BUSINESS SEGMENT INFORMATION (Details 2) (Change in estimated total costs, USD $) In Millions	12 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Transportation systems contract
Financial data
Increase in revenue	$ 3.9	$ 4.5
Increase in operating income	3.9	4.5
Defense systems contract
Financial data
Increase in revenue	4.9
Increase in operating income	$ 4.9