Pension Plans (Accounting For The Pension Plans) (Details) - Pension Plan [Member]	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017
Defined Benefit Plan Disclosure [Line Items]
Weighted average assumptions used to determine benefit obligations at September 30 measurement date, Discount rate	0.90%	1.90%	1.80%
Weighted average assumptions used to determine benefit obligations at September 30 measurement date, Rate of increase in future compensation	2.80%	3.00%	2.80%
Weighted average assumptions used to determine net periodic pension cost for fiscal years ended September 30, Discount rate	1.90%	1.80%	1.30%
Weighted average assumptions used to determine net periodic pension costs for fiscals years ended September 30, Rate of increase of future compensation	3.00%	2.80%	2.80%
Weighted average assumptions used to determine net periodic pension cost for fiscal years ended September 30, Rate of return on plan assets	5.40%	5.40%	5.40%