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Summary of Significant Accounting Policies (Advertising Costs) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 27, 2015
Dec. 28, 2014
Dec. 31, 2013
Other restaurant operating [Member]      
Schedule of Advertising Costs [Line Items]      
Advertising expense $ 161.6 $ 191.1 $ 182.4