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Reportable Segments (Details Textual) $ in Millions | 12 Months Ended
--- | ---
Apr. 30, 2015 USD ($) Segment Industry | Apr. 30, 2014 USD ($) | Apr. 30, 2013
Concentration Risk [Line Items] |  |  |
Trade receivables, less allowance for doubtful accounts | $ 430.1 | $ 309.4 |
Reportable Segments (Textual) [Abstract] |  |  |
Number of reportable segments | Segment | 4 |  |
Number of industries in which Company operates | Industry | 1 |  |
Major Customer [Member] | Sales [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Percentage of concentration risk | 10.00% | 10.00% | 10.00%
Wal-Mart Major Customer [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Trade receivables, less allowance for doubtful accounts | $ 122.6 | $ 76.6 |
Wal-Mart Major Customer [Member] | Sales [Member] |  |  |
Concentration Risk [Line Items] |  |  |
Percentage of concentration risk | 28.00% | 27.00% | 26.00%

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- Definition Amount due from customers or clients, within one year of the balance sheet date (or the normal operating cycle, whichever is longer), for goods or services (including trade receivables) that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.3-4) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 3 -Subparagraph a(1) -Article 5 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 4 -Article 5 + Details
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