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Financial Instruments Derivatives Not Designated as Hedging, Fair Value Table (Details) - USD ($) $ in Millions | Dec. 31, 2019 | Dec. 31, 2018
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Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items] |  |
Derivative contracts, at fair value (Note 6) | $ 1,224 | $ 36
Investment Segment |  |
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items] |  |
Collateral posted on certain derivative positions | 903 | 0
Investment Segment | Not designated as hedging instrument |  |
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items] |  |
Asset derivatives, Gross | 291 | 651
Liability derivatives, Gross | 1,324 | 170
Derivative, Fair Value, Amount Offset Against Collateral, Net | (109) | (134)
Investment Segment | Not designated as hedging instrument | Other assets |  |
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items] |  |
Derivative contracts, at fair value(1) | 182 | 517
Investment Segment | Not designated as hedging instrument | Accrued expenses and other liabilities |  |
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items] |  |
Derivative contracts, at fair value (Note 6) | 1,215 | 36
Investment Segment | Not designated as hedging instrument | Equity Contract [Member] |  |
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items] |  |
Asset derivatives, Gross | 291 | 568
Liability derivatives, Gross | 1,058 | 170
Investment Segment | Not designated as hedging instrument | Credit Risk Contract [Member] |  |
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items] |  |
Asset derivatives, Gross | 0 | 76
Liability derivatives, Gross | 266 | 0
Investment Segment | Not designated as hedging instrument | Commodity Contract [Member] |  |
Derivatives Not Designated as Hedging Instruments, Fair Value [Line Items] |  |
Asset derivatives, Gross | 0 | 7
Liability derivatives, Gross | $ 0 | $ 0

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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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4H -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=109980867&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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226008-175313 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=118260190&loc=d3e13433-108611 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -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 + Details
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