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Summary of Significant Accounting Policies (Details 3) $ in Millions | 12 Months Ended
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Dec. 31, 2017 USD ($) Years | Dec. 31, 2016 USD ($) | Dec. 31, 2015 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 | 900 |  |
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 |  |
Minimum [Member] | Capitalized software costs |  |  |
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 |  |
Maximum [Member] | Capitalized software costs |  |  |
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) | 7 years |  |
Continuing Operations [Member] |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Deferred Tax Assets, Net of Valuation Allowance, Current | $ 139 | $ 772 |
Foreign Currency [Abstract] |  |  |
Foreign currency translation adjustment | 174 |  |
Direct Marketing Costs [Abstract] |  |  |
Advertising Expense | 245 | 260 | $ 253
Research and Development Expenses [Abstract] |  |  |
Research and development expenses | $ 22 | $ 24 | $ 23

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- Definition Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 720 -SubTopic 35 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6420018&loc=d3e36677-107848 + Details
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- Definition The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 730 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6420194&loc=d3e21568-108373 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 985 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6501960&loc=d3e128462-111756 + Details
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- Definition Approximate number of restaurants operated on leased land and/or buildings. + References No definition available. + Details
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- Definition Minimum number of years from acquisition that a company restaurant is sold, after which we include goodwill in the carrying amount of the restaurants disposed of based on the relative fair values of the portion of the reporting unit disposed of in the refranchising and the portion of the reporting unit that will be retained. + References No definition available. + Details
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