Income Taxes (Schedule Of Reconciliations Of The U.S. Federal Statutory Tax Rate) (Details)	3 Months Ended	9 Months Ended	12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Income Tax Disclosure [Abstract]
Federal statutory rate	35.00%	21.00%	21.00%	21.00%	24.50%
State and local taxes, net of federal tax benefit			0.60%	1.00%	1.20%
Non-U.S. rate differential			1.70%	1.80%	0.80%
Non-U.S. tax holidays			(1.10%)	(1.10%)	(0.80%)
Research and development tax credits			(1.80%)	(0.30%)	(0.20%)
U.S. manufacturing deduction			0.00%	0.00%	(1.10%)
Foreign derived intangible income			(1.20%)	(1.10%)	0.00%
Gain on divestiture			0.00%	0.00%	1.00%
Non-U.S. subsidiary restructuring			(4.40%)	(2.60%)	(2.00%)
Transition impact of Tax Act			0.00%	0.00%	(7.10%)
Other			0.00%	(0.10%)	0.30%
Effective income tax rate			14.80%	18.60%	16.60%