SHAREOWNERS' EQUITY (Reclassifications from AOCI) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended								12 Months Ended
	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2014		Sep. 30, 2013	Sep. 30, 2012
Accumulated Other Comprehensive Income (Loss) [Line Items]
INCOME (LOSS) FROM CONTINUING OPERATIONS									$ (284)		$ 13	$ (80)
Provision for income taxes	0	(12)	(8)	(11)	(45)	(1)	(7)	(11)	(31)		(64)	(57)
Net income (loss)	(4)	(234)	(3)	(13)	(43)	39	4	20	(254)		20	(63)
Reclassification out of Accumulated Other Comprehensive Income [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net income (loss)									24
Reclassification out of Accumulated Other Comprehensive Income [Member] | Employee Benefit Related Adjustment [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Prior service costs									(7)	[1]
Actuarial losses									46	[1]
Recognized prior service costs due to curtailment									(15)	[1]
INCOME (LOSS) FROM CONTINUING OPERATIONS									24
Provision for income taxes									0
Net income (loss)									$ 24

[1] These accumulated other comprehensive income components are included in the computation of net periodic pension and retiree medical expense (see Note 19 and 20 for additional details).