Schedule of Stockholders' Equity (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 24, 2016	Sep. 30, 2017	Sep. 24, 2016
Stockholders Equity [Line Items]
Beginning Balance			$ 1,852
Net income	$ 92	$ 193	233	$ 449
Repurchase of common stock for treasury	(17)		(34)
Dividends paid on common stock			(39)
Share purchase for taxes, net of proceeds on employee-related plans			(17)
Other comprehensive income	(1)	$ 3	22	$ 13
Amortization of long-term incentive stock grants			25
Ending Balance	$ 2,042		$ 2,042