Consolidated Condensed Balance Sheets (Parenthetical) (USD $) In Millions, except Per Share data	Sep. 30, 2011	Dec. 31, 2010
Common Stock:
Common stock, shares authorized	500.0	500.0
Common stock, par value	$ 1	$ 1
Common Stock, shares issued	207.1	206.9
Common stock, shares outstanding	185.4	184.0
Common stock, unvested restricted common stock include in shares outstanding	0.9	1.0

The number of nonvested share-based payment awards that contain non-forfeitable rights and voting rights included in the common stock balance.

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

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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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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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