Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended		36 Months Ended
	Jun. 30, 2018	Dec. 31, 2017	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017	Dec. 31, 2017
Income Tax And Effective Tax Rate [Abstract]
Effective tax rate	9.90%		33.80%	12.90%	26.20%
Provisional discrete net tax expense (benefit)	$ 19
Tax Year 2017 [Member]
Income Tax And Effective Tax Rate [Abstract]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent				35.00%
Tax Year 2018 [Member]
Income Tax And Effective Tax Rate [Abstract]
Limit on deductibility of interest expense				30.00%
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent				21.00%
Tax Cuts and Jobs Act [Member]
Income Tax And Effective Tax Rate [Abstract]
Provisional discrete net tax expense (benefit)	$ (32)	$ 434		$ (16)
Equipment [Member] | Franchise and property expenses [Member] | Unallocated and General and administrative expenses [Domain]
Costs associated with KFC U.S. Acceleration Agreement						$ 115
Equipment [Member] | Franchise and property expenses [Member] | Unallocated and General and administrative expenses [Domain] | Previously Reported [Member]
Costs associated with KFC U.S. Acceleration Agreement			$ 5		$ 8