Annual report pursuant to Section 13 and 15(d)

Contingencies and Litigation - Additional Information (Detail)

v3.3.0.814
Contingencies and Litigation - Additional Information (Detail) - USD ($)
$ in Millions
12 Months Ended
Aug. 31, 2015
Aug. 31, 2014
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Outstanding letters of credit $ 18.1 $ 14.0
Litigation Settlement, Expense 4.3  
Discounted present value of future minimum lease payments 17.9  
Electrical    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Discounted present value of future minimum lease payments $ 13.2