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Rationalization Of Operations (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Sep. 30, 2015
Restructuring Reserve [Roll Forward]
Beginning rationalization of operations liability	$ 22us-gaap_RestructuringReserve
Rationalization of operations, expense	9us-gaap_RestructuringCharges	13us-gaap_RestructuringCharges
Rationalization of operations, paid	11us-gaap_PaymentsForRestructuring
Ending rationalization of operations liability	20us-gaap_RestructuringReserve
Process Management [Member]
Restructuring Reserve [Roll Forward]
Rationalization of operations, expense	3	3
Industrial Automation [Member]
Restructuring Reserve [Roll Forward]
Rationalization of operations, expense	2	2
Network Power [Member]
Restructuring Reserve [Roll Forward]
Rationalization of operations, expense	1	4
Climate Technologies [Member]
Restructuring Reserve [Roll Forward]
Rationalization of operations, expense	2	3
Commercial & Residential Solutions [Member]
Restructuring Reserve [Roll Forward]
Rationalization of operations, expense	1	1
Severance and benefits [Member]
Restructuring Reserve [Roll Forward]
Beginning rationalization of operations liability	20
Rationalization of operations, expense	5
Rationalization of operations, paid	6
Ending rationalization of operations liability	19
Lease and other contract terminations [Member]
Restructuring Reserve [Roll Forward]
Beginning rationalization of operations liability	1
Rationalization of operations, expense	0
Rationalization of operations, paid	1
Ending rationalization of operations liability	0
Vacant facility and other shutdown costs [Member]
Restructuring Reserve [Roll Forward]
Beginning rationalization of operations liability	0
Rationalization of operations, expense	1
Rationalization of operations, paid	0
Ending rationalization of operations liability	1
Start-up and moving costs [Member]
Restructuring Reserve [Roll Forward]
Beginning rationalization of operations liability	1
Rationalization of operations, expense	3
Rationalization of operations, paid	4
Ending rationalization of operations liability	0
Scenario, Forecast [Member]
Restructuring Reserve [Roll Forward]
Expected fiscal year rationalization expense			$ 100