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Summary of Valuation Allowances (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2016
Dec. 26, 2015
Dec. 27, 2014
Income Taxes [Line Items]      
Beginning balance $ 522    
Ending balance 140 $ 522  
Valuation Allowance of Deferred Tax Assets      
Income Taxes [Line Items]      
Beginning balance 522 571 $ 448
Additions, charged to expense     123
Reductions (382) (49)  
Ending balance $ 140 $ 522 $ 571