Summary of Significant Accounting Policies - Property, Plant and Equipment (Details)	12 Months Ended
	Aug. 31, 2017
Buildings and improvements | Minimum
Property Plant And Equipment [Line Items]
Estimated useful lives	5 years
Buildings and improvements | Maximum
Property Plant And Equipment [Line Items]
Estimated useful lives	20 years
Machinery and equipment | Minimum
Property Plant And Equipment [Line Items]
Estimated useful lives	1 year
Machinery and equipment | Maximum
Property Plant And Equipment [Line Items]
Estimated useful lives	10 years
Leasehold improvements | Minimum
Property Plant And Equipment [Line Items]
Estimated useful lives	2 years
Leasehold improvements | Maximum
Property Plant And Equipment [Line Items]
Estimated useful lives	15 years
Other equipment | Minimum
Property Plant And Equipment [Line Items]
Estimated useful lives	2 years
Other equipment | Maximum
Property Plant And Equipment [Line Items]
Estimated useful lives	6 years