Property, Plant and Equipment Schedule of Property, Plant and Equipment (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2011
Property, Plant and Equipment [Abstract]
Buildings and improvements	$ 3,046	$ 2,716
Machinery and equipment	8,189	7,827
Construction in progress	1,441	1,722
Land	374	375
Total property, plant and equipment	13,050	12,640
Less accumulated depreciation	(6,465)	(6,200)
Property, plant and equipment-net	$ 6,585	$ 6,440	$ 5,616