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Concentration of Risk and Segment Data - Additional Information (Detail) (USD $)
In Billions, unless otherwise specified
12 Months Ended
Aug. 31, 2014
Aug. 31, 2013
Aug. 31, 2012
Segment Reporting Information [Line Items]      
Top customers that comprise revenue 5    
Percentage of revenue accounted by major customers 45.00%    
Number of customers accounted for 90% of its net revenue 71    
Percentage of revenue accounted for by customers 90.00%    
Number of operating segments 3    
Number of operating countries 24    
Net Revenue
     
Segment Reporting Information [Line Items]      
Sales concentration floor percentage 10.00%    
Foreign
     
Segment Reporting Information [Line Items]      
Total foreign revenue $ 13.3 $ 15.0 $ 13.9
Total long-lived assets in foreign countries $ 2.0 $ 2.0