Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Additional Information (Detail)

v3.3.0.814
Summary of Significant Accounting Policies - Additional Information (Detail)
$ in Millions
 12 Months Ended 24 Months Ended
Aug. 31, 2015
USD ($)
Segment
Aug. 31, 2014
USD ($)
Aug. 31, 2013
USD ($)
Aug. 31, 2017
USD ($)
Significant Accounting Policies [Line Items]        
Number of reportable segments | Segment 3      
Portion of inventory determined using last-in, first-out ("LIFO") method 22.60% 20.60%    
Inventory LIFO reserve $ 5.6 $ 5.7    
Unearned Revenue 8.3 5.0    
Accounts Receivable, allowance for doubtful accounts 4.0 6.0    
Restructuring Charges 5.9      
Research and development costs 17.7 20.0 $ 21.0  
Foreign exchange transaction (gains)/losses $ 0.1 $ 4.2 $ 2.7  
Minimum | Buildings and improvements        
Significant Accounting Policies [Line Items]        
Property, plant and equipment useful life 10 years      
Minimum | Machinery and equipment        
Significant Accounting Policies [Line Items]        
Property, plant and equipment useful life 2 years      
Maximum | Buildings and improvements        
Significant Accounting Policies [Line Items]        
Property, plant and equipment useful life 40 years      
Maximum | Machinery and equipment        
Significant Accounting Policies [Line Items]        
Property, plant and equipment useful life 15 years      
Scenario, Forecast        
Significant Accounting Policies [Line Items]        
Restructuring charges in future periods       $ 25.0