Quarterly report pursuant to Section 13 or 15(d)

Earnings Per Common Share (Details Textual)

v2.4.0.6
Earnings Per Common Share (Details Textual)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Stock Options [Member]
   
Earnings Per Common Share (Textual) [Abstract]    
Average options to purchase shares of common stock 176 230
Warrants [Member]
   
Earnings Per Common Share (Textual) [Abstract]    
Average options to purchase shares of common stock 272 122
Series L Preferred Stock [Member] | Mandatorily Convertible [Member]
   
Earnings Per Common Share (Textual) [Abstract]    
Average options to purchase shares of common stock 62 67
Preferred Stock, Dividend Rate, Percentage 7.25%  
Series T Preferred Stock [Member]
   
Earnings Per Common Share (Textual) [Abstract]    
Incremental Common Shares Attributable to Conversion of Preferred Stock 700