS [Member] |  |  |  |  |
Schedule of Regulatory [Line Items] |  |  |  |  |
Public Utilities, interim rate increase (decrease), percentage | (5.00%) |  |  |  |
BGSS [Member] | Subsequent Event [Member] |  |  |  |  |
Schedule of Regulatory [Line Items] |  |  |  |  |
Increase (decrease) in requested rate, percentage |  |  | (14.30%) |  |
Customer refunds and bill credits |  |  | $ 63.7 |  |
CIP [Member] |  |  |  |  |
Schedule of Regulatory [Line Items] |  |  |  |  |
Public Utilities, interim rate increase (decrease), percentage | (4.30%) |  |  |  |
Increase (decrease) in requested rate, percentage |  |  |  | 0.08% |
SAVEGREEN [Member] | June 2014 SAVEGREEN Filing [Member] |  |  |  |  |
Schedule of Regulatory [Line Items] |  |  |  |  |
Recovery amount approved by the Board of Public Utilities |  |  |  | $ 75.2 |
Public Utilities, weighted average cost of capital |  |  |  | 6.69% |
SBC [Member] | September 2014 SBC Filing [Member] |  |  |  |  |
Schedule of Regulatory [Line Items] |  |  |  |  |
Increase (decrease) in approved rate, percentage |  |  |  | (3.30%) |
RA [Member] | July 2013 SBC Filing [Member] |  |  |  |  |
Schedule of Regulatory [Line Items] |  |  |  |  |
Reduction in the RA factor |  |  |  |  | $ 18.7
RA [Member] | September 2014 SBC Filing [Member] |  |  |  |  |
Schedule of Regulatory [Line Items] |  |  |  |  |
Reduction in the RA factor |  | $ 8.5 |  |  |
NJCEP [Member] | July 2013 SBC Filing [Member] |  |  |  |  |
Schedule of Regulatory [Line Items] |  |  |  |  |
Reduction in the RA factor |  |  |  |  | $ 26.8
NJCEP [Member] | September 2014 SBC Filing [Member] |  |  |  |  |
Schedule of Regulatory [Line Items] |  |  |  |  |
Reduction in the RA factor |  | $ 16.3 |  |  |
NJ RISE Program [Member] |  |  |  |  |
Schedule of Regulatory [Line Items] |  |  |  |  |
Increase (decrease) in requested rate, percentage |  |  |  | 0.03% |
USF [Member] |  |  |  |  |
Schedule of Regulatory [Line Items] |  |  |  |  |
Increase (decrease) in requested rate, percentage |  |  |  | (0.60%) |

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