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Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($)
shares in Millions, $ in Millions
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Significant Accounting Policies [Line Items]      
Franchise fees expected cumulative catch-up adjustment 2.00%    
Derivative Liability, Fair Value, Gross Liability $ 5.6 $ 44.4  
Advertising costs of Company-operated restaurants 645.8 718.7 $ 808.2
Other marketing-related expenses 88.8 113.8 98.7
Unrecognized compensation cost related to nonvested share-based compensation that is expected to be recognized $ 89.6    
Weighted-average expected recognition period for unrecognized share-based compensation costs 2 years    
Long lived assets impairment test period 12 months    
Goodwill impairment test period 24 months    
Fair value goodwill written off related to sale of restaurant minimum months Company-operated 24 months    
Goodwill, Impaired, Accumulated Impairment Loss $ 96.6 94.1  
Debt obligations, carrying amount 26,000.0    
Net increase (decrease) after-tax related to the cash flow hedges component of accumulate OCI in shareholders' equity 2.9 $ (11.0) $ 33.3
Cumulative deferred hedging losses, after tax, included in accumulated other comprehensive income $ (22.9)    
Dilutive effect of share-based compensation 6.8 5.2 5.8
Stock options that were not included in diluted weighted-average shares 1.2 1.0 5.3
Assets of businesses held for sale $ 1,527.0 $ 0.0  
Level 2      
Significant Accounting Policies [Line Items]      
Debt obligations, fair value 27,500.0    
Interest Rate Swap      
Significant Accounting Policies [Line Items]      
Derivative, Notional Amount 2,500.0    
Royalty Arrangement      
Significant Accounting Policies [Line Items]      
Derivative, Notional Amount $ 632.0    
Period covered by hedge 18 months    
Net Investment Hedging Relationships      
Significant Accounting Policies [Line Items]      
Derivative, Notional Amount $ 393.0    
Building [Member]      
Significant Accounting Policies [Line Items]      
Property and equipment, estimated useful life maximum 40 years    
Leasehold Improvements [Member]      
Significant Accounting Policies [Line Items]      
Property and equipment, estimated useful life the lesser of useful lives of assets or lease terms    
Minimum | Equipment [Member]      
Significant Accounting Policies [Line Items]      
Property and equipment, estimated useful life maximum 3 years    
Maximum | Equipment [Member]      
Significant Accounting Policies [Line Items]      
Property and equipment, estimated useful life maximum 12 years    
Intercompany Debt [Member]      
Significant Accounting Policies [Line Items]      
Forgein currency denominated debt designated to hedge investments in certain foreign subsidiaries and affiliates $ 3,300.0    
Debt [Member]      
Significant Accounting Policies [Line Items]      
Forgein currency denominated debt designated to hedge investments in certain foreign subsidiaries and affiliates 8,600.0    
Not Designated as Hedging Instrument [Member]      
Significant Accounting Policies [Line Items]      
Derivative Liability, Fair Value, Gross Liability $ 1.9 5.5  
Nordics Held for Sale      
Significant Accounting Policies [Line Items]      
Number of Stores 450    
Disposal Group, Including Discontinued Operation, Liabilities $ 64.0    
Disposal Group, Including Discontinued Operation, Assets 439.0    
Proceeds from Divestiture of Businesses $ 450.0    
China and Hong Kong Held for Sale      
Significant Accounting Policies [Line Items]      
Number of Stores 2,600    
Businesses held for sale, ownership percentage to be retained 20.00%    
Disposal Group, Including Discontinued Operation, Liabilities $ 592.0    
Disposal Group, Not Discontinued Operation, Estimated Minimum Gain on Disposal 700.0    
Disposal Group, Not Discontinued Operation, Estimated Maximum Gain on Disposal 900.0    
Disposal Group, Including Discontinued Operation, Assets 1,300.0    
Assets of businesses held for sale 217.0    
Proceeds from Divestiture of Businesses 1,500.0    
Accrued payroll and other liabilities | Not Designated as Hedging Instrument [Member] | Foreign currency      
Significant Accounting Policies [Line Items]      
Derivative Liability, Fair Value, Gross Liability 0.0 5.5  
Accrued payroll and other liabilities | Not Designated as Hedging Instrument [Member] | Equity      
Significant Accounting Policies [Line Items]      
Derivative Liability, Fair Value, Gross Liability $ 1.9 $ 0.0