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Summary of Significant Accounting Policies - Additional Information (Detail) (USD $)
Share data in Millions, unless otherwise specified
 12 Months Ended
Dec. 31, 2011
Year
Dec. 31, 2010
Dec. 31, 2009
Significant Accounting Policies [Line Items]      
Advertising costs of Company-operated restaurants $ 768,600,000 $ 687,000,000 $ 650,800,000
Other marketing-related expenses 74,400,000 94,500,000 94,700,000
Dilutive effect of share-based compensation 12.8 14.3 15.2
Stock options that were not included in diluted weighted-average shares 0 0 0.7
Unrecognized compensation cost related to nonvested share-based compensation that is expected to be recognized 84,700,000    
Weighted-average expected recognition period for unrecognized share-based compensation costs 2.1    
Goodwill impairment test period 24 months    
Long-lived assets impairment test period 24 months    
Cumulative deferred hedging gains, after tax, included in accumulated other comprehensive income 4,600,000    
Debt obligations, fair value 14,200,000,000    
Debt obligations, carrying amount 12,500,000,000    
Fixed-rate debt converted to floating-rate debt from the use of interest rate exchange agreements 2,000,000,000    
Notional amount of derivatives used to hedge foreign royalties 228,000,000    
Foreign currency denominated debt designated to hedge investments in certain foreign subsidiaries and affiliates 4,300,000,000    
Net increase (decrease) after-tax related to the cash flow hedges component of accumulated OCI in shareholders' equity (10,400,000) (1,500,000) (31,500,000)
Interest Rate Swap
      
Significant Accounting Policies [Line Items]      
Anticipated debt issuance converted to fixed rate by the use of interest rate swaps 250,000,000    
Derivatives in Cash Flow Hedging Relationships
      
Significant Accounting Policies [Line Items]      
Net increase (decrease) after-tax related to the cash flow hedges component of accumulated OCI in shareholders' equity $ (10,400,000) $ (1,500,000)  
Building
      
Significant Accounting Policies [Line Items]      
Property and equipment, estimated useful life maximum 40    
Leasehold Improvements
      
Significant Accounting Policies [Line Items]      
Property and equipment, estimated useful life The lesser of useful lives of assets or lease terms    
Equipment
      
Significant Accounting Policies [Line Items]      
Property and equipment, estimated useful life minimum 3    
Property and equipment, estimated useful life maximum 12    
Maximum
      
Significant Accounting Policies [Line Items]      
Long lived assets disposal period 12 months    
Cash equivalents, maturity period for short-term highly liquid investments 90 days