Employee Benefit Plans (Schedule Of Assumptions Used) (Details)	12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2010
Pension Benefits [Member]
Discount rate - benefit obligations	3.77%	4.60%
Discount rate - net periodic benefit	4.60%	5.08%	5.59%
Expected long-term return on plan assets - net periodic benefit	6.50%	6.50%	6.50%
Other Postretirement Benefit Plans Defined Benefit [Member]
Discount rate - benefit obligations	3.77%	4.60%
Discount rate - net periodic benefit	4.60%	5.08%	5.59%