Quarterly report pursuant to Section 13 or 15(d)

Contingencies and Litigation - Additional Information (Details)

v3.7.0.1
Contingencies and Litigation - Additional Information (Details) - USD ($)
$ in Millions
6 Months Ended
Feb. 28, 2017
Aug. 31, 2016
Commitments and Contingencies Disclosure [Abstract]    
Outstanding letters of credit $ 16.6 $ 17.8
Document Period End Date Feb. 28, 2017  
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Discounted present value of future minimum lease payments $ 14.1  
Electrical [Member]    
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]    
Discounted present value of future minimum lease payments $ 11.3