|
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 |
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Operating Segments [Member]
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| Segment Reporting, Asset Reconciling Item [Line Items] | |||
| Total assets | 1,865,647 | 1,893,621 | |
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ALM activities, including securities portfolio [Member]
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| Segment Reporting, Asset Reconciling Item [Line Items] | |||
| Total assets | 628,228 | 643,037 | |
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Equity investments [Member]
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| Segment Reporting, Asset Reconciling Item [Line Items] | |||
| Total assets | 5,451 | 31,055 | |
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Liquidating businesses [Member]
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| Segment Reporting, Asset Reconciling Item [Line Items] | |||
| Total assets | 27,259 | 41,208 | |
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Elimination of segment excess asset allocations to match liabilities [Member]
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| Segment Reporting, Asset Reconciling Item [Line Items] | |||
| Total assets | (526,363) | (502,284) | |
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Other [Member]
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| Segment Reporting, Asset Reconciling Item [Line Items] | |||
| Total assets | $ 160,632 | $ 154,682 |