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Contingencies and Other Accrued Losses - Additional Information (Detail) (USD $) | 3 Months Ended | 6 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Nov. 30, 2012 | Nov. 30, 2012 | May 31, 2012 | Aug. 31, 2012
Schedule Of Commitments And Contingencies [Line Items] |  |  |  |  |  |
Increase in long-term accrued product liability reserves |  |  | $ 27,000,000 |  | $ 25,800,000 |
Accrued contingencies | 16,900,000 |  | 16,900,000 |  |  | 11,400,000
Estimated loss contingency | $ 16,926,000 | [1] | $ 28,344,000 | [1] |  |
[1] | Restated

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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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- Definition Amount of increase (decrease) in 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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- Definition The amount of loss pertaining to the specified contingency that was charged against earnings in the period, including the effects of revisions in previously reported estimates. + 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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