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Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $) In Millions, except Per Share data, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Condensed Consolidated Balance Sheets [Abstract]
Common stock and additional paid-in capital, par value	$ 0.0001	$ 0.0001
Common stock and additional paid-in capital, shares authorized	2,750.0	2,750.0
Common stock and additional paid-in capital, shares outstanding	781.1	795.6

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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