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Restaurant Information by Ownership Type (Details) - Restaurant	Sep. 30, 2018	Sep. 30, 2017
Segment Reporting Information [Line Items]
Number of Restaurants	37,557	36,976
Franchised
Segment Reporting Information [Line Items]
Number of Restaurants	34,745	33,746
Franchised | Conventional franchised
Segment Reporting Information [Line Items]
Number of Restaurants	21,586	21,214
Franchised | Developmental licensed
Segment Reporting Information [Line Items]
Number of Restaurants	7,103	6,824
Franchised | Affiliated
Segment Reporting Information [Line Items]
Number of Restaurants	6,056	5,708
Company-operated
Segment Reporting Information [Line Items]
Number of Restaurants	2,812	3,230

X

- Definition

Represents the number of restaurants.

+ References

No definition available.

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Data Type:	xbrli:integerItemType
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X

- Definition

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.

+ References

No definition available.

+ Details

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- Details

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Namespace Prefix:
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X

- Details

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X

- Details

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X

- Details

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X

- Details

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