Leases - Summary of Supplemental Balance Sheet (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Schedule Of Lease Assets And Liabilities [Abstract]
Operating lease right-of-use assets	$ 2,140	$ 2,164
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	yumc:OperatingLeaseRightOfUseAssetMember	yumc:OperatingLeaseRightOfUseAssetMember
Finance lease right-of-use assets	$ 20	$ 20
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	us-gaap:PropertyPlantAndEquipmentMember	us-gaap:PropertyPlantAndEquipmentMember
Total leased assets	$ 2,160	$ 2,184
Operating leases liabilities	440	448
Finance lease liabilities, Current	$ 2	$ 2
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Accounts payable and other current liabilities	Accounts payable and other current liabilities
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]	Accounts payable and other current liabilities	Accounts payable and other current liabilities
Non-current operating lease liabilities	$ 1,882	$ 1,915
Non-current finance lease liabilities	$ 28	$ 28
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	yumc:NonCurrentOperatingLeasesLiabilitiesMember	yumc:NonCurrentOperatingLeasesLiabilitiesMember
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	yumc:NonCurrentFinancingLeasesLiabilitiesMember	yumc:NonCurrentFinancingLeasesLiabilitiesMember
Total lease liabilities	$ 2,352	$ 2,393