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Derivative Instruments and Hedging Activities (Outstanding Forward Foreign Exchange Contracts) (Details) - Foreign Exchange Forward € in Millions, £ in Millions, HUF in Millions, CAD in Millions, $ in Millions | Sep. 30, 2017 USD ($) | Sep. 30, 2017 HUF | Sep. 30, 2017 GBP (£) | Sep. 30, 2017 CAD | Sep. 30, 2017 EUR (€)
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British Pounds Sterling |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Foreign Currency Amount | £ |  |  | £ 0.1 |  |
US Dollar Amount | $ 0.1 |  |  |  |
Weighted average exchange rate per $1 USD | 0.75 | 0.75 | 0.75 | 0.75 | 0.75
Hungary, Forint |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Foreign Currency Amount | HUF |  | HUF 2,851.5 |  |  |
US Dollar Amount | $ 10.4 |  |  |  |
Weighted average exchange rate per $1 USD | 274.39 | 274.39 | 274.39 | 274.39 | 274.39
Euro Member Countries, Euro |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Foreign Currency Amount | € |  |  |  |  | € 2.0
US Dollar Amount | $ 2.3 |  |  |  |
Weighted average exchange rate per $1 USD | 0.87 | 0.87 | 0.87 | 0.87 | 0.87
Canada, Dollars |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Foreign Currency Amount | CAD |  |  |  | CAD 17.2 |
US Dollar Amount | $ 13.6 |  |  |  |
Weighted average exchange rate per $1 USD | 1.26 | 1.26 | 1.26 | 1.26 | 1.26

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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 The amount of foreign currency that the entity has contractually agreed, or for which it has the option, to buy or sell with respect to the contract being described. + 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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