Summary of Significant Accounting Policies (Details 3) $ in Millions	12 Months Ended
	Dec. 31, 2018 USD ($) Years	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Impairment or Disposal of Property, Plant and Equipment [Abstract]
Number of consecutive years of operating losses used as primary indicator of potential impairment for our semi-annual impairment testing of restaurant assets | Years	2
Leases and Leasehold Improvements [Abstract]
Approximate number of restaurants operated on leased land and/or buildings	517
Goodwill and Intangible Assets [Abstract]
Goodwill Written Off Related To Sale Of Business Unit Years From Acquisition | Years	2
Fair Value Goodwill Written Off Related To Sale Of Business Unit Minimum Years Refranchised | Years	2
Minimum [Member] | Buildings and improvements
Property, Plant and Equipment [Line Items]
Estimated useful life used in the calculation of the depreciation and amortization on a straight-line basis (in years)	5 years
Minimum [Member] | Machinery and equipment
Property, Plant and Equipment [Line Items]
Estimated useful life used in the calculation of the depreciation and amortization on a straight-line basis (in years)	3 years
Maximum [Member] | Buildings and improvements
Property, Plant and Equipment [Line Items]
Estimated useful life used in the calculation of the depreciation and amortization on a straight-line basis (in years)	25 years
Maximum [Member] | Machinery and equipment
Property, Plant and Equipment [Line Items]
Estimated useful life used in the calculation of the depreciation and amortization on a straight-line basis (in years)	20 years
Continuing Operations [Member]
Property, Plant and Equipment [Line Items]
Deferred Tax Assets, Net of Valuation Allowance, Current | $	$ 195	$ 139
Foreign Currency [Abstract]
Foreign currency translation adjustment | $	245
Direct Marketing Costs [Abstract]
Advertising Expense | $	$ 131	$ 245	$ 260