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Common Equity (Common Share Activity) (Details)
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9 Months Ended | |||
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Sep. 30, 2012
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| Common Stock Oustanding [Roll Forward] | ||||
| Shares outstanding, January 1 (in shares) | 111,018,821 | |||
| Equity incentive plans (in shares) | 20,195 | |||
| Other (in shares) | (51,616) | [1] | ||
| Shares outstanding, September 30 (in shares) | 110,987,400 | |||
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
Other Common Stock Activity No definition available.
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| X | ||||||||||
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- Definition
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. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
Number of shares issued during the period as a result of an employee stock purchase plan. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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