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Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $) In Millions, except Per Share data	Jun. 30, 2011	Dec. 31, 2010
Stockholders' equity:
Common stock and additional paid-in capital, par value	$ 0.0001	$ 0.0001
Common stock and additional paid-in capital, shares authorized	2,750	2,750
Common stock and additional paid-in capital, shares outstanding	924	932

Total number of shares of common stock held by shareholders. May be all or portion of the number of common shares authorized. These shares represent the ownership interest of the common shareholders. Shares outstanding equals shares issued minus shares held in treasury and other adjustments, if any.

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