New Accounting Pronouncements (Policies)	9 Months Ended
New Accounting Pronouncements (Policies)	Sep. 30, 2019
Accounting Changes and Error Corrections [Abstract]
New Accounting Pronouncements	Lease Accounting – In February 2016, the Financial Accounting Standard Board (the “FASB”) issued new guidance on leases. We adopted this new guidance on January 1, 2019. See Note 4, Leases, for further information about our transition to this new lease accounting standard. Goodwill Impairment – In January 2017, the FASB issued guidance to simplify how an entity measures goodwill impairment by removing the second step of the two-step quantitative goodwill impairment test. An entity will no longer be required to perform a hypothetical purchase price allocation to measure goodwill impairment. Instead, impairment will be measured at the amount by which the carrying value exceeds the fair value of a reporting unit; however, the loss recognized should not exceed the total amount of goodwill allocated to that reporting unit. The amendment requires prospective adoption and is effective commencing in 2020 with early adoption permitted. The adoption of this new guidance will not have a material impact on our Financial Statements. Reclassification of Certain Tax Effects – In February 2018, the FASB issued guidance which allows a reclassification from accumulated other comprehensive income (loss) to retained earnings for the tax effects of certain items within accumulated other comprehensive income (loss). The amendment is effective commencing in 2019 with early adoption permitted. The adoption of this new guidance did not have a material impact on our Financial Statements. Share-based payment arrangements with nonemployees – In June 2018, the FASB issued guidance which simplifies the accounting for share-based payments granted to nonemployees for goods and services. Most of the guidance on such payments to nonemployees would be aligned with the requirements for share-based payments granted to employees. The amendment is effective commencing in 2019 with early adoption permitted. The adoption of this new guidance did not have a material impact on our Financial Statements.
Lessor Accounting	Lessor Accounting We recognize lease payments for operating leases as property revenue on a straight-line basis over the lease term and property revenue is presented net of any related sales tax. Lease incentive payments we make to lessees are amortized as a reduction in property revenue over the lease term. We account for reimbursements of maintenance and property tax costs paid to us by lessees as variable lease payment property revenue. We also have net investments in properties leased to franchisees, which met the criteria of direct financing leases under the Previous Standard. Investments in direct financing leases are recorded on a net basis, consisting of the gross investment and estimated residual value in the lease, less unearned income. Unearned income on direct financing leases is recognized over the lease term yielding a constant periodic rate of return on the net investment in the lease. We do not remeasure the net investment in a direct financing lease unless the lease is modified and that modification is not accounted for as a separate contract. We recognize variable lease payment income for operating and direct financing leases in the period when changes in facts and circumstances on which the variable lease payments are based occur.
Lessee Accounting	Lessee Accounting In leases where we are the lessee, we recognize an ROU asset and lease liability at lease commencement, which are measured by discounting lease payments using our incremental borrowing rate as the discount rate. We determine the incremental borrowing rate applicable to each lease by reference to our outstanding secured borrowings and implied spreads over the risk-free discount rates that correspond to the term of each lease, as adjusted for the currency of the lease. Subsequent amortization of the ROU asset and accretion of the lease liability for an operating lease is recognized as a single lease cost, on a straight-line basis, over the lease term. Amortization of the ROU asset and the change in the lease liability are included in changes in Other long-term assets and liabilities in the Condensed Consolidated Statement of Cash Flows. A finance lease ROU asset is depreciated on a straight-line basis over the lesser of the useful life of the leased asset or lease term. Interest on each finance lease liability is determined as the amount that results in a constant periodic discount rate on the remaining balance of the liability. ROU assets are assessed for impairment in accordance with our long-lived asset impairment policy. We reassess lease classification and remeasure ROU assets and lease liabilities when a lease is modified and that modification is not accounted for as a separate contract or upon certain other events that require reassessment in accordance with ASC 842. Maintenance and property tax expenses are accounted for on an accrual basis as variable lease cost. We recognize variable lease cost for operating and finance leases in the period when changes in facts and circumstances on which the variable lease payments are based occur.
Contract Liabilities	Contract liabilities consist of deferred revenue resulting from initial and renewal franchise fees paid by franchisees, as well as upfront fees paid by master franchisees, which are generally recognized on a straight-line basis over the term of the underlying agreement. We classify these contract liabilities as Other liabilities, net in our condensed consolidated balance sheets
Earnings Per Share, Basic & Diluted	Basic and diluted earnings per share is computed using the weighted average number of shares outstanding for the period. We apply the treasury stock method to determine the dilutive weighted average common shares represented by Partnership exchangeable units and outstanding equity awards, unless the effect of their inclusion is anti-dilutive. The diluted earnings per share calculation assumes conversion of 100% of the Partnership exchangeable units under the “if converted” method. Accordingly, the numerator is also adjusted to include the earnings allocated to the holders of noncontrolling interests.