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
Mar. 28, 2015	Mar. 29, 2014
Numerator – Net income (loss):
Net loss	$ (180)us-gaap_NetIncomeLoss	$ (20)us-gaap_NetIncomeLoss
Denominator – Weighted average shares
Weighted-average shares outstanding, basic and diluted	777	761
Basic	$ (0.23)us-gaap_EarningsPerShareBasic	$ (0.03)us-gaap_EarningsPerShareBasic
Diluted	$ (0.23)us-gaap_EarningsPerShareDiluted	$ (0.03)us-gaap_EarningsPerShareDiluted
Stock Options, Restricted Stock and Restricted Stock Units
Earnings per Share [Line Items]
Anti-dilutive shares	64	45

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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- Definition

The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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- Definition

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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