Goodwill and Intangible Assets (Details 1) - USD ($) $ in Millions		Sep. 30, 2021		Dec. 31, 2020
Finite-lived intangible assets
Gross Carrying Amount		$ 285	[1]	$ 283
Accumulated Amortization		(192)		(161)
Accumulated impairment losses	[2]	(14)		(14)
Net Carrying Amount		79		108
Indefinite-lived intangible assets
Net Carrying Amount		139		138
Total intangible assets
Gross Carrying Amount		424	[1]	421
Intangible assets, net		218		246
Little Sheep [Member] | Trademark [Member]
Indefinite-lived intangible assets
Net Carrying Amount		56		56
Huang Ji Huang Group [Member] | Trademark [Member]
Indefinite-lived intangible assets
Net Carrying Amount		83		82
Reacquired franchise rights [Member]
Finite-lived intangible assets
Gross Carrying Amount		225	[1]	223
Accumulated Amortization		(173)		(144)
Net Carrying Amount		52		79
Huang Ji Huang Group [Member]
Finite-lived intangible assets
Gross Carrying Amount		23	[1]	23
Accumulated Amortization		(2)		(1)
Net Carrying Amount		21		22
Daojia platform [Member]
Finite-lived intangible assets
Gross Carrying Amount		16	[1]	16
Accumulated Amortization		(4)		(4)
Accumulated impairment losses	[2]	(12)		(12)
Customer-related assets [Member]
Finite-lived intangible assets
Gross Carrying Amount		12	[1]	12
Accumulated Amortization		(9)		(8)
Accumulated impairment losses	[2]	(2)		(2)
Net Carrying Amount		1		2
Others [Member]
Finite-lived intangible assets
Gross Carrying Amount		9	[1]	9
Accumulated Amortization		(4)		(4)
Net Carrying Amount		$ 5		$ 5

[1] Changes in gross carrying amount include effect of currency translation adjustments.

[2] Accumulated impairment losses represent impairment charges on intangible assets acquired from Daojia primarily attributable to the Daojia platform.