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Leasing Arrangements - Additional Information (Detail)
$ in Millions
 12 Months Ended
Dec. 31, 2016
USD ($)
Restaurant
Dec. 31, 2015
USD ($)
Restaurant
Dec. 31, 2014
USD ($)
Restaurant
Operating Leased Assets [Line Items]      
Number of Restaurants 36,899 36,525 36,258
Lease term 20 years    
Company-operated restaurants:      
Operating Leased Assets [Line Items]      
Number of Restaurants 5,669 6,444 6,714
Rents in excess of minimum rents | $ $ 135.0 $ 146.6 $ 164.2
Franchised restaurants:      
Operating Leased Assets [Line Items]      
Number of Restaurants 31,230 30,081 29,544
Rents in excess of minimum rents | $ $ 186.4 $ 178.8 $ 182.8
Ground Leases      
Operating Leased Assets [Line Items]      
Number of Restaurants 14,763    
Minimum      
Operating Leased Assets [Line Items]      
Escalation timing 1 year    
Maximum      
Operating Leased Assets [Line Items]      
Escalation timing 5 years