Goodwill And Other Intangibles (Schedule Of Change In Carry Amount Of Goodwill By Business Segment) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
Goodwill [Roll Forward]
Goodwill, beginning balance	$ 8,771	$ 8,656
Acquisitions	94	125
Divestitures	(102)	(15)
Impairment	(592)	(19)	0
Foreign currency translation and other	(145)	24
Goodwill, ending balance	8,026	8,771	8,656
Process Management [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	2,368	2,274
Acquisitions	5	110
Divestitures
Impairment
Foreign currency translation and other	6	(16)
Goodwill, ending balance	2,379	2,368
Industrial Automation [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	1,393	1,379
Acquisitions
Divestitures		(1)
Impairment		(19)
Foreign currency translation and other	(55)	34
Goodwill, ending balance	1,338	1,393
Network Power [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	3,990	3,997
Acquisitions	62
Divestitures		(8)
Impairment	(592)
Foreign currency translation and other	(93)	1
Goodwill, ending balance	3,367	3,990
Climate Technologies [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	483	464
Acquisitions	27	15
Divestitures
Impairment
Foreign currency translation and other	(9)	4
Goodwill, ending balance	501	483
Commercial & Residential Solutions [Member]
Goodwill [Roll Forward]
Goodwill, beginning balance	537	542
Acquisitions
Divestitures	(102)	(6)
Impairment
Foreign currency translation and other	6	1
Goodwill, ending balance	$ 441	$ 537

Carrying amount as of the balance sheet date, which is the cumulative amount paid and (if applicable) the fair value of any noncontrolling interest in the acquiree, adjusted for any amortization recognized prior to the adoption of any changes in generally accepted accounting principles (as applicable) and for any impairment charges, in excess of the fair value of net assets acquired in one or more business combination transactions.

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-Publisher FASB

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+ Details

- Definition

The aggregate amount of goodwill acquired in the period and allocated to the reportable segment. The value is stated at fair value based on the purchase price allocation.

+ References+ Details

- Definition

Loss recognized during the period that results from the write-down of goodwill after comparing the implied fair value of reporting unit goodwill with the carrying amount of that goodwill. Goodwill is assessed at least annually for impairment.

+ References

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+ Details

- Definition

The increase (decrease) in the recorded value of goodwill for foreign currency translation adjustments and purchase accounting adjustments needed to revise the carrying amount of goodwill to fair value.

+ References

+ Details

- Definition

Write-off of the carrying amount of goodwill associated with all or a portion of a reporting unit that is sold in the period.

+ References+ Details