Retirement And Postretirement Benefit Plans (Schedule Of Weighted Average Assumptions Used In Accounting For Domestic Pension Plans) (Details)	12 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2009
Retirement And Postretirement Benefit Plans
Discount rate for obligation	4.60%	5.10%	5.50%
Rate of compensation increase	3.50%	3.50%	4.00%
Discount rate for expense	5.10%	5.50%	7.50%
Expected rate of return on plan assets	7.50%	7.50%	7.50%
Rate of compensation increase	3.50%	4.00%	4.00%