Discontinued Operations (Components Income (Loss) From Discontinued Operations) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2012	Mar. 31, 2011
Discontinued Operations [Abstract]
Net sales and other operating revenues	$ 8	$ 52	$ 46	$ 111
Income from operations before income taxes	3	24	21	48
Provision for income taxes on operations		(8)	(7)	(16)
Income from operations, net of tax	3	16	14	32
Gain on sale of discontinued operations	294		294
Provision for income taxes on gain on sale	(108)		(108)
Gain on sale of discontinued operations, net of tax	186		186
Income from discontinued operations, net of tax	$ 189	$ 16	$ 200	$ 32