Other Financial Information (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Sep. 30, 2011
Other Financial Information [Line Items]
Finished products	$ 796	$ 742
Raw materials and work in process	1,521	1,358
Total Inventories	2,317	2,100
Property, plant and equipment, at cost	8,746	8,731
Less: Accumulated depreciation	5,331	5,294
Total Property, plant and equipment, net	3,415	3,437
Goodwill	8,723	8,771
Employee compensation	518	640
Customer advanced payments	438	385
Product warranty	192	211
Deferred income taxes	735	764
Pension plans	736	736
Postretirement plans, excluding current portion	357	361
Other	708	660
Total Other liabilities	2,536	2,521
Process Management [Member]
Other Financial Information [Line Items]
Goodwill	2,361	2,368
Industrial Automation [Member]
Other Financial Information [Line Items]
Goodwill	1,362	1,393
Network Power [Member]
Other Financial Information [Line Items]
Goodwill	3,980	3,990
Climate Technologies [Member]
Other Financial Information [Line Items]
Goodwill	478	483
Tools And Storage [Member]
Other Financial Information [Line Items]
Goodwill	$ 542	$ 537