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Financial Statement Presentation (Details)
$ in Millions
 9 Months Ended
Sep. 30, 2018
restaurants
operating_segments
Months
weeks
countries_and_territiories
Jan. 01, 2018
USD ($)
Number of Reportable Segments | operating_segments 3  
Number of Countries in which Entity Operates | countries_and_territiories 140  
Number of Stores | restaurants 45,000  
Percent Of System Units Located Outside United States 61.00%  
Fiscal Period Weeks Standard for U.S. subsidiaries and certain international subsidiaries 12  
Fiscal Period Weeks Standard Fourth Quarter 16  
Number of weeks in a standard year 52  
Fiscal Period Weeks Standard Fourth Quarter of a 53rd Week Year for U.S. subsidiaries and certain international subsidiaries 17  
Number of weeks in a 53rd week year 53  
Fiscal period months standard for each quarter | Months 3  
Accounting Standards Update 2016-16 [Member] | Other Assets [Member]    
Write-off of unamortized tax consequence of certain historical intra-entity transfers of assets | $   $ (30)
Accounting Standards Update 2018-02 [Member]    
Reclassification from accumulated other comprehensive (income) loss to accumulated deficit for stranded tax effects resulting from the Tax Cuts and Jobs Act of 2017 | $   $ 19