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Segment Information (Narrative) (Details)
$ in Millions
12 Months Ended
Aug. 31, 2015
USD ($)
customer
Aug. 31, 2014
USD ($)
Aug. 31, 2013
USD ($)
Segment Reporting Information [Line Items]      
Number of customers accounted for more than ten percent of revenues | customer 0    
United States/Canada [Member]      
Segment Reporting Information [Line Items]      
Capital expenditures related to capitalized curriculum $ 2.2 $ 7.8 $ 2.6