Annual report pursuant to Section 13 and 15(d)

Shareholder's Equity (Details)

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Shareholder's Equity (Details) (USD $)
Share data in Millions, except Per Share data, unless otherwise specified
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2008
Jan. 19, 2011
Shareholder's Equity (Textuals) [Abstract]          
Term to exercise warrants (years)       10 years  
Stock Repurchase Program, Authorized Amount $ 182,000,000        
Purchase of common stock shares 23.3        
Purchase of common stock shares, value (148,881,000) 0 0    
Purchase of common stock, average price per share $ 6.36        
Purchase price of warrants originally issued to the Treasury         49,100,000
Floating Rate Series B Noncumulative Perpetual Preferred Stock Exchanged   35,500,000      
Issue of Series B preferred stock   23,800,000      
Redemption of trust preferred securities, total 230,300,000        
Proceeds from issuance of Preferred Class B fixed       $ 1,400,000,000  
Warrant exercise Price       $ 8.90