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Financial Instruments Gain (Loss) Recognized on Derivatives Not Designated as Hedging Table (Details) - Not Designated as Hedging Instrument [Member] - Net gain (loss) from investment activities [Member] - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
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Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2015 | Sep. 30, 2014
Derivative [Line Items] |  |  |  |  |
Gain (Loss) Recognized in Income | [1] | $ 1,334 | $ 280 | $ 1,417 | $ (324)
Equity contracts |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Gain (Loss) Recognized in Income | [1] | 892 | (50) | 741 | (772)
Foreign exchange contracts |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Gain (Loss) Recognized in Income | [1] | (2) | 141 | 134 | 144
Credit contracts |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Gain (Loss) Recognized in Income | [1] | 387 | 163 | 536 | 133
Commodity contracts |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Gain (Loss) Recognized in Income | [1] | 57 | 26 | 6 | 171
Investment Segment [Member] | Equity contracts |  |  |  |  |
Derivative [Line Items] |  |  |  |  |
Gain (Loss) Recognized in Income | [1] | $ (197) | $ (55) | $ (75) | $ 164
[1] | Gains (losses) recognized on derivatives are classified in net (loss) gain from investment activities in our condensed consolidated statements of operations for our Investment segment and are included in other income, net for all other segments.

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- Definition Amount of realized and unrealized gain (loss) of derivative instruments not designated or qualifying as hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=56946850&loc=SL5624171-113959 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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