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Leases Leases (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended 1 Months Ended
Dec. 27, 2012
Dec. 29, 2011
Dec. 30, 2010
Dec. 31, 1995
UATC
Property
Dec. 27, 2012
UATC
Theatre
Leases [Abstract]          
Period that must be exceeded to qualify for disclosure as a noncancelable operating lease (in years) 1 year        
Future minimum rental payments under non-cancelable operating leases          
2013 $ 35.9        
2014 34.3        
2015 33.3        
2016 19.8        
2017 10.9        
Thereafter 18.9        
Total 153.1        
Sale and leaseback rentals 15.1 15.1 14.9    
Minimum Rental Expense 35.6 35.2 36.3    
Contingent Rent Expense 1.0 0.9 1.5    
Sale Leaseback Transaction          
Sale Leaseback Transaction, Number of Properties       31  
Sale Leaseback Transaction, Number of Theatres         11
Sale Leaseback Transaction, Pass Through Certificates, Principal Outstanding         $ 21.1