Annual report pursuant to Section 13 and 15(d)

Description of Business and Summary of Significant Accounting Policies (Details 2)

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Description of Business and Summary of Significant Accounting Policies (Details 2) - USD ($)
$ in Millions
 3 Months Ended 4 Months Ended 12 Months Ended
Dec. 30, 2018
Oct. 07, 2018
Jul. 15, 2018
Dec. 31, 2017
Oct. 01, 2017
Jul. 09, 2017
Apr. 22, 2018
Apr. 16, 2017
Dec. 30, 2018
Dec. 31, 2017
Dec. 25, 2016
Description of business and summary of significant accounting policies                      
Duration of fiscal period 84 days 84 days 84 days 91 days 84 days 84 days 112 days 112 days 364 days 371 days 364 days
Length of next fiscal year                 364 days    
Accounts Receivable                      
Gift cards in transit in accounts receivable $ 13.8     $ 14.3         $ 13.8 $ 14.3  
Tenant improvement allowances 2.4     2.2         2.4 2.2  
Inventories                      
Food and beverage inventories 8.7     9.0         8.7 9.0  
Supplies inventories $ 18.6     $ 20.6         $ 18.6 $ 20.6  
Minimum                      
Description of business and summary of significant accounting policies                      
Duration of fiscal period                 364 days    
Cash Equivalents                      
Period for conversion of amounts receivable from credit card issuers into cash                 2 days    
Maximum                      
Description of business and summary of significant accounting policies                      
Duration of fiscal period                 371 days    
Cash Equivalents                      
Period for conversion of amounts receivable from credit card issuers into cash                 4 days