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Contingencies and Litigation - Additional Information (Detail) - USD ($) $ in Millions | Aug. 31, 2016 | Aug. 31, 2015
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Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Outstanding letters of credit | $ 17.8 | $ 18.1
Discounted present value of future minimum lease payments | 16.0 |
Electrical |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Discounted present value of future minimum lease payments | $ 12.3 |

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- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
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