Annual report pursuant to Section 13 and 15(d)

Shareholders' Equity - Preferred Stock and Trust Preferred Securites (Details)

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Shareholders' Equity - Preferred Stock and Trust Preferred Securites (Details) (USD $)
In Millions, except Share data, unless otherwise specified
 12 Months Ended
Dec. 31, 2009
Dec. 31, 2009
Preferred Stock [Member]
Dec. 31, 2011
Exchange Offer [Member]
Dec. 31, 2011
Exchange Offer [Member]
Series D Preferred Stock [Member]
Dec. 31, 2011
Exchange Offer [Member]
Series E Preferred Stock [Member]
Dec. 31, 2011
Exchange Offer [Member]
Series J Preferred Stock [Member]
Dec. 31, 2011
Exchange Offer [Member]
Series K Preferred Stock [Member]
Dec. 31, 2011
Exchange Offer [Member]
Series M Preferred Stock [Member]
Dec. 31, 2011
Exchange Offer [Member]
Series 1 Preferred Stock [Member]
Dec. 31, 2011
Exchange Offer [Member]
Series 2 Preferred Stock [Member]
Dec. 31, 2011
Exchange Offer [Member]
Series 3 Preferred Stock [Member]
Dec. 31, 2011
Exchange Offer [Member]
Series 4 Preferred Stock [Member]
Dec. 31, 2011
Exchange Offer [Member]
Series 5 Preferred Stock [Member]
Dec. 31, 2011
Exchange Offer [Member]
Series 6 Preferred Stock [Member]
Dec. 31, 2011
Exchange Offer [Member]
Non-Convertible Preferred Stock [Member]
Dec. 31, 2011
Exchange Offer [Member]
Series L Preferred Stock [Member]
Class of Stock [Line Items]                                
Preferred Shares Exchanged 467,000,000 323,000,000 304,576 260 5,915 1,058 4,929 4,958 1,215 5,436 563 2,203 3,288 5,612 35,437 269,139
Liquidation Value     $ 1,084 $ 7 [1],[2] $ 148 [1],[2] $ 26 [1],[2] $ 123 [1],[2] $ 124 [1],[2] $ 36 [1],[2] $ 163 [1],[2] $ 17 [1],[2] $ 66 [1],[2] $ 99 [1],[2] $ 6 [1],[2] $ 815 $ 269 [1],[2]
Preferred Share Exchanged Carrying Value $ 11,300 $ 7,300 $ 1,083                          
[1] Carrying value of preferred stock exchanged was $1,083 million.
[2] Amounts shown are before third-party issuance costs.