Condensed Consolidated Balance Sheets Paranthetical (USD $) In Millions, except Per Share data, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
Statement of Financial Position [Abstract]
Preferred Stock, Par Value (usd per share)	$ 0.001	$ 0.001
Preferred Stock, Shares Authorized	5us-gaap_PreferredStockSharesAuthorized	5us-gaap_PreferredStockSharesAuthorized
Preferred Stock, Shares Outstanding	0us-gaap_PreferredStockSharesOutstanding	0us-gaap_PreferredStockSharesOutstanding
Common Stock, Par Value (usd per share)	$ 0.001	$ 0.001
Common Stock, Shares Authorized	5,600us-gaap_CommonStockSharesAuthorized	5,600us-gaap_CommonStockSharesAuthorized
Common Stock, Shares Issued	1,477us-gaap_CommonStockSharesIssued	1,499us-gaap_CommonStockSharesIssued
Common Stock, Shares Outstanding	1,477us-gaap_CommonStockSharesOutstanding	1,499us-gaap_CommonStockSharesOutstanding

Face amount or stated value per share of common stock.

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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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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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

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Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer.

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The maximum number of nonredeemable preferred shares (or preferred stock redeemable solely at the option of the issuer) permitted to be issued by an entity's charter and bylaws.

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Aggregate share number for all nonredeemable preferred stock (or preferred stock redeemable solely at the option of the issuer) held by stockholders. Does not include preferred shares that have been repurchased.

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