Leases - Summary of Supplemental Balance Sheet (Details) - USD ($) $ in Millions	Dec. 31, 2020	Dec. 31, 2019
Schedule Of Lease Assets And Liabilities [Abstract]
Operating lease right-of-use assets	$ 2,164	$ 1,985
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	yumc:OperatingLeaseRightOfUseAsset1Member	yumc:OperatingLeaseRightOfUseAsset1Member
Finance lease right-of-use assets	$ 20	$ 18
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	us-gaap:PropertyPlantAndEquipmentMember	us-gaap:PropertyPlantAndEquipmentMember
Total leased assets	$ 2,184	$ 2,003
Operating leases liabilities	448	382
Finance lease liabilities, Current	$ 2	$ 2
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:AccountsPayableAndAccruedLiabilitiesCurrent	us-gaap:AccountsPayableAndAccruedLiabilitiesCurrent
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:AccountsPayableAndAccruedLiabilitiesCurrent	us-gaap:AccountsPayableAndAccruedLiabilitiesCurrent
Non-current operating lease liabilities	$ 1,915	$ 1,803
Non-current finance lease liabilities	$ 28	$ 26
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	yumc:NonCurrentOperatingLeasesLiabilities1Member	yumc:NonCurrentOperatingLeasesLiabilities1Member
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	yumc:NonCurrentFinancingLeasesLiabilities1Member	yumc:NonCurrentFinancingLeasesLiabilities1Member
Total lease liabilities	$ 2,393	$ 2,213