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Derivatives (Schedule Of Commodity Swap Contracts Outstanding) (Details) - Brass [Member] - Cash Flow Hedging [Member] $ in Millions | 9 Months Ended | 12 Months Ended
--- | --- | ---
Jun. 30, 2018 USD ($) T | Sep. 30, 2017 USD ($) T
Derivative [Line Items] |  |
Notional Amount | T | 1.0 | 1.3
Contract Value | $ | $ 5.4 | $ 6.6

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Nominal mass used to calculate payments on a derivative instrument. + References No definition available. + Details
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- Details
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- Details
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