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Acquisition of businesses - Narrative (Details) - USD ($)
$ in Thousands
 12 Months Ended
Aug. 03, 2007
Dec. 31, 2020
Business Acquisition [Line Items]    
Length of MFAs 20 years  
First Ten Years    
Business Acquisition [Line Items]    
First franchise fee payment period   10 years
Royalty fee (as a percent)   5.00%
Next Five Years    
Business Acquisition [Line Items]    
Royalty fee (as a percent)   6.00%
Subsequent period of the agreement   5 years
Last Five Years    
Business Acquisition [Line Items]    
Royalty fee (as a percent)   7.00%
Subsequent period of the agreement   5 years
Latin America and Caribbean McDonald's    
Business Acquisition [Line Items]    
Final purchase price $ 698,080