RETIREMENT MEDICAL PLANS (Details Textuals) (USD $)	12 Months Ended						3 Months Ended		12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2014 Retiree Medical Plan [Member]	Sep. 30, 2014 Union Plan Amendments [Member]	Sep. 30, 2014 Prescription Drug Benefit [Member]	Sep. 30, 2014 Retiree Medical Plan [Member]		Sep. 30, 2014 Retiree Medical Plan [Member]		Sep. 30, 2013 Retiree Medical Plan [Member]		Sep. 30, 2012 Retiree Medical Plan [Member]	Sep. 26, 2014 Retiree Medical Plan [Member] Minimum [Member]	Sep. 26, 2014 Retiree Medical Plan [Member] Maximum [Member]
Liability for retroactive benefits							$ 2,000,000	[1]	$ 2,000,000	[1]	$ 2,000,000	[1]
Face amount of employee life insurance coverage per employee														3,750	15,000
Curtailment gain							16,000,000		16,000,000		5,000,000
Health care cost trend rate (weighted average)	7.40%								7.40%		7.00%		7.20%
Average remaining service period of active participants				8 years	3 years	8 years
Reduction in retiree medical expense from subsidy		(9,000,000)	(12,000,000)
Reduction in APBO from subsidy		35,000,000	25,000,000
Net actuarial loss estimated to be amortized from accumulated other comprehensive loss	22,000,000
The prior service benefit estimated to be amortized from accumulated other comprehensive loss to periodic benefits cost	1,000,000
Decrease in retiree medical expense							$ 15,000,000

[1] The company recorded a $2 million reserve for retiree medical liabilities at September 30, 2014 and 2013 as its best estimate for retroactive benefits related to the previously mentioned injunction.