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Document and Entity Information
Jul. 01, 2020
Cover [Abstract]  
Document Type 8-K
Amendment Flag false
Document Period End Date Jul. 01, 2020
Entity Registrant Name DENNY’S CORPORATION
Entity Incorporation, State or Country Code DE
Entity File Number 0-18051
Entity Tax Identification Number 13-3487402
Entity Address, Address Line One 203 East Main Street
Entity Address, City or Town Spartanburg
Entity Address, State or Province SC
Entity Address, Postal Zip Code 29319-0001
City Area Code 864
Local Phone Number 597-8000
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Entity Emerging Growth Company false
Entity Central Index Key 0000852772
Title of 12(b) Security $0.01 Par Value, Common Stock
Trading Symbol DENN
Security Exchange Name NASDAQ