Rationalization Of Operations (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended			12 Months Ended		3 Months Ended												3 Months Ended		3 Months Ended		3 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Sep. 30, 2012	Sep. 30, 2013 Minimum [Member]	Sep. 30, 2013 Maximum [Member]	Dec. 31, 2012 Process Management [Member]	Dec. 31, 2011 Process Management [Member]	Dec. 31, 2012 Industrial Automation [Member]	Dec. 31, 2011 Industrial Automation [Member]	Dec. 31, 2012 Network Power [Member]	Dec. 31, 2011 Network Power [Member]	Dec. 31, 2012 Climate Technologies [Member]	Dec. 31, 2011 Climate Technologies [Member]	Dec. 31, 2012 Commercial & Residential Solutions [Member]	Dec. 31, 2011 Commercial & Residential Solutions [Member]	Dec. 31, 2012 Severance and benefits [Member]	Sep. 30, 2012 Severance and benefits [Member]	Dec. 31, 2012 Lease and other contract terminations [Member]	Sep. 30, 2012 Lease and other contract terminations [Member]	Dec. 31, 2012 Vacant facility and other shutdown costs [Member]	Sep. 30, 2012 Vacant facility and other shutdown costs [Member]	Dec. 31, 2012 Start-up and moving costs [Member]	Sep. 30, 2012 Start-up and moving costs [Member]
Rationalization Of Operations [Line Items]
Rationalization of operations, liability	$ 30		$ 32													$ 22	$ 23	$ 4	$ 5	$ 3	$ 3	$ 1	$ 1
Rationalization of operations, expense	16	23				3	5	5	4	4	10	1	2	3	2	7		0		2		7
Rationalization of operations, paid/utilized during the period	18															8		1		2		7
Expected fiscal year rationalization expense				$ 70	$ 80