COMMITMENTS AND CONTINGENT LIABILITIES - LEGAL PROCEEDINGS (Details) (USD $)			3 Months Ended						3 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Dec. 31, 2013 Minimum [Member]	Dec. 31, 2013 Maximum [Member]	Dec. 31, 2013 Environmental Remediation Costs Expended, Net of Recoveries [Member]	Sep. 30, 2013 Environmental Remediation Costs Expended, Net of Recoveries [Member]	Dec. 31, 2013 Environmental Remediation Costs Liability for Future Expenditures [Member]	Sep. 30, 2013 Environmental Remediation Costs Liability for Future Expenditures [Member]	Dec. 31, 2013 SBC [Member] July 2013 SBC Filing [Member]
Site Contingency [Line Items]
Reduction in RA factor									$ 18,700,000
Regulatory assets	391,009,000	402,202,000			41,762,000	46,968,000	183,600,000	183,600,000
Litigation settlement, gross			$ 159,800,000	$ 261,200,000