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Commitments And Contingencies (Narrative) (Detail) (USD $)
In Millions, unless otherwise specified
 12 Months Ended
Dec. 29, 2012
D
Dec. 31, 2011
Jan. 01, 2011
Commitment And Contingencies [Line Items]      
Rent expense, net of sub-lease rental income $ 29.7 $ 31.7 $ 33.2
Franchisee loans sold with recourse provisions 13.3 13.9  
Minimum term required for loans to recourse (in days) 90    
Pretax arbitration settlement gain $ 18.0    
Workforce Subject To Collective Bargaining Arrangements [Member]
      
Commitment And Contingencies [Line Items]      
Number of employees covered under collective bargaining agreements 2,700    
Percentage of employees covered under collective bargaining agreements 24.00%    
Workforce Subject To Collective Bargaining Agreements Expiring 2013 [Member]
      
Commitment And Contingencies [Line Items]      
Number of employees covered under collective bargaining agreements 900    
Collective bargaining agreements year of expiration 2013