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Acquisition of Business (Details)
$ in Millions
1 Months Ended 3 Months Ended 12 Months Ended
Dec. 31, 2018
USD ($)
Restaurant
Mar. 31, 2019
USD ($)
Dec. 31, 2018
USD ($)
Business Combinations [Abstract]      
Number of businesses acquired | Restaurant 69    
Business Acquisition [Line Items]      
Capital (finance) lease   $ 100.6  
Applebee's Restaurants In North And South Carolina      
Business Acquisition [Line Items]      
Consideration transferred $ 21.6 21.6 $ 21.6
Assumed capital (finance) lease obligations   9.1  
Capital (finance) lease   $ 28.1