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Summary of Significant Accounting Policies (Details 7) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2013
item
Dec. 25, 2012
Dec. 27, 2011
Derivative Instruments and Hedging Activities      
Number of free standing interest rate swap agreements 2    
Amount of hedge ineffectiveness $ 0 $ 0 $ 0