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Employee Benefit Plans (Details) - Schedule of total weighted average asset allocations	May 31, 2016	May 31, 2015
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	29.80%	29.20%
Debt Securities [Member]
Defined Benefit Plan, Information about Plan Assets [Abstract]
Weighted average asset allocations	63.00%	64.60%
Real Estate [Member]
Defined Benefit Plan, Information about Plan Assets [Abstract]
Weighted average asset allocations	1.30%	1.30%
Other Securities [Member]
Defined Benefit Plan, Information about Plan Assets [Abstract]
Weighted average asset allocations	5.90%	4.90%

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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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