SHAREOWNERS' EQUITY (Accumulated Other Comprehensive Loss (AOCL)) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
Accumulated Other Comprehensive Income (Loss), Net Of Tax [Roll Forward]
Beginning balance	$ (734)
Other comprehensive income (loss) before reclassification	(39)
Amounts reclassified from accumulated other comprehensive loss - net of tax	24
Net current-period other comprehensive income (loss)	(15)	181	(87)
Ending balance	(749)	(734)
Foreign Currency Translation [Member]
Accumulated Other Comprehensive Income (Loss), Net Of Tax [Roll Forward]
Beginning balance	61
Other comprehensive income (loss) before reclassification	(20)
Amounts reclassified from accumulated other comprehensive loss - net of tax	0
Net current-period other comprehensive income (loss)	(20)
Ending balance	41
Employee Benefit Related Adjustment [Member]
Accumulated Other Comprehensive Income (Loss), Net Of Tax [Roll Forward]
Beginning balance	(792)
Other comprehensive income (loss) before reclassification	(21)
Amounts reclassified from accumulated other comprehensive loss - net of tax	24
Net current-period other comprehensive income (loss)	3
Ending balance	(789)
Unrealized Loss, net of tax [Member]
Accumulated Other Comprehensive Income (Loss), Net Of Tax [Roll Forward]
Beginning balance	(3)
Other comprehensive income (loss) before reclassification	2
Amounts reclassified from accumulated other comprehensive loss - net of tax	0
Net current-period other comprehensive income (loss)	2
Ending balance	$ (1)