Other Operating Expenses (Income), net - Other Operating Expenses (Income), Net (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Other Income and Expenses [Abstract]
Net losses (gains) on disposal of assets, restaurant closures, and refranchisings	$ 0	$ (10)	$ (2)	$ (7)
Litigation settlements (gains) and reserves, net	1	0	1	0
Net losses (gains) on foreign exchange	18	12	10	(3)
Other, net	2	1	(4)	(4)
Other operating expenses (income), net	$ 21	$ 3	$ 5	$ (14)