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Introduction and Basis of Presentation (Details)	Jun. 26, 2024 restaurant
Franchisor Disclosure [Line Items]
Number of restaurants	1,603
Denny's Brand
Franchisor Disclosure [Line Items]
Number of restaurants	1,541
Keke's
Franchisor Disclosure [Line Items]
Number of restaurants	62
Franchised/licensed Restaurants
Franchisor Disclosure [Line Items]
Number of restaurants	1,528
Franchised/licensed Restaurants | Denny's Brand
Franchisor Disclosure [Line Items]
Number of restaurants	1,477
Franchised/licensed Restaurants | Keke's
Franchisor Disclosure [Line Items]
Number of restaurants	51
Company Restaurants
Franchisor Disclosure [Line Items]
Number of restaurants	75
Company Restaurants | Denny's Brand
Franchisor Disclosure [Line Items]
Number of restaurants	64
Company Restaurants | Keke's
Franchisor Disclosure [Line Items]
Number of restaurants	11

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