Other Operating Expenses (Income), net - Other Operating Expenses (Income), net (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Other Income and Expenses [Abstract]
Net losses (gains) on disposal of assets, restaurant closures and refranchisings	$ 7	$ 19	$ 29
Litigation settlements and reserves, net	2	11	2
Net losses (gains) on foreign exchange	(15)	(33)	77
Other, net	(4)	11	1
Other operating expenses (income), net	$ (10)	$ 8	$ 109