Net Income (Loss) Per Share (Details) (Components of Basic and Diluted Income (Loss) Per Share) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 26, 2015	Sep. 27, 2014	Sep. 26, 2015	Sep. 27, 2014
Numerator – Net income (loss):
Net income (loss)	$ (197)	$ 17	$ (558)	$ (39)
Denominator – Weighted average shares
Weighted-average shares outstanding, basic	785	770	780	765
Employee stock options, restricted stock and restricted stock units	0	15	0	0
Weighted average shares outstanding, diluted	785	785	780	765
Basic	$ (0.25)	$ 0.02	$ (0.72)	$ (0.05)
Diluted	$ (0.25)	$ 0.02	$ (0.72)	$ (0.05)
Stock Options, Restricted Stock and Restricted Stock Units
Earnings per Share
Anti-dilutive shares	64	28	61	46