Rationalization Of Operations (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015	Sep. 30, 2016
Restructuring Reserve [Roll Forward]
Beginning rationalization of operations liability			$ 112
Rationalization of operations, expense	$ 15	$ 44	28	$ 53
Rationalization of operations, paid			85
Ending rationalization of operations liability	55		55
Severance and benefits [Member]
Restructuring Reserve [Roll Forward]
Beginning rationalization of operations liability			105
Rationalization of operations, expense			14
Rationalization of operations, paid			69
Ending rationalization of operations liability	50		50
Lease and other contract terminations [Member]
Restructuring Reserve [Roll Forward]
Beginning rationalization of operations liability			1
Rationalization of operations, expense			2
Rationalization of operations, paid			2
Ending rationalization of operations liability	1		1
Vacant facility and other shutdown costs [Member]
Restructuring Reserve [Roll Forward]
Beginning rationalization of operations liability			3
Rationalization of operations, expense			4
Rationalization of operations, paid			5
Ending rationalization of operations liability	2		2
Start-up and moving costs [Member]
Restructuring Reserve [Roll Forward]
Beginning rationalization of operations liability			3
Rationalization of operations, expense			8
Rationalization of operations, paid			9
Ending rationalization of operations liability	2		2
Process Management [Member]
Restructuring Reserve [Roll Forward]
Rationalization of operations, expense	9	22	13	25
Industrial Automation [Member]
Restructuring Reserve [Roll Forward]
Rationalization of operations, expense	1	2	4	4
Network Power [Member]
Restructuring Reserve [Roll Forward]
Rationalization of operations, expense	2	13	6	14
Climate Technologies [Member]
Restructuring Reserve [Roll Forward]
Rationalization of operations, expense	2	4	3	6
Commercial & Residential Solutions [Member]
Restructuring Reserve [Roll Forward]
Rationalization of operations, expense	$ 1	$ 3	$ 2	$ 4
Minimum [Member] | Scenario, Forecast [Member]
Restructuring Reserve [Roll Forward]
Expected fiscal year rationalization expense					$ 70
Maximum [Member] | Scenario, Forecast [Member]
Restructuring Reserve [Roll Forward]
Expected fiscal year rationalization expense					$ 80