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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

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- Definition Represents the number of restaurants. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- 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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Namespace Prefix: | us-gaap_
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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
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- Details
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Namespace Prefix: |
Data Type: | na
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- Details
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Namespace Prefix: |
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- Details
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Namespace Prefix: |
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