Net Income (Loss) Per Share (Details) (Components of Basic and Diluted Income (Loss) Per Share) (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 29, 2013	Jun. 30, 2012	Jun. 29, 2013	Jun. 30, 2012
Numerator
Net income (loss)	$ (74)	$ 37	$ (220)	$ (553)
Denominator
Weighted-average shares outstanding, basic	752	739	751	737
Employee stock options and restricted stock units	0	16	0	0
Weighted-average shares outstanding, diluted	752	755	751	737
Basic net income (loss) per share	$ (0.10)	$ 0.05	$ (0.29)	$ (0.75)
Diluted net income (loss) per share	$ (0.10)	$ 0.05	$ (0.29)	$ (0.75)
5.75% Notes
Denominator
Anti-dilutive shares		24		24
Stock Options and Restricted Stock Units
Denominator
Anti-dilutive shares	52	19	54	18