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Summary of Activity Related to Unrecognized Tax Benefit (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 26, 2015
Dec. 27, 2014
Dec. 28, 2013
Unrecognized Tax Benefits Summary [Line Items]      
Beginning balance $ 23 $ 15 $ 5
Increase related to current year tax positions 1 7 4
Increase related to prior year tax positions 1 4  
Decrease related to prior year tax positions (6) (2)  
Decrease related to lapse of statute of limitations (1)    
Decrease related to settlements with taxing authorities   (1)  
Increase related to the Merger     6
Ending balance $ 18 $ 23 $ 15