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Introduction and Basis of Reporting	12 Months Ended
Introduction and Basis of Reporting	Dec. 27, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Introduction and Basis of Reporting	Introduction and Basis of Reporting Denny’s Corporation, or Denny’s, is one of America’s largest franchised full-service restaurant chains based on number of restaurants. Denny’s restaurants are operated in all 50 states, the District of Columbia, two U.S. territories and 12 foreign countries with principal concentrations in California (23% of total restaurants), Texas (11%) and Florida (8%). At December 27, 2017, the Denny's brand consisted of 1,735 restaurants, 1,557 of which were franchised/licensed restaurants and 178 of which were company operated.