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Pension Plans - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Nov. 30, 2015 | Nov. 30, 2014 | Nov. 30, 2015 | Nov. 30, 2014 | May. 31, 2015
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |  |
Service cost | $ 9,600 |  | $ 19,200 |  |
Interest cost | 6,100 |  | 12,200 |  |
Reduction of service cost | (200) |  | (400) |  |
Reduction of interest cost | (1,400) |  | (2,800) |  |
Increase in income from continuing operations | 1,600 |  | 3,200 |  |
Increase in net income | $ 1,100 |  | $ 2,200 |  |
Increase in basic and diluted earnings per share | $ 0.01 |  | $ 0.02 |  |
Pension Benefits, U.S. Plans |  |  |  |  |
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |  |
Expected reduction to net periodic benefit expense |  |  | $ (5,400) |  |
Service cost | $ 8,202 | $ 7,564 | 16,404 | $ 15,128 |
Interest cost | 4,499 | 5,002 | 8,998 | 10,004 |
Contribution to retirement plans in current fiscal year |  |  | 35,800 |  | $ 32,000
Contribution to retirement plans in the current remaining fiscal year |  |  | 3,800 |  |
Pension Benefits, Non-U.S. Plans |  |  |  |  |
Defined Benefit Plans And Other Postretirement Benefit Plans Table Text Block [Line Items] |  |  |  |  |
Expected reduction to net periodic benefit expense |  |  | (1,000) |  |
Service cost | 1,067 | 1,231 | 2,134 | 2,462 |
Interest cost | $ 1,323 | $ 1,891 | $ 2,646 | $ 3,782 |
Contribution to retirement plans in current fiscal year |  |  |  |  | $ 5,700

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- Definition Defined benefit plan change in benefit obligation interest cost. + References No definition available. + Details
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- Definition Defined benefit plan change in benefit obligation service cost. + References No definition available. + Details
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- Definition Defined benefit plan change in income from continuing operations. + References No definition available. + Details
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- Definition Defined benefit plan change in net income. + References No definition available. + Details
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- Definition Defined Benefit Plan, Increase (Decrease) in Expected Net Periodic Benefit Cost + References No definition available. + Details
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- Definition Amount of the employer's best estimate of contributions expected to be paid to the plan in the current fiscal period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e2709-114920 + Details
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- Definition The increase in a defined benefit pension plan's projected benefit obligation or a defined benefit postretirement plan's accumulated postretirement benefit obligation due to the passage of time. + 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 (h)(2) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 + Details
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- Definition The actuarial present value of benefits attributed by the pension benefit formula to services rendered by employees during the period. The portion of the expected postretirement benefit obligation attributed to employee service during the period. The service cost component is a portion of the benefit obligation and is unaffected by the funded status of the plan. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Service Cost (Component of Net Periodic Pension Cost) -URI http://asc.fasb.org/extlink&oid=6525008 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h)(1) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 + Details
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- Definition Amount of employer's best estimate of contributions expected to be paid to the plan in the current remaining fiscal period. + References No definition available. + Details
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