Segment Information (Narrative) (Details) (United States/Canada [Member], USD $) In Millions, unless otherwise specified	12 Months Ended
	Aug. 31, 2014	Aug. 31, 2013	Aug. 31, 2012
United States/Canada [Member]
Segment Reporting Information [Line Items]
Capital expenditures related to capitalized curriculum	$ 7.8	$ 2.6	$ 2.1