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DEBT, SCHEDULE OF LONG TERM DEBT (Details) (NJNG [Member], USD $) In Millions, unless otherwise specified	6 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
NJNG [Member]
Debt Instrument [Line Items]
Sale Leaseback Transaction, Gross Proceeds	$ 6.5	$ 5.9

- Definition

The gross proceeds received from the asset(s) sold in connection with the transaction involving the sale of property to another party and the lease back to the seller.

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