Employee Benefit Plans (Schedule Of Assumptions Used) (Details)	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Pension Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Discount rate - net periodic benefit	4.15%	4.14%	4.72%
Expected long-term return on plan assets - net periodic benefit	6.50%	6.50%	6.50%
Rate of compensation increase - net periodic benefit
Other Benefits [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Discount rate - net periodic benefit	3.43%	3.40%	4.72%
Expected long-term return on plan assets - net periodic benefit
Rate of compensation increase - net periodic benefit