Acquisitions and Divestitures (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended		3 Months Ended	12 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Mar. 31, 2012 Avtron Loadbank and Marine Controls Business [Member]	Sep. 30, 2011 Avtron Loadbank and Marine Controls Business [Member]	Sep. 30, 2011 Knaack [Member]
Acquisitions and Divestitures [Line Items]
Percent of Entity Acquired					100.00%
Total Consideration Paid To Acquire Businesses					$ 170
Business Acquisition, Revenue Reported by Acquired Entity for Last Annual Period						100
Net sales	$ 6,484	$ 6,288	$ 17,712	$ 17,677			$ 100