Leases - Narrative (Details) $ in Millions	3 Months Ended
	Mar. 31, 2021 USD ($) Restaurant
Schedule Of Lease Assets And Liabilities [Line Items]
Number of restaurants operated | Restaurant	8,300
Additional lease signed but not commenced with total undiscounted minimum lease payments | $	$ 164
Maximum [Member]
Schedule Of Lease Assets And Liabilities [Line Items]
Lease agreements initial terms	20 years
Lease terms	20 years
Minimum [Member]
Schedule Of Lease Assets And Liabilities [Line Items]
Lease agreements initial terms	10 years
Lease terms	1 year