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Deferred Compensation And Retirement Plans (Weighted-Average Assumptions Used In Calculating The Benefit Obligations) (Detail)	Apr. 30, 2015	Apr. 30, 2014	Apr. 30, 2013
Deferred Compensation Plan
Defined Benefit Plan Disclosure [Line Items]
Rate of compensation increase	0.00%	0.00%	0.00%
Pension Plans, Defined Benefit
Defined Benefit Plan Disclosure [Line Items]
Rate of compensation increase	0.00%	0.00%	0.00%

X

- Definition

Expected rate of compensation increases (for pay-related plans).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 715



-SubTopic 20



-Section 50



-Paragraph 1



-Subparagraph (k)(2)



-URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920

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X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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