SHAREOWNERS' EQUITY (Accumulated Other Comprehensive Loss (AOCL)) (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Accumulated Other Comprehensive Income (Loss), Net Of Tax [Roll Forward]
Beginning balance	$ (749)	$ (734)
Other comprehensive income (loss) before reclassification	(120)	(39)
Amounts reclassified from accumulated other comprehensive loss - net of tax	103	24
Net current-period other comprehensive income (loss)	(17)	(15)
Ending balance	(766)	(749)
Foreign Currency Translation
Accumulated Other Comprehensive Income (Loss), Net Of Tax [Roll Forward]
Beginning balance	41	61
Other comprehensive income (loss) before reclassification	(96)	(20)
Amounts reclassified from accumulated other comprehensive loss - net of tax	1	0
Net current-period other comprehensive income (loss)	(95)	(20)
Ending balance	(54)	41
Employee Benefit Related Adjustments
Accumulated Other Comprehensive Income (Loss), Net Of Tax [Roll Forward]
Beginning balance	(789)	(792)
Other comprehensive income (loss) before reclassification	(18)	(21)
Amounts reclassified from accumulated other comprehensive loss - net of tax	102	24
Net current-period other comprehensive income (loss)	84	3
Ending balance	(705)	(789)
Unrealized Loss, net of tax
Accumulated Other Comprehensive Income (Loss), Net Of Tax [Roll Forward]
Beginning balance	(1)	(3)
Other comprehensive income (loss) before reclassification	(6)	2
Amounts reclassified from accumulated other comprehensive loss - net of tax	0	0
Net current-period other comprehensive income (loss)	(6)	2
Ending balance	$ (7)	$ (1)