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Income Taxes (Details 4)
$ in Millions
Dec. 26, 2015
USD ($)
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]  
Amount of unrecognized tax benefits that may decrease in the next 12 months $ 6
Impact On Next Years' Effective Tax Rate [Member]  
Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Line Items]  
Amount of unrecognized tax benefits that may decrease in the next 12 months $ 4