Restructuring Costs (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014	Sep. 30, 2014
Restructuring Reserve [Roll Forward]
Beginning balance			$ 11	$ 12
Charges to continuing operations	$ 9	$ 0	15	3
Cash payments – continuing operations			(10)	(6)
Other			(3)
Total restructuring reserves	13	9	11	12	$ 11
Less: non-current restructuring reserves	(2)	(3)			(2)
Restructuring reserves – current	11	6			9
Employee Termination Benefits
Restructuring Reserve [Roll Forward]
Beginning balance			11	12
Charges to continuing operations			15	3
Cash payments – continuing operations			(10)	(6)
Other			(3)
Total restructuring reserves	13	9	11	12	11
Less: non-current restructuring reserves	(2)	(3)
Restructuring reserves – current	11	6
Asset Impairment
Restructuring Reserve [Roll Forward]
Beginning balance			0	0
Charges to continuing operations			0	0
Cash payments – continuing operations			0	0
Other			0
Total restructuring reserves	0	0	0	0	0
Less: non-current restructuring reserves	0	0
Restructuring reserves – current	0	0
Plant Shutdown & Other
Restructuring Reserve [Roll Forward]
Beginning balance			0	0
Charges to continuing operations			0	0
Cash payments – continuing operations			0	0
Other			0
Total restructuring reserves	0	0	$ 0	$ 0	$ 0
Less: non-current restructuring reserves	0	0
Restructuring reserves – current	$ 0	$ 0