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Employee Benefit and Retirement Plans (Schedule Of Allocation Of Plan Assets) (Details) | Apr. 30, 2019 | Apr. 30, 2018
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Defined Benefit Plan Disclosure [Line Items] |  |
Plan asset target allocation | 100.00% |
Plan asset actual allocation | 100.00% | 100.00%
Equity Funds [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Plan asset target allocation | 30.00% |
Plan asset actual allocation | 31.00% | 40.00%
Fixed Income Funds [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Plan asset target allocation | 70.00% |
Plan asset actual allocation | 69.00% | 60.00%

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- Definition Percentage of target investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=112275985&loc=d3e4179-114921 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(i) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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- Definition Percentage of actual investment allocation to total plan assets. Includes, but is not limited to, percentage on weighted-average basis if more than one plan. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(i) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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