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Contingencies and Other Accrued Losses - Additional Information (Detail) (USD $) | 3 Months Ended |
--- | --- | ---
Aug. 31, 2013 | May 31, 2013
Schedule Of Commitments And Contingencies [Line Items] |  |
Accrued contingencies |  | $ 65,100,000
(Decrease) in contingent payment | (61,894,000) |
Expected payment to resolve issues arising out of investigation and other related costs | $ 3,200,000 |

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- Details
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- Definition Amount of loss contingency liability. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=25496072&loc=d3e14326-108349 + Details
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