Shareowners' Equity (Reclassifications from AOCI) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Accumulated Other Comprehensive Income (Loss) [Line Items]
INCOME FROM CONTINUING OPERATIONS	$ 16	$ 237	$ 88	$ 254
Provision for income taxes	(6)	(12)	(19)	(31)
NET INCOME	14	234	87	250
Amount Reclassified from Accumulated Other Comprehensive Income
Accumulated Other Comprehensive Income (Loss) [Line Items]
NET INCOME		11	36	29
Amount Reclassified from Accumulated Other Comprehensive Income | Employee Benefit Related Adjustments
Accumulated Other Comprehensive Income (Loss) [Line Items]
Prior service costs	(1)	(2)	(1)	(6)
Actuarial losses	12	12	36	35
INCOME FROM CONTINUING OPERATIONS	11	10	35	29
Provision for income taxes	0	1	0	0
NET INCOME	$ 11	$ 11	35	$ 29
Amount Reclassified from Accumulated Other Comprehensive Income | Foreign Currency Translation
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other reclassification adjustment			1
INCOME FROM CONTINUING OPERATIONS			1
Provision for income taxes			0
NET INCOME			$ 1