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Introduction and Basis of Reporting (Details) | 12 Months Ended
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Dec. 27, 2017 Countries restaurant States Territories
Franchisor Disclosure [Line Items] |
Number of states in which entity operates | States | 50
Number of territories in which entity operates | Territories | 2
Number of foreign countries in which entity operates | Countries | 12
Number of restaurants | 1,735
Franchised and licensed restaurants [Member] |
Franchisor Disclosure [Line Items] |
Number of restaurants | 1,557
Company-owned restaurants [Member] |
Franchisor Disclosure [Line Items] |
Number of restaurants | 178
California [Member] |
Franchisor Disclosure [Line Items] |
Percentage of restaurants operated by geographic region | 23.00%
Texas [Member] |
Franchisor Disclosure [Line Items] |
Percentage of restaurants operated by geographic region | 11.00%
Florida [Member] |
Franchisor Disclosure [Line Items] |
Percentage of restaurants operated by geographic region | 8.00%

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