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Acquisitions - Narrative (Details)
$ in Millions
12 Months Ended
Dec. 31, 2018
USD ($)
store
Nov. 30, 2018
store
Feb. 28, 2018
store
Dec. 31, 2017
store
Business Acquisition [Line Items]        
Purchase price | $ $ 125.4      
Cash paid | $ 113.7      
Liabilities incurred | $ 11.7      
Revenue since acquisition | $ 46.0      
Transaction and integration costs | $ 5.0      
Net earnings since acquisition | $ $ 0.4      
Mexico        
Business Acquisition [Line Items]        
Number of stores acquired       5
United States        
Business Acquisition [Line Items]        
Number of stores acquired       1
Latin America Operations        
Business Acquisition [Line Items]        
Number of stores acquired 366 240 126  
Number of acquisitions 6 5    
Latin America Operations | Franchise [Member]        
Business Acquisition [Line Items]        
Number of stores acquired 221      
U.S. Acquisitions        
Business Acquisition [Line Items]        
Number of stores acquired 27      
Number of acquisitions 9