SHAREOWNERS' EQUITY (Reclassifications from AOCI) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Accumulated Other Comprehensive Income (Loss) [Line Items]
INCOME (LOSS) FROM CONTINUING OPERATIONS									$ (66)	$ (284)	$ 13
Provision for income taxes	$ 18	$ (6)	$ (6)	$ (7)	$ 0	$ (12)	$ (8)	$ (11)	(1)	(31)	(64)
Net income (loss)	$ 22	$ (14)	$ (43)	$ (30)	$ (4)	$ (234)	$ (3)	$ (13)	(65)	(254)	$ 20
Amount Reclassified from Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income (Loss) [Line Items]
Net income (loss)									103	24
Amount Reclassified from Accumulated Other Comprehensive Loss | Employee Benefit Related Adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Prior service costs									(1)	(7)
Actuarial losses									47	46
Recognized prior service costs due to curtailment									56	(15)
INCOME (LOSS) FROM CONTINUING OPERATIONS									102	24
Provision for income taxes									0	0
Net income (loss)									102	$ 24
Amount Reclassified from Accumulated Other Comprehensive Loss | Accumulated Defined Benefit Plan Adjustment, Other
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other reclassification adjustment									1
INCOME (LOSS) FROM CONTINUING OPERATIONS									1
Provision for income taxes									0
Net income (loss)									$ 1