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Financial Instruments Derivative Activities Table (Details) - USD ($) $ in Millions | Dec. 31, 2015 | Dec. 31, 2014
--- | --- | ---
Credit swaps(1) |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative, Notional Amount |  | $ 10,000 |  |
Primary underlying risk: |  |  |  |
Long Notional Exposure |  | 187 |  | $ 389
Short Notional Exposure |  | 2,306 | [1] | 1,495
Equity swaps |  |  |  |
Primary underlying risk: |  |  |  |
Long Notional Exposure |  | 1,343 |  | 108
Short Notional Exposure |  | 14,167 |  | 11,312
Foreign currency forwards |  |  |  |
Primary underlying risk: |  |  |  |
Long Notional Exposure |  | 0 |  | 0
Short Notional Exposure |  | 842 |  | 1,578
Interest rate contracts(2) |  |  |  |
Derivative [Line Items] |  |  |  |
Derivative, Notional Amount |  | 16,000 |  |
Notional Exposure of Derivatives, Short Position, less than three months | [1] | 74 |  |
Primary underlying risk: |  |  |  |
Long Notional Exposure |  | 0 |  | 0
Short Notional Exposure |  | 137 | [2] | 137
Commodity contracts |  |  |  |
Primary underlying risk: |  |  |  |
Long Notional Exposure |  | 43 |  | 36
Short Notional Exposure |  | $ 643 |  | $ 234
[1] | The short notional amount on our credit default swap positions is approximately $10.0 billion as of December 31, 2015. However, because credit spreads cannot compress below zero, our downside short notional exposure to loss is approximately $2.3 billion.
[2] | The short notional amount on certain of our interest rate contracts with a three month duration is $16.0 billion as of December 31, 2015. We assume that interest rates will not fall below zero and therefore our downside short notional exposure to loss on these contracts is $74 million (of the total $137 million disclosed in the above table).

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