Consolidated Balance Sheet (Parentheticals) (USD $) In Millions, except Per Share data, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Statement of Financial Position [Abstract]
Common stock - par value	$ 0.001	$ 0.001
Common stock - shares authorized	3,580	3,580
Common stock - shares outstanding	1,294	1,286
Treasury stock - shares	271	249

Face amount or stated value of common stock per share; generally not indicative of the fair market value per share.

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 129

-Paragraph 4

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The maximum number of common shares permitted to be issued by an entity's charter and bylaws.

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Number of shares of common stock outstanding. Common stock represent the ownership interest in a corporation.

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-Name Accounting Principles Board Opinion (APB)

-Number 12

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Number of common and preferred shares that were previously issued and that were repurchased by the issuing entity and held in treasury on the financial statement date. This stock has no voting rights and receives no dividends.

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