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Common Stock and Stock Plans, Shares Reserved, Issued and Authorized (Details)
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Dec. 31, 2011
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Dec. 31, 2010
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|---|---|---|
| Reserved, Issued and Authorized Common Stock [Abstract] | ||
| Common stock, total shares reserved | 858,972,461 | |
| Common Stock, Shares, Issued | 5,358,522,061 | 5,272,414,622 |
| Common stock, shares not reserved | 2,782,505,478 | |
| Total shares authorized | 9,000,000,000 | 9,000,000,000 |
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Stock Plan [Member]
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| Reserved, Issued and Authorized Common Stock [Abstract] | ||
| Common stock, total shares reserved | 746,119,381 | |
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Dividend Reinvestment and Common Stock Purchase Plans [Member]
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| Reserved, Issued and Authorized Common Stock [Abstract] | ||
| Common stock, total shares reserved | 6,916,421 | |
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Convertible Securities and Warrants [Member]
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| Reserved, Issued and Authorized Common Stock [Abstract] | ||
| Common stock, total shares reserved | 105,014,977 | |
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Director Awards [Member]
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| Reserved, Issued and Authorized Common Stock [Abstract] | ||
| Common stock, total shares reserved | 921,682 |