Annual report pursuant to Section 13 and 15(d)

Fair Value Measurements - Narrative (Details)

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Fair Value Measurements - Narrative (Details) (USD $)
In Millions, unless otherwise specified
 12 Months Ended 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2011
Other assets [Member]
Dec. 31, 2010
Other assets [Member]
Dec. 31, 2011
Trading Account Assets [Member]
Dec. 31, 2010
Trading Account Assets [Member]
Dec. 31, 2011
Available-for-sale Securities [Member]
Dec. 31, 2010
Available-for-sale Securities [Member]
Dec. 31, 2011
Loans and leases [Member]
Dec. 31, 2011
Derivative assets [Member]
Dec. 31, 2010
Derivative assets [Member]
Dec. 31, 2011
Fair Value, Measurements, Recurring [Member]
Dec. 31, 2010
Fair Value, Measurements, Recurring [Member]
Dec. 31, 2011
Level 3 [Member]
Fair Value, Measurements, Recurring [Member]
Dec. 31, 2010
Level 3 [Member]
Fair Value, Measurements, Recurring [Member]
Dec. 31, 2009
Level 3 [Member]
Fair Value, Measurements, Recurring [Member]
Dec. 31, 2011
Accrued Liabilities [Member]
Dec. 31, 2011
Long-term Debt [Member]
Dec. 31, 2010
Long-term Debt [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]                                      
Derivative assets $ 73,023 $ 73,000                   $ 73,023 $ 73,000 $ 14,366 [1] $ 18,773 [1] $ 23,048      
Derivative liabilities included in net derivatives                       59,520 [1] 55,914 [1] 8,500 [1] 11,028 [1] 15,200      
More significant transfers into Level 3     375 [2]   1,910 3,241 548 3,503 5 [3],[4] 1,199 [5] 1,067 [6]                
Gross Transfers into Level 3                                   2,111 [3] 1,881 [3]
More significant transfers out of Level 3     (1,975) [2] (299) [7] (1,589) (3,357) (6,338) (445) (4,386) [3],[4] (180) [5] (525) [6]                
Gross Transfers out of Level 3                                 $ 761 [3] $ 1,576 [3] $ 1,784 [3]
[1] For further disaggregation of derivative assets and liabilities, see Note 4 – Derivatives.
[2] Other assets is primarily comprised of net monoline exposure to a single counterparty and private equity investments.
[3] Amounts represent items that are accounted for under the fair value option.
[4] Issuances represent loan originations and mortgage servicing rights retained following securitizations or whole loan sales.
[5] Net derivatives at December 31, 2011 include derivative assets of $14.4 billion and derivative liabilities of $8.5 billion.
[6] Net derivatives at December 31, 2010 include derivative assets of $18.8 billion and derivative liabilities of $11.0 billion.
[7] Other assets is primarily comprised of AFS marketable equity securities.