Quarterly report pursuant to Section 13 or 15(d)

Business Segment Information - Consolidated Assets (Details)

v2.4.0.6
Business Segment Information - Consolidated Assets (Details) (USD $)
In Millions, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
Jun. 30, 2011
Segment Reporting, Asset Reconciling Item [Line Items]      
Total assets $ 2,160,854 $ 2,129,046 $ 2,261,319
Operating Segments [Member]
      
Segment Reporting, Asset Reconciling Item [Line Items]      
Total assets 1,865,647   1,893,621
ALM activities, including securities portfolio [Member]
      
Segment Reporting, Asset Reconciling Item [Line Items]      
Total assets 628,228   643,037
Equity investments [Member]
      
Segment Reporting, Asset Reconciling Item [Line Items]      
Total assets 5,451   31,055
Liquidating businesses [Member]
      
Segment Reporting, Asset Reconciling Item [Line Items]      
Total assets 27,259   41,208
Elimination of segment excess asset allocations to match liabilities [Member]
      
Segment Reporting, Asset Reconciling Item [Line Items]      
Total assets (526,363)   (502,284)
Other [Member]
      
Segment Reporting, Asset Reconciling Item [Line Items]      
Total assets $ 160,632   $ 154,682