Employee Severance and Termination Costs - Additional Information (Detail) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 23, 2016 USD ($) Employee	Sep. 25, 2015 USD ($)	Sep. 23, 2016 USD ($) Employee	Sep. 25, 2015 USD ($)	Dec. 31, 2015 USD ($) Employee
Restructuring and Related Activities [Abstract]
Employee severance and other termination costs	$ 5	$ 4	$ 11	$ 10	$ 18
Number of employees terminated | Employee	600		600		800
Remaining balance of employee termination costs	$ 8		$ 8		$ 9