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Restaurant Information by Ownership Type (Details) - Restaurant	Sep. 30, 2021	Sep. 30, 2020
Segment Reporting Information [Line Items]
Number of Restaurants	39,676	39,096
Franchised
Segment Reporting Information [Line Items]
Number of Restaurants	36,986	36,438
Franchised | Conventional franchised
Segment Reporting Information [Line Items]
Number of Restaurants	21,552	21,781
Franchised | Developmental licensed
Segment Reporting Information [Line Items]
Number of Restaurants	7,795	7,660
Franchised | Affiliated
Segment Reporting Information [Line Items]
Number of Restaurants	7,639	6,997
Company-operated
Segment Reporting Information [Line Items]
Number of Restaurants	2,690	2,658

X

- Definition

Represents the number of restaurants.

+ References

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Namespace Prefix:	us-gaap_
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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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