Financial Statement Presentation (Details) $ in Millions	3 Months Ended
	Mar. 31, 2018 USD ($) weeks restaurants countries_and_territiories
Number of Countries in which Entity Operates | countries_and_territiories	135
Number of Stores | restaurants	45,000
Percent Of System Units Located Outside United States	60.00%
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
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