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Derivative Financial Instruments (Details 3) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Jan. 31, 2020 | Jan. 31, 2019 | Jan. 31, 2020 | Jan. 31, 2019
Price Risk Derivatives [Abstract] |  |  |  |
Net gains (losses) on mark-to-market valuation of unallocated derivative positions | $ (7.0) | $ (25.6) | $ (5.6) | $ (54.2)
Less: Net gains (losses) on derivative positions reclassified to segment operating profit | (14.7) | (22.7) | (43.2) | (29.2)
Unallocated derivative gains (losses) | $ 7.7 | $ (2.9) | $ 37.6 | $ (25.0)

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- Definition The amount of gain (loss) from derivative positions reclassified from derivative gains (losses) to segment operating profit. + References No definition available. + Details
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- Definition Changes in the values of derivative positions that is recorded in unallocated derivative gains (losses). + References No definition available. + Details
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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/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4CC -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL109998890-113959 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5624171-113959 + Details
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