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Debt Financing - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
12 Months Ended 1 Months Ended 12 Months Ended 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Feb. 28, 2012
Issuance of Debt
Due After Ten Year
Feb. 28, 2012
Issuance of Debt
Due After Thirty Years
Dec. 31, 2011
Employee Stock Ownership Plan (ESOP), Plan
Dec. 31, 2010
Employee Stock Ownership Plan (ESOP), Plan
Dec. 31, 2011
Revolving Credit Facility Expiring in Twenty Sixteen
Dec. 31, 2011
Revolving Credit Facility Expiring in Twenty Sixteen
Unused lines of Credit
Dec. 31, 2011
Outside the U.S.
Dec. 31, 2010
Outside the U.S.
Dec. 31, 2011
Outside the U.S.
Unused lines of Credit
Debt Disclosure [Line Items]                        
Unused Line of credit                 $ 1,500.0     $ 838.9
Unused Line of credit agreement, fees                 0.065%      
Description of Line of credit agreement fee               Fees and interest rates on this line are based on the Company's long-term credit rating assigned by Moody's and Standard & Poor's.        
Weighted-average interest rate on short-term borrowings 4.60% 4.30%                    
Unused Line of credit agreement, description of currency                       Denominated in various currencies
Unused Line of credit agreement, description of interest rate                       Local market rates of interest
Foreign currency bank line borrowings                   640.3 595.0  
Commercial paper                   250.0    
Debt, face amount 1,367.3 1,931.8 1,169.3 250.0 500.0              
Debt, maturity period       10 years 30 years              
Debt, coupon rate       2.625% 3.70%              
Leveraged Employee Stock Ownership Plan (ESOP), loan amount           39.6            
Additional paid-in capital $ 5,487.3 $ 5,196.4       $ 34.4 $ 41.7          
Leveraged Employee Stock Ownership Plan (ESOP), terms of the loan The ESOP is repaying the loans and interest through 2018 using Company contributions and dividends from its McDonald's common stock holdings.