Derivatives (Schedule Of Commodity Swap Contracts Outstanding) (Details) - Brass [Member] - Cash Flow Hedging [Member] $ in Millions	9 Months Ended	12 Months Ended
	Jun. 30, 2019 USD ($) T	Sep. 30, 2018 USD ($) T
Derivative [Line Items]
Notional Amount | T	1.0	1.0
Contract Value | $	$ 5.1	$ 5.6