Goodwill and Intangible Assets (Details) - USD ($) $ in Millions		6 Months Ended
		Jun. 30, 2021	Dec. 31, 2020
Goodwill [Line Items]
Goodwill, gross		$ 1,232	$ 1,223
Accumulated impairment losses	[1]	(391)	(391)
Goodwill, net		841	832
Effect of currency translation adjustments		9
KFC [Member]
Goodwill [Line Items]
Goodwill, gross		756	748
Goodwill, net		756	748
Effect of currency translation adjustments		8
Pizza Hut [Member]
Goodwill [Line Items]
Goodwill, gross		20	20
Goodwill, net		20	20
All Other Segments [Member]
Goodwill [Line Items]
Goodwill, gross		456	455
Accumulated impairment losses	[1]	(391)	(391)
Goodwill, net		65	$ 64
Effect of currency translation adjustments		$ 1

[1] Accumulated impairment losses represent goodwill impairment attributable to the reporting units of Little Sheep and Daojia.