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Significant Accounting Policies - Equity Method Investments and Stock-Based Compensation (Details) - country
Dec. 26, 2019
Dec. 31, 2020
Equity Method Investments    
Number of countries in which the entity operates   20
Stock distributed to parent (as a percent) 100.00%  
Maximum    
Equity Method Investments    
General ownership percentage for equity method investments   50.00%
Minimum    
Equity Method Investments    
General ownership percentage for equity method investments   20.00%