Refranchising Initiative (Narrative) (Details) - franchise	3 Months Ended	6 Months Ended
Feb. 28, 2017	Feb. 28, 2017
Refranchising Initiative 2017 [Member]
Franchisor Disclosure [Line Items]
Refranchised company drive-ins	54	110

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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