Property, Plant And Equipment (Components Of Property, Plant And Equipment) (Details) (USD $) In Millions	12 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2009
Property, Plant And Equipment
Land and land improvements	$ 73	$ 69
Buildings	479	475
Machinery and equipment	2,076	2,011
Other	162	221
Construction in progress	177	102
Total property, plant and equipment	2,967	2,878
Less: accumulated depreciation	(1,931)	(1,941)
Net property, plant and equipment	1,036	937
Depreciation expense	$ 138	$ 137	$ 164