Concentration of Risk and Segment Data - Narrative (Details)	3 Months Ended
	Nov. 30, 2018 Customer Country	Nov. 30, 2017
Revenue, Major Customer [Line Items]
Number of operating countries | Country	29
Net Revenue | Geographic Concentration Risk | Foreign
Revenue, Major Customer [Line Items]
Concentration risk, percentage	92.70%	92.30%
Five Largest Customers That Account for a Percentage of Net Revenue | Net Revenue | Customer Concentration Risk
Revenue, Major Customer [Line Items]
Top customers that comprise revenue	5
Concentration risk, percentage	48.00%
Group of Customers That Account for 90% of Net Revenue | Net Revenue | Customer Concentration Risk
Revenue, Major Customer [Line Items]
Top customers that comprise revenue	75
Concentration risk, percentage	90.00%