REGULATION - REGULATORY FILINGS (Details) (USD $)	1 Months Ended			6 Months Ended
	Apr. 23, 2014 Subsequent Event [Member]	Apr. 23, 2014 Subsequent Event [Member] Revolving Credit Facility [Member]	Apr. 23, 2014 Subsequent Event [Member] Medium-term Notes [Member]	Mar. 31, 2014 CIP [Member]	Mar. 31, 2014 BGSS [Member]	Mar. 31, 2014 SBC [Member]	Mar. 31, 2014 NJCEP [Member]	Mar. 31, 2014 June 2013 USF Filing [Member] USF [Member]	Mar. 31, 2014 July 2013 SBC Filing [Member] SBC [Member]
Schedule of Regulatory [Line Items]
Percent of increase (decrease) for the average residential heating customer				(1.00%)	(6.00%)	(0.20%)	1.90%	(0.50%)
Annual recovery amount approved by the Board of Public Utilities									$ 18,700,000
Debt term	3 years
Maximum issuance amount			$ 300,000,000
Maturity period			30 years
Renewal period		5 years