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Employee Benefit Plans (Details) - Schedule of targeted weighted average asset allocations - Pension Plans [Member] | 12 Months Ended
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May 31, 2017
U.S. [Member] |
Defined Benefit Plan, Assets, Target Allocations [Abstract] |
Targeted asset allocation | 100.00%
U.S. [Member] | Equity Securities [Member] |
Defined Benefit Plan, Assets, Target Allocations [Abstract] |
Targeted asset allocation | 15.00%
U.S. [Member] | Debt and cash equivalent [Member] |
Defined Benefit Plan, Assets, Target Allocations [Abstract] |
Targeted asset allocation | 85.00%
U.S. [Member] | Real estate and other [Member] |
Defined Benefit Plan, Assets, Target Allocations [Abstract] |
Targeted asset allocation | 0.00%
U.K. [Member] |
Defined Benefit Plan, Assets, Target Allocations [Abstract] |
Targeted asset allocation | 100.00%
U.K. [Member] | Equity Securities [Member] |
Defined Benefit Plan, Assets, Target Allocations [Abstract] |
Targeted asset allocation | 40.00%
U.K. [Member] | Debt and cash equivalent [Member] |
Defined Benefit Plan, Assets, Target Allocations [Abstract] |
Targeted asset allocation | 30.00%
U.K. [Member] | Real estate and other [Member] |
Defined Benefit Plan, Assets, Target Allocations [Abstract] |
Targeted asset allocation | 30.00%

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- Definition Target allocation of investments of this type to total plan assets presented on a weighted average basis. + 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)(i) -URI http://asc.fasb.org/extlink&oid=65897934&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)(i) -URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920 + Details
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