INVESTMENTS IN EQUITY INVESTEES, EQUITY METHOD INVESTMENTS (Details) shares in Thousands, $ in Thousands			3 Months Ended
		Sep. 29, 2015 USD ($) shares	Sep. 30, 2014 USD ($) Investor mi	Sep. 30, 2015 USD ($)
Schedule of Equity Method Investments [Line Items]
Investments in equity investees			$ 153,010	$ 132,002
PennEast [Member]
Schedule of Equity Method Investments [Line Items]
Number of investors | Investor			4
Construction plan, pipeline distance (in miles) | mi			118
Ownership interest, percent				20.00%
Investments in equity investees			$ 555	$ 6,353
Iroquois [Member]
Schedule of Equity Method Investments [Line Items]
Ownership interest, percent			5.53%	5.53%
Investments in equity investees		$ 21,500	$ 24,042	$ 0
Dominion [Member]
Schedule of Equity Method Investments [Line Items]
Ownership interest exchanged (in shares) | shares		1,840
Deferred gain		$ 24,600
Steckman Ridge [Member]
Schedule of Equity Method Investments [Line Items]
Ownership interest, percent				50.00%
Investments in equity investees	[1]		128,413	$ 125,649
Steckman Ridge [Member] | Equity Method Investee [Member]
Schedule of Equity Method Investments [Line Items]
Outstanding principal balance			$ 70,400	$ 70,400

[1] Includes loans with a total outstanding principal balance of $70.4 million for both fiscal 2015 and 2014, which accrue interest at a variable rate that resets quarterly and are due October 1, 2023.