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Financial Instruments Derivatives Not Designated as Hedging, Fair Value Table (Details) - USD ($) $ in Millions | Jun. 30, 2016 | Dec. 31, 2015
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Not Designated as Hedging Instrument [Member] | Other assets |  |  |
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items] |  |  |
Asset Derivatives, Gross | [1] | $ 21 | $ 430
Asset Derivatives, Netting across contract types | [1],[2] | (2) | (171)
Asset Derivatives, Total | [1],[2] | 19 | 259
Not Designated as Hedging Instrument [Member] | Other assets | Equity contracts |  |  |
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items] |  |  |
Asset Derivatives, Gross | [1] | 0 | 339
Not Designated as Hedging Instrument [Member] | Other assets | Foreign exchange contracts |  |  |
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items] |  |  |
Asset Derivatives, Gross | [1] | 0 | 0
Not Designated as Hedging Instrument [Member] | Other assets | Credit contracts |  |  |
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items] |  |  |
Asset Derivatives, Gross | [1] | 6 | 45
Not Designated as Hedging Instrument [Member] | Other assets | Interest rate swap contracts |  |  |
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items] |  |  |
Asset Derivatives, Gross | [1] | 0 | 0
Not Designated as Hedging Instrument [Member] | Other assets | Commodity contracts |  |  |
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items] |  |  |
Asset Derivatives, Gross | [1] | 15 | 46
Not Designated as Hedging Instrument [Member] | Accrued Expenses and Other Liabilities [Member] |  |  |
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items] |  |  |
Liability Derivatives, Gross | [3] | 450 | 204
Derivative Liability, Fair Value, Amount Offset Against Collateral | [2],[3] | (2) | (171)
Derivative contracts at fair value (liability) | [2],[3] | 448 | 33
Not Designated as Hedging Instrument [Member] | Accrued Expenses and Other Liabilities [Member] | Equity contracts |  |  |
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items] |  |  |
Liability Derivatives, Gross | [3] | 406 | 122
Not Designated as Hedging Instrument [Member] | Accrued Expenses and Other Liabilities [Member] | Foreign exchange contracts |  |  |
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items] |  |  |
Liability Derivatives, Gross | [3] | 2 | 19
Not Designated as Hedging Instrument [Member] | Accrued Expenses and Other Liabilities [Member] | Credit contracts |  |  |
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items] |  |  |
Liability Derivatives, Gross | [3] | 31 | 53
Not Designated as Hedging Instrument [Member] | Accrued Expenses and Other Liabilities [Member] | Interest rate swap contracts |  |  |
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items] |  |  |
Liability Derivatives, Gross | [3] | 0 | 0
Not Designated as Hedging Instrument [Member] | Accrued Expenses and Other Liabilities [Member] | Commodity contracts |  |  |
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items] |  |  |
Liability Derivatives, Gross | [3] | 11 | 10
Investment Funds [Member] | Investment Segment [Member] |  |  |
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items] |  |  |
Collateral for derivative positions |  | $ 423 | $ 883
[1] | Net asset derivatives are located within other assets in our condensed consolidated balance sheets.
[2] | Excludes netting of cash collateral received and posted. The total collateral posted at June 30, 2016 and December 31, 2015 was $423 million and $883 million, respectively, across all counterparties.
[3] | Net liability derivatives are located within accrued expenses and other liabilities in our condensed consolidated balance sheets.

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- Definition Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items] + References No definition available. + Details
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- Definition The aggregate fair value of assets that are already posted, at the end of the reporting period, as collateral for derivative instruments with credit-risk-related contingent features. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4H -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=64837297&loc=SL5624258-113959 + Details
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- Definition Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41271-113958 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13433-108611 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6945355&loc=d3e41228-113958 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 15 -URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13495-108611 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=51825145&loc=SL20226008-175313 + Details
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- Definition Fair value, after effects of master netting arrangements, of financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset offset against an obligation to return collateral. Includes assets not subject to a master netting arrangement and not elected to be offset. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 8 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=64837297&loc=d3e41678-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=51825145&loc=SL20226016-175313 + Details
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