Schedule of Stockholders' Equity (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 26, 2015	Sep. 27, 2014	Sep. 26, 2015	Sep. 27, 2014
Stockholders Equity [Line Items]
Beginning Balance			$ 1,621
Net loss	$ 6	$ 29	(7)	$ (270)
Other comprehensive loss	(22)	$ (55)	(73)	$ (46)
Share transactions under employee-related plans			7
Amortization of long-term incentive stock grants			32
Ending Balance	$ 1,580		$ 1,580