Other Operating Income (Details) $ in Millions	3 Months Ended
Nov. 30, 2016 USD ($)
Other Income and Expenses [Abstract]
Gain on sale of investments in franchise operations	$ 3.8

Amount of gain (loss) on sale or disposal of other assets.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration