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Business operations and segment information Geographical Information (Details) (USD $)
12 Months Ended
Dec. 29, 2013
Dec. 30, 2012
Dec. 25, 2011
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenues $ 5,161,362,000 $ 5,353,197,000 $ 5,239,989,000
Foreign Countries [Member]
     
Revenues from External Customers and Long-Lived Assets [Line Items]      
Revenues 519,800,000 546,200,000 567,700,000
Long-Lived Assets $ 566,400,000 $ 529,800,000 $ 542,900,000