Restructuring Costs (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012		Sep. 30, 2012
Balance			$ 15	$ 19
Activity during the period:
Restructuring Charges	12	3	29	30
Charges to discontinued operations for Retained Entities				1	[1]
Asset impairments and other			(1)	(20)
Cash payments - continuing operations			(17)	(15)
Cash payments - discontinued operations				(3)
Other			(2)
Total restructuring reserves	24	12	24	12
Less: non-current restructuring reserves	(10)	5	(10)	5		(4)
Restructuring reserves - current	14	7	14	7		11
Employee Severance [Member]
Balance			15	19
Activity during the period:
Restructuring Charges			18	9
Charges to discontinued operations for Retained Entities				0	[1]
Asset impairments and other			0	(1)
Cash payments - continuing operations			(17)	(14)
Cash payments - discontinued operations				(2)
Other			(1)
Total restructuring reserves	15	11	15	11
Less: non-current restructuring reserves	(3)	5	(3)	5
Restructuring reserves - current	12	6	12	6
Asset Impairment [Member]
Balance			0	0
Activity during the period:
Restructuring Charges			1	19
Charges to discontinued operations for Retained Entities				0	[1]
Asset impairments and other			(1)	(19)
Cash payments - continuing operations			0	0
Cash payments - discontinued operations				0
Other			0
Total restructuring reserves	0	0	0	0
Less: non-current restructuring reserves	0	0	0	0
Restructuring reserves - current	0	0	0	0
Plant Shut Down and Other [Member]
Balance			0	0
Activity during the period:
Restructuring Charges			10	2
Charges to discontinued operations for Retained Entities				1	[1]
Asset impairments and other			0	0
Cash payments - continuing operations			0	(1)
Cash payments - discontinued operations				(1)
Other			(1)
Total restructuring reserves	9	1	9	1
Less: non-current restructuring reserves	(7)	0	(7)	0
Restructuring reserves - current	$ 2	$ 1	$ 2	$ 1

[1] Charges to discontinued operations are included in loss from discontinued operations in the consolidated statement of operations.