Retirement Plans (Schedule Of Weighted-Average Assumptions Used In Valuations Of Pension Benefits) (Details)	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Assumption used to determine net pension expense service cost, Discount rate	3.40%	4.33%	3.95%
Assumption used to determine net pension expense interest cost, Discount rate	2.87%	3.98%	3.25%
Assumptions used to determine net pension expense, Expected return on plan assets	6.75%	7.00%	7.00%
Assumptions used to determine net pension expense, Rate of compensation increase	3.25%	3.25%	3.25%
Assumptions used to determine benefit obligations, Discount rate	2.81%	3.22%	4.26%
Assumptions used to determine benefit obligations, Rate of compensation increase	3.25%	3.25%	3.25%
Non-U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Assumption used to determine net pension expense service cost, Discount rate	1.90%	2.70%	2.60%
Assumption used to determine net pension expense interest cost, Discount rate	1.90%	2.70%	2.60%
Assumptions used to determine net pension expense, Expected return on plan assets	5.80%	6.10%	5.70%
Assumptions used to determine net pension expense, Rate of compensation increase	3.70%	3.50%	3.40%
Assumptions used to determine benefit obligations, Discount rate	1.90%	1.90%	2.70%
Assumptions used to determine benefit obligations, Rate of compensation increase	3.60%	3.70%	3.50%