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Employee Benefit Plans (Details) - Schedule of total weighted average asset allocations	May. 31, 2015	May. 31, 2014
Defined Benefit Plan, Information about Plan Assets [Abstract]
Weighted average asset allocations	100.00%	100.00%
Equity Securities [Member]
Defined Benefit Plan, Information about Plan Assets [Abstract]
Weighted average asset allocations	29.20%	33.00%
Debt Securities [Member]
Defined Benefit Plan, Information about Plan Assets [Abstract]
Weighted average asset allocations	64.60%	58.80%
Real Estate [Member]
Defined Benefit Plan, Information about Plan Assets [Abstract]
Weighted average asset allocations	1.30%	1.10%
Other Securities [Member]
Defined Benefit Plan, Information about Plan Assets [Abstract]
Weighted average asset allocations	4.90%	7.10%

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- Definition

Percentage of fair value of investments (categorized by debt securities, equity securities, real estate and other plan assets) to the fair value of plan assets held.

+ References

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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 715



-SubTopic 20



-Section 50



-Paragraph 5



-Subparagraph (c)



-URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e2446-114920



Reference 2: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 715



-SubTopic 20



-Section 50



-Paragraph 1



-Subparagraph (d)(1)



-URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920

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