Quarterly report pursuant to Section 13 or 15(d)

Shareholders' Equity (Details)

v2.4.0.6
Shareholders' Equity (Details) (USD $)
In Millions, except Share data, unless otherwise specified
 1 Months Ended 3 Months Ended 1 Months Ended 3 Months Ended
Jan. 31, 2012
Mar. 31, 2012
Mar. 31, 2011
Mar. 31, 2012
Stock Options [Member]
Mar. 31, 2012
Exchange Agreements [Member]
Non-Convertible Preferred Stock and Trust Preferred Securities [Member]
Mar. 31, 2012
Exchange Agreements [Member]
Common Stock [Member]
Mar. 31, 2012
Exchange Agreement Non-Convertible Preferred Stock for Common Stock [Member]
Non-Convertible Preferred Stock [Member]
Mar. 31, 2012
Exchange Agreement Trust Preferred Securities for Common Stock [Member]
Trust Preferred Securities [Member]
Apr. 30, 2012
Dividend Declared [Member]
Mar. 31, 2012
Retained Earnings [Member]
Mar. 31, 2011
Retained Earnings [Member]
Class of Stock [Line Items]                      
Cash dividends declared per common share $ 0.01               $ 0.01    
Preferred Stock, Including Additional Paid in Capital             $ 296        
Trust Preferred Securities, Carrying Amount               760      
Stock Issued During Period, Shares, New Issues           50,000,000          
Stock Issued During Period, Value, New Issues           412          
Payments Included in Exchange of Preferred Stock and Trust Preferred Securities for Common Stock           398          
Increase In Retained Earnings And Net Income Applicable To Common Shareholders         (246)            
Non Cash Reduction to Preferred Stock Dividends         44            
Noninterest Income, Other Operating Income   (1,134) 261   202            
Stock Issued During Period, Shares, Share-based Compensation, Net of Forfeitures       293,000,000              
Shares Paid for Tax Withholding for Share Based Compensation   103,000,000                  
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized   1,900,000,000                  
Dividends, Preferred Stock, Cash   $ 369 $ 310             $ 369 $ 310