v2.4.0.6
Preferred Stock (Details) (USD $)
In Millions, except Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Detail of Preferred Stock [Abstract]    
Preferred Stock Shares Authorized And Designated 10,047,010 10,089,512
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]    
Shares issued and outstanding 9,591,931 9,566,921
Par value 11,971 9,470
Carrying value 10,572 8,071
Discount 1,399 1,399
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]    
Shares issued and outstanding 858,759 618,382
Carrying value 859 618
Unearned ESOP shares (926) (663)
Preferred Stock, No Voting Rights [Member]
   
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]    
Par value 0  
Preferred Stock, Voting Rights [Member]
   
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]    
Shares issued and outstanding 0  
Par value 0  
Employee Stock Ownership Plan Preferred Stock 2002 [Member]
   
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]    
Shares issued and outstanding 0 3,443
Carrying value 0 3
Employee Stock Ownership Plan Preferred Stock 2002 [Member] | Minimum [Member]
   
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]    
Adjustable Dividend Rate 10.50% 10.50%
Employee Stock Ownership Plan Preferred Stock 2002 [Member] | Maximum [Member]
   
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]    
Adjustable Dividend Rate 11.50% 11.50%
Employee Stock Ownership Plan Preferred Stock 2003 [Member]
   
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]    
Shares issued and outstanding 6,231 13,591
Carrying value 6 13
Employee Stock Ownership Plan Preferred Stock 2003 [Member] | Minimum [Member]
   
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]    
Adjustable Dividend Rate 8.50% 8.50%
Employee Stock Ownership Plan Preferred Stock 2003 [Member] | Maximum [Member]
   
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]    
Adjustable Dividend Rate 9.50% 9.50%
Employee Stock Ownership Plan Preferred Stock 2004 [Member]
   
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]    
Shares issued and outstanding 17,115 26,815
Carrying value 17 27
Employee Stock Ownership Plan Preferred Stock 2004 [Member] | Minimum [Member]
   
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]    
Adjustable Dividend Rate 8.50% 8.50%
Employee Stock Ownership Plan Preferred Stock 2004 [Member] | Maximum [Member]
   
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]    
Adjustable Dividend Rate 9.50% 9.50%
Employee Stock Ownership Plan Preferred Stock 2005 [Member]
   
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]    
Shares issued and outstanding 30,092 40,892
Carrying value 30 41
Employee Stock Ownership Plan Preferred Stock 2005 [Member] | Minimum [Member]
   
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]    
Adjustable Dividend Rate 9.75% 9.75%
Employee Stock Ownership Plan Preferred Stock 2005 [Member] | Maximum [Member]
   
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]    
Adjustable Dividend Rate 10.75% 10.75%
Employee Stock Ownership Plan Preferred Stock 2006 [Member]
   
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]    
Shares issued and outstanding 46,112 58,632
Carrying value 46 59
Employee Stock Ownership Plan Preferred Stock 2006 [Member] | Minimum [Member]
   
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]    
Adjustable Dividend Rate 10.75% 10.75%
Employee Stock Ownership Plan Preferred Stock 2006 [Member] | Maximum [Member]
   
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]    
Adjustable Dividend Rate 11.75% 11.75%
Employee Stock Ownership Plan Preferred Stock 2007 [Member]
   
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]    
Shares issued and outstanding 68,414 82,994
Carrying value 69 83
Employee Stock Ownership Plan Preferred Stock 2007 [Member] | Minimum [Member]
   
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]    
Adjustable Dividend Rate 10.75% 10.75%
Employee Stock Ownership Plan Preferred Stock 2007 [Member] | Maximum [Member]
   
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]    
Adjustable Dividend Rate 11.75% 11.75%
Employee Stock Ownership Plan Preferred Stock 2008 [Member]
   
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]    
Shares issued and outstanding 89,154 104,854
Carrying value 89 105
Employee Stock Ownership Plan Preferred Stock 2008 [Member] | Minimum [Member]
   
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]    
Adjustable Dividend Rate 10.50% 10.50%
Employee Stock Ownership Plan Preferred Stock 2008 [Member] | Maximum [Member]
   
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]    
Adjustable Dividend Rate 11.50% 11.50%
Employee Stock Ownership Plan Preferred Stock 2010 [Member]
   
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]    
Shares issued and outstanding 231,361 287,161
Carrying value 232 287
Employee Stock Ownership Plan Preferred Stock 2010 [Member] | Minimum [Member]
   
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]    
Adjustable Dividend Rate 9.50% 9.50%
Employee Stock Ownership Plan Preferred Stock 2010 [Member] | Maximum [Member]
   
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]    
Adjustable Dividend Rate 10.50% 10.50%
Employee Stock Ownership Plan Preferred Stock 2011 [Member]
   
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]    
Shares issued and outstanding 370,280 0
Carrying value 370 0
Employee Stock Ownership Plan Preferred Stock 2011 [Member] | Minimum [Member]
   
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]    
Adjustable Dividend Rate 9.00% 0.00%
Employee Stock Ownership Plan Preferred Stock 2011 [Member] | Maximum [Member]
   
Detail of Employee Stock Ownership Plan Preferred Stock [Abstract]    
Adjustable Dividend Rate 10.00% 0.00%
Series A - Non-Cumulative Perpetual Preferred Stock [Member]
   
Detail of Preferred Stock [Abstract]    
Preferred Stock, Liquidation Preference Per Share 0 100,000
Preferred Stock Shares Authorized And Designated 0 25,001
Series B - Non-Cumulative Perpetual Preferred Stock [Member]
   
Detail of Preferred Stock [Abstract]    
Preferred Stock, Liquidation Preference Per Share 0 100,000
Preferred Stock Shares Authorized And Designated 0 17,501
Series G - 7.25% Class A Preferred Stock [Member]
   
Detail of Preferred Stock [Abstract]    
Preferred Stock, Liquidation Preference Per Share 15,000 15,000
Preferred Stock Shares Authorized And Designated 50,000 50,000
Series H - Floating Class A Preferred Stock [Member]
   
Detail of Preferred Stock [Abstract]    
Preferred Stock, Liquidation Preference Per Share 20,000 20,000
Preferred Stock Shares Authorized And Designated 50,000 50,000
Series I - 5.80% Fixed-to-Floating Class A Preferred Stock [Member]
   
Detail of Preferred Stock [Abstract]    
Preferred Stock, Liquidation Preference Per Share 100,000 100,000
Preferred Stock Shares Authorized And Designated 25,010 25,010
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]    
Shares issued and outstanding 25,010 0
Par value 2,501 0
Carrying value 2,501 0
Discount 0 0
Series J - 8.00% Non-Cumulative Perpetual Class A Preferred Stock [Member]
   
Detail of Preferred Stock [Abstract]    
Preferred Stock, Liquidation Preference Per Share 1,000 1,000
Preferred Stock Shares Authorized And Designated 2,300,000 2,300,000
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]    
Shares issued and outstanding 2,150,375 2,150,375
Par value 2,150 2,150
Carrying value 1,995 1,995
Discount 155 155
Series K - 7.98% Fixed-to-Floating Non-Cumulative Perpetual Class A Preferred Stock [Member]
   
Detail of Preferred Stock [Abstract]    
Preferred Stock, Liquidation Preference Per Share 1,000 1,000
Preferred Stock Shares Authorized And Designated 3,500,000 3,500,000
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]    
Shares issued and outstanding 3,352,000 3,352,000
Par value 3,352 3,352
Carrying value 2,876 2,876
Discount 476 476
Series L - 7.50% Non-Cumulative Perpetual Convertible Class A Preferred Stock [Member]
   
Detail of Preferred Stock [Abstract]    
Preferred Stock, Liquidation Preference Per Share 1,000 1,000
Preferred Stock Shares Authorized And Designated 4,025,000 4,025,000
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]    
Shares issued and outstanding 3,968,000 3,968,000
Par value 3,968 3,968
Carrying value 3,200 3,200
Discount 768 768
Dividend Equalization Preferred Shares [Member]
   
Detail of Preferred Stock [Abstract]    
Preferred Stock, Liquidation Preference Per Share 10 10
Preferred Stock Shares Authorized And Designated 97,000 97,000
Preferred Stock, Number of Shares, Par Value and Other Disclosures [Abstract]    
Shares issued and outstanding 96,546 96,546
Par value 0 0
Carrying value 0 0
Discount 0 0