Other Operating Expenses (Income), net - Other Operating Expenses (Income), Net (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Other Income and Expenses [Abstract]
Net losses (gains) on disposal of assets, restaurant closures and refranchisings	$ 2	$ 6	$ 7
Litigation settlements and reserves, net	81	7	2
Net losses (gains) on foreign exchange	(76)	100	(15)
Other, net	0	(8)	(4)
Other operating expenses (income), net	$ 7	$ 105	$ (10)