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Leasing Arrangements - Additional Information (Detail)
$ in Millions
 12 Months Ended
Dec. 31, 2015
USD ($)
Restaurant
Dec. 31, 2014
USD ($)
Restaurant
Dec. 31, 2013
USD ($)
Restaurant
Operating Leased Assets [Line Items]      
Number of Restaurants 36,525 36,258 35,429
Lease term 20 years    
Company-operated restaurants:      
Operating Leased Assets [Line Items]      
Number of Restaurants 6,444 6,714 6,738
Rents in excess of minimum rents | $ $ 146.6 $ 164.2 $ 175.6
Franchised restaurants:      
Operating Leased Assets [Line Items]      
Number of Restaurants 30,081 29,544 28,691
Rents in excess of minimum rents | $ $ 178.8 $ 182.8 $ 187.4
Ground Leases      
Operating Leased Assets [Line Items]      
Number of Restaurants 15,115    
Minimum      
Operating Leased Assets [Line Items]      
Escalation timing 1 year    
Maximum      
Operating Leased Assets [Line Items]      
Escalation timing 5 years