Schedule Income Tax Expense Related to Income (Loss) From Continuing Operations (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 26, 2015	Dec. 27, 2014
Components Of Income Tax Expense Benefit [Line Items]
Federal, Current	$ 17	$ 18	$ (2)
State, Current	6	4	(1)
Foreign, Current	3	1	3
Federal, Deferred	(210)	(1)
State, Deferred	(37)	2	3
Foreign, Deferred	1	(1)	(1)
Income tax expense (benefit)	$ (220)	$ 23	$ 2