Introduction and Basis of Reporting (Details)	12 Months Ended
	Dec. 26, 2018 Countries restaurant States Territories
Franchisor Disclosure
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	10
Number of restaurants	1,709
California [Member]
Franchisor Disclosure
Percentage of restaurants operated by geographic region	23.00%
Texas [Member]
Franchisor Disclosure
Percentage of restaurants operated by geographic region	11.00%
Florida [Member]
Franchisor Disclosure
Percentage of restaurants operated by geographic region	8.00%
Franchised and licensed restaurants [Member]
Franchisor Disclosure
Number of restaurants	1,536
Company-owned restaurants [Member]
Franchisor Disclosure
Number of restaurants	173