Annual report pursuant to Section 13 and 15(d)

Long-term Debt - Trust and Hybrid Securities (Details)

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Long-term Debt - Trust and Hybrid Securities (Details) (USD $)
In Millions, except Share data, unless otherwise specified
12 Months Ended 0 Months Ended
Dec. 31, 2013
Dec. 31, 2013
Trust Preferred Securities [Member]
Dec. 31, 2012
Trust Preferred Securities [Member]
Dec. 31, 2012
Trust Preferred Securities [Member]
Common Stock [Member]
May 25, 2012
Capital Trust Six [Member]
Dec. 31, 2012
Capital Trust Thirteen [Member]
Dec. 31, 2012
Capital Trust Fourteen [Member]
Dec. 31, 2012
Series F Preferred Stock [Member]
Dec. 31, 2012
Series G Preferred Stock [Member]
May 25, 2012
Fixed to Floating Rate Preferred Hybrid Income Term Securities [Member]
Capital Trust Fourteen [Member]
May 25, 2012
Junior Subordinated Debt [Member]
Capital Trust Six [Member]
May 25, 2012
Junior Subordinated Debt [Member]
Capital Trust Twelve [Member]
Debt Instrument [Line Items]                        
Finance Subsidiaries, Ownership Percentage 100.00%                      
Repayments of Trust Preferred Securities   $ 933 $ 9,400                  
Extinguishment of Debt, Amount   934 9,800   134              
Issuance of common stock, shares       19,000,000                
Issuance of common stock       159                
Trust Preferred Securities, Carrying Amount     9,900     141 493          
Gains (Losses) on Extinguishment of Debt     $ 282                  
shares sold in connection with exchange agreement               1,409,000,000 4,926,000,000      
Weighted Average Rate of Debt                   5.63% 5.625% 6.875%