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Estimated Future Amortization Expense for Intangible Assets (Detail) - USD ($)
$ in Millions
Dec. 26, 2015
Dec. 27, 2014
Finite Lived Intangible Assets And Liabilities Future Amortization Expense [Line Items]    
2016 $ 12  
2017 7  
2018 5  
2019 5  
2020 5  
Thereafter 20  
Net Carrying Value $ 54 $ 72