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RETIREMENT AND POSTRETIREMENT BENEFIT PLANS (Schedule of Health Care-Cost Trend Rates) (Details) (Postretirement Healthcare Plan [Member])	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
Postretirement Healthcare Plan [Member]
Health care-cost trend rates
Year 1	6.75%	7.25%	7.75%
Year 2	6.25%	6.75%	7.25%
Year 3	5.75%	6.25%	6.75%
Year 4	5.25%	5.75%	6.25%
Year 5	5.00%	5.25%	5.75%
Year 6	5.00%	5.00%	5.25%
Year 7	5.00%	5.00%	5.00%
Year 8 and beyond	5.00%	5.00%	5.00%

The assumed health care cost trend rate for the next year used to measure the expected cost of benefits covered by the plan (gross eligible charges). This is based upon the annual rate of change in the cost of health care benefits currently provided by the postretirement benefit plan, due to factors other than changes in the composition of the plan population by age and dependency status.

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