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.

No definition available.

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- Definition

Assets, usually stocks, bonds, and other investments, that have been segregated and restricted (usually in a trust) to provide benefits, at their fair value as of the measurement date. Plan assets include amounts contributed by the employer (and by employees for a contributory plan) and amounts earned from investing the contributions, less benefits paid. If a plan has liabilities other than for benefits, those non-benefit obligations may be considered as reductions of plan assets.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 30

-Section 35

-Paragraph 50

-URI http://asc.fasb.org/extlink&oid=29635418&loc=d3e12355-114930

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (b)

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

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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=35743120&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=35743120&loc=d3e1928-114920

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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=35743120&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=35743120&loc=d3e1928-114920

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Weighted-Average Actual Target Allocation of Plan Assets (Detail) - USD ($) $ in Thousands	12 Months Ended
	May. 31, 2015	May. 31, 2014	May. 31, 2013
Pension Benefits, U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	100.00%
Actual Asset Allocation	$ 327,427	$ 282,113	$ 241,960
Pension Benefits, U.S. Plans \| Equity securities
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	55.00%
Actual Asset Allocation	$ 223,200	193,800
Pension Benefits, U.S. Plans \| Fixed maturity
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	25.00%
Actual Asset Allocation	$ 95,900	81,500
Pension Benefits, U.S. Plans \| Cash
Defined Benefit Plan Disclosure [Line Items]
Actual Asset Allocation	$ 8,000	5,900
Pension Benefits, U.S. Plans \| Real Estate
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	20.00%
Actual Asset Allocation	$ 300	900
Pension Benefits, Non-U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	100.00%
Actual Asset Allocation	$ 176,437	177,079	$ 155,056
Pension Benefits, Non-U.S. Plans \| Equity securities
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	42.00%
Actual Asset Allocation	$ 75,700	84,000
Pension Benefits, Non-U.S. Plans \| Fixed maturity
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	51.00%
Actual Asset Allocation	$ 68,900	63,900
Pension Benefits, Non-U.S. Plans \| Cash
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	1.00%
Actual Asset Allocation	$ 400	500
Pension Benefits, Non-U.S. Plans \| Real Estate
Defined Benefit Plan Disclosure [Line Items]
Target Allocation	6.00%
Actual Asset Allocation	$ 31,400	$ 28,700