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Preferred Stock Textuals (Details) (USD $)
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3 Months Ended | 12 Months Ended | 12 Months Ended | 12 Months Ended | |||||||
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Dec. 31, 2011
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Dec. 31, 2010
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Dec. 31, 2011
Trust Preferred Securities [Member]
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Dec. 31, 2011
Trust Preferred Securities [Member]
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Dec. 31, 2011
Preferred Stock, No Voting Rights [Member]
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Dec. 31, 2011
Preferred Stock, Voting Rights [Member]
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Dec. 31, 2011
Series B - Non-Cumulative Perpetual Preferred Stock [Member]
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Dec. 31, 2011
Series A - Non-Cumulative Perpetual Preferred Stock [Member]
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Dec. 31, 2011
ESOP Preferred Stock [Member]
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Dec. 31, 2011
Series I - 5.80% Fixed-to-Floating Class A Preferred Stock [Member]
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Dec. 31, 2010
Series I - 5.80% Fixed-to-Floating Class A Preferred Stock [Member]
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| Preferred Stock (Textual) [Abstract] | |||||||||||
| Shares issued and outstanding | 9,591,931 | 9,566,921 | 0 | 25,010 | 0 | ||||||
| Preferred Stock, Shares Authorized | 20,000,000 | 4,000,000 | |||||||||
| Redemption price per share | $ 100,000 | ||||||||||
| Trust Preferred Securities Notice Redeemed During Period, Value | $ 5,800,000,000 | $ 9,200,000,000 | |||||||||
| Preferred stock, former commitment to issue | 1,800,000,000 | 2,500,000,000 | |||||||||
| 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 | ||||||||||
| Additional paid-in capital included related to preferred stock | 67,000,000 | 45,000,000 | |||||||||
| Par value | $ 11,971,000,000 | $ 9,470,000,000 | $ 0 | $ 0 | $ 2,501,000,000 | $ 0 | |||||
| Voting Rights | If issued, preference shares would be limited to one vote per share | ||||||||||