Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation and Recent Accounting Pronouncements - Additional Information (Details)

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Basis of Presentation and Recent Accounting Pronouncements - Additional Information (Details)
$ in Millions
4 Months Ended
Apr. 22, 2018
USD ($)
state
province
fund
restaurant
entree
segment
Apr. 16, 2017
USD ($)
Dec. 31, 2017
USD ($)
Franchisor Disclosure [Line Items]      
Number of operating segments | segment 1    
Number of reportable segments | segment 1    
Number of marketing and national media funds to which the entity and franchisees must contribute a minimum percentage of revenue | fund 2    
Number of entrees to be purchased for each free entree | entree 9    
Royalties as a percentage of franchised adjusted gross restaurant sales 4.00%    
Term of franchise rights 20 years    
Additional term of franchise rights 10 years    
Unearned gift card revenue      
Franchisor Disclosure [Line Items]      
Contract liabilities $ 33.1   $ 45.4
Deferred loyalty revenue      
Franchisor Disclosure [Line Items]      
Contract liabilities $ 10.3   $ 10.6
Other Operating | Adjustments      
Franchisor Disclosure [Line Items]      
Local marketing costs   $ (2.6)  
Selling, General and Administrative Expenses | Adjustments      
Franchisor Disclosure [Line Items]      
Local marketing costs   $ 2.6  
Company-owned operated restaurants      
Franchisor Disclosure [Line Items]      
Number of restaurants | restaurant 484    
Number of states in which restaurants are located | state 39    
Number of Canadian provinces in which restaurants are located | province 2    
Franchised restaurants      
Franchisor Disclosure [Line Items]      
Number of restaurants | restaurant 87    
Number of states in which restaurants are located | state 15    
Minimum      
Franchisor Disclosure [Line Items]      
Royalties as a percentage of adjusted gross restaurant sales 0.50%    
Maximum      
Franchisor Disclosure [Line Items]      
Royalties as a percentage of adjusted gross restaurant sales 2.50%