Quarterly report pursuant to Section 13 or 15(d)

Shareholders Equity (Details)

v2.3.0.15
Shareholders Equity (Details) (USD $)
1 Months Ended 3 Months Ended 9 Months Ended
Sep. 30, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Sep. 30, 2010
Sep. 30, 2011
Sep. 30, 2010
Sep. 02, 2011
Shares Paid for Tax Withholding for Share Based Compensation           28,000,000    
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized 2,200,000,000 2,200,000,000       2,200,000,000    
Proceeds from Warrant Exercises $ 5,000,000,000              
Preferred Stock Summary (Textuals) [Abstract]                
Preferred stock dividends   343,000,000 301,000,000 310,000,000 348,000,000 954,000,000 1,036,000,000  
Warrant Exercised, Number of Shares               50,000
Issuance of preferred stock and warrants           $ 5,000,000,000    
Series T Preferred Stock [Member]
               
Preferred Stock Summary (Textuals) [Abstract]                
Preferred Stock, Liquidation Preference Per Share $ 100,000 $ 100,000       $ 100,000    
Preferred Stock, Redemption Price Per Share $ 105,000 $ 105,000       $ 105,000    
Preferred Stock, Dividend Rate, Percentage           6.00%    
Preferred Stock, Dividend Rate, Percentage Unpaid           8.00%    
Stock Options [Member]
               
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures           49,000,000    
Restricted Stock Units (RSUs) [Member]
               
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures           197,000,000    
Authorized restricted stock units to be settled in common shares 130,000,000 130,000,000       130,000,000    
Berkshire Hathaway Warrant Six Percent Perpetual Preferred Series T Stock [Member]
               
Class of Warrant or Right, Number of Securities Called by Warrants or Rights               700,000,000
Warrant Expiration Date               2021-09-01
Investment Warrants, Exercise Price $ 7.142857              
Preferred Stock Dividend Rate Percentage Option To Exercise In Cash or Noncash Warrant Transaction               6.00%