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Preferred Stock Textuals (Details) (USD $)
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12 Months Ended | |
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Dec. 31, 2012
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Dec. 31, 2011
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| Preferred Stock (Textual) [Abstract] | ||
| Par value | $ 14,282,000,000 | $ 12,830,000,000 |
| Shares issued and outstanding | 10,558,865 | 10,450,690 |
| Voting Rights | If issued, preference shares would be limited to one vote per share | |
| Additional paid-in capital included related to preferred stock | 75,000,000 | 67,000,000 |
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Preferred Stock, No Voting Rights [Member]
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| Preferred Stock (Textual) [Abstract] | ||
| Preferred Stock, Shares Authorized | 20,000,000 | |
| Par value | 0 | |
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Preferred Stock, Voting Rights [Member]
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| Preferred Stock (Textual) [Abstract] | ||
| Preferred Stock, Shares Authorized | 4,000,000 | |
| Par value | 0 | |
| Shares issued and outstanding | 0 | |
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Employee Stock Ownership Plan Preferred Stock [Member]
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| Preferred Stock (Textual) [Abstract] | ||
| Redemption terms | We have the option to redeem the ESOP Preferred Stock at any time, in whole or in part, at a redemption price per share equal to the higher of (a) $1,000 per share plus accrued and unpaid dividends or (b) the fair market value | |
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Series N - 5.20% Non-Cumulative Perpetual Class A Preferred Stock [Member]
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| Preferred Stock (Textual) [Abstract] | ||
| Par value | 750,000,000 | 0 |
| Shares issued and outstanding | 30,000 | 0 |
| Depositary shares issued and outstanding | 30,000,000 | |
| Percentage Interest in a share of issued preferred stock | 0.10% | |
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Series O - 5.125% Non-Cumulative Perpetual Class A Preferred Stock [Member]
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| Preferred Stock (Textual) [Abstract] | ||
| Par value | 650,000,000 | 0 |
| Shares issued and outstanding | 26,000 | 0 |
| Depositary shares issued and outstanding | 26,000,000 | |
| Percentage Interest in a share of issued preferred stock | 0.10% | |
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Series G - 7.25% Class A Preferred Stock [Member]
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| Preferred Stock (Textual) [Abstract] | ||
| Preferred stock, commitment to issue | 0 | |
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Series H - Floating Class A Preferred Stock [Member]
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| Preferred Stock (Textual) [Abstract] | ||
| Preferred stock, commitment to issue | $ 0 |