Rationalization Of Operations (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014	Sep. 30, 2015
Restructuring Reserve [Roll Forward]
Beginning rationalization of operations liability			$ 22
Rationalization of operations, expense	44	21	53	34
Rationalization of operations, paid			26
Ending rationalization of operations liability	49		49
Severance and benefits [Member]
Restructuring Reserve [Roll Forward]
Beginning rationalization of operations liability			20
Rationalization of operations, expense			42
Rationalization of operations, paid			15
Ending rationalization of operations liability	47		47
Lease and other contract terminations [Member]
Restructuring Reserve [Roll Forward]
Beginning rationalization of operations liability			1
Rationalization of operations, expense			1
Rationalization of operations, paid			2
Ending rationalization of operations liability	0		0
Fixed assets write downs [Member]
Restructuring Reserve [Roll Forward]
Beginning rationalization of operations liability			0
Rationalization of operations, expense			2
Rationalization of operations, paid			2
Ending rationalization of operations liability	0		0
Vacant facility and other shutdown costs [Member]
Restructuring Reserve [Roll Forward]
Beginning rationalization of operations liability			0
Rationalization of operations, expense			2
Rationalization of operations, paid			1
Ending rationalization of operations liability	1		1
Start-up and moving costs [Member]
Restructuring Reserve [Roll Forward]
Beginning rationalization of operations liability			1
Rationalization of operations, expense			6
Rationalization of operations, paid			6
Ending rationalization of operations liability	1		1
Process Management [Member]
Restructuring Reserve [Roll Forward]
Rationalization of operations, expense	22	5	25	8
Industrial Automation [Member]
Restructuring Reserve [Roll Forward]
Rationalization of operations, expense	2	3	4	5
Network Power [Member]
Restructuring Reserve [Roll Forward]
Rationalization of operations, expense	13	6	14	10
Climate Technologies [Member]
Restructuring Reserve [Roll Forward]
Rationalization of operations, expense	4	7	6	10
Commercial & Residential Solutions [Member]
Restructuring Reserve [Roll Forward]
Rationalization of operations, expense	3	0	4	1
Scenario, Forecast [Member]
Restructuring Reserve [Roll Forward]
Expected fiscal year rationalization expense					$ 140