Quarterly report pursuant to Section 13 or 15(d)

Business Segment Information - Consolidated Assets (Details)

v2.4.0.8
Business Segment Information - Consolidated Assets (Details) (USD $)
In Millions, unless otherwise specified
Jun. 30, 2013
Dec. 31, 2012
Jun. 30, 2012
Segment Reporting, Asset Reconciling Item [Line Items]      
Total assets $ 2,123,320 $ 2,209,974 $ 2,160,854
Operating Segments [Member]
      
Segment Reporting, Asset Reconciling Item [Line Items]      
Total assets 1,917,344   1,834,446
ALM activities, including securities portfolio [Member]
      
Segment Reporting, Asset Reconciling Item [Line Items]      
Total assets 659,623   641,210
Equity investments [Member]
      
Segment Reporting, Asset Reconciling Item [Line Items]      
Total assets 4,172   5,546
Liquidating businesses [Member]
      
Segment Reporting, Asset Reconciling Item [Line Items]      
Total assets 72,508   181,802
Elimination of segment excess asset allocations to match liabilities [Member]
      
Segment Reporting, Asset Reconciling Item [Line Items]      
Total assets $ (530,327)   $ (502,150)