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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES, DEFINED BENEFIT (Details) (USD $)	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
Defined Benefit Plan Disclosure [Line Items]
Number of noncontributory medical and life insurance plans	2
Pension Plans Excluding Pension Equalization Plan, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	$ 0	$ 20,000,000	$ 20,000,000
OPEB [Member]
Defined Benefit Plan Disclosure [Line Items]
Employer contributions	$ 4,970,000	$ 5,977,000	$ 5,800,000

X

- Definition

Defined Benefit Plan, Number of Insurance Plans

+ References

No definition available.

+ Details

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X

- Definition

The increase in the fair value of plan assets from contributions made by the employer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (b)(3)

-URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920

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