Other Operating Expenses (Income), net - Other Operating Expenses (Income), Net (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Other Income and Expenses [Abstract]
Net losses (gains) on disposal of assets, restaurant closures, and refranchisings	$ (10)	$ 3	$ (7)	$ 10
Litigation settlements (gains) and reserves, net	0	0	0	(6)
Net losses (gains) on foreign exchange	12	(33)	(3)	(16)
Other, net	1	0	(4)	(5)
Other operating expenses (income), net	$ 3	$ (30)	$ (14)	$ (17)