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Derivative Financial Instruments (Details 2) - USD ($) $ in Millions | 12 Months Ended
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Apr. 30, 2015 | Apr. 30, 2014
Gains and losses recognized in cost of products sold on derivatives not designated as qualified hedging instruments |  |
Total gains (losses) recognized in cost of products sold | $ (39.7) | $ 8.5
Commodity Contracts [Member] |  |
Gains and losses recognized in cost of products sold on derivatives not designated as qualified hedging instruments |  |
Total gains (losses) recognized in cost of products sold | (48.5) | 5.2
Foreign currency exchange contracts [Member] |  |
Gains and losses recognized in cost of products sold on derivatives not designated as qualified hedging instruments |  |
Total gains (losses) recognized in cost of products sold | $ 8.8 | $ 3.3

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- Definition Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=35706170&loc=SL5624171-113959 + Details
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- References No definition available. + Details
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