Other Financial Information (Details) (USD $)	Jun. 30, 2012	Sep. 30, 2011
Other Financial Information [Line Items]
Finished products	$ 845,000,000	$ 742,000,000
Raw materials and work in process	1,522,000,000	1,358,000,000
Total Inventories	2,367,000,000	2,100,000,000
Property, plant and equipment, at cost	8,821,000,000	8,731,000,000
Less: Accumulated depreciation	5,403,000,000	5,294,000,000
Total Property, plant and equipment, net	3,418,000,000	3,437,000,000
Goodwill	8,739,000,000	8,771,000,000
Market Value	34,000,000,000
Stockholders' Equity Attributable to Parent	10,519,000,000	10,399,000,000
Goodwill for certain business units where fair value does not exceed the carrying value by significant amounts.	1,000,000,000
Employee compensation	609,000,000	640,000,000
Customer advanced payments	387,000,000	385,000,000
Product warranty	197,000,000	211,000,000
Deferred income taxes	714,000,000	764,000,000
Pension plans	688,000,000	736,000,000
Postretirement plans, excluding current portion	348,000,000	361,000,000
Other	726,000,000	660,000,000
Total Other liabilities	2,476,000,000	2,521,000,000
Process Management [Member]
Other Financial Information [Line Items]
Goodwill	2,356,000,000	2,368,000,000
Industrial Automation [Member]
Other Financial Information [Line Items]
Goodwill	1,332,000,000	1,393,000,000
Network Power [Member]
Other Financial Information [Line Items]
Goodwill	4,017,000,000	3,990,000,000
Climate Technologies [Member]
Other Financial Information [Line Items]
Goodwill	503,000,000	483,000,000
Commercial & Residential Solutions [Member]
Other Financial Information [Line Items]
Goodwill	$ 531,000,000	$ 537,000,000