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Income Taxes - Additional Information (Detail) - USD ($) | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Nov. 30, 2016 | Aug. 31, 2016 | Nov. 30, 2015 | Nov. 30, 2016 | Nov. 30, 2015 | May 31, 2016
Income Tax Disclosure [Abstract] |  |  |  |  |  |
Effective income tax expense (benefit) rate | (34.30%) |  | 30.00% | (3.70%) | 29.70% |
Federal statutory rate | 35.00% |  | 35.00% | 35.00% | 35.00% |
Discrete tax benefit for excess tax benefits related to equity compensation | $ 900,000 | $ 10,400,000 |  |  |  |
Undistributed foreign earnings | 368,800,000 |  |  | $ 368,800,000 |  | $ 377,300,000
Deferred income tax liability | 95,300,000 |  |  | 95,300,000 |  | $ 98,500,000
Provision for deferred income taxes | $ 0 |  |  | $ 0 |  |

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- Definition Amount of deferred tax liability attributable to taxable temporary differences from undistributed earnings of subsidiaries and other recognized entities not within the country of domicile of the entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 25 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=68052875&loc=d3e28680-109314 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32621-109319 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32632-109319 + Details
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- Definition Amount of deferred tax liability not recognized because of the exceptions to comprehensive recognition of deferred taxes related to undistributed earnings of foreign subsidiaries. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6424122&loc=d3e41874-109331 + Details
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