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Financial Instruments - Derivatives Not Designated as Hedging, Fair Value Table (Details) - USD ($) $ in Millions | Sep. 30, 2022 | Dec. 31, 2021
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Derivatives Not Designated as Hedging Instruments, Fair Value |  |  |
Unrealized Gain On Derivative Contracts |  | $ 1,511 | $ 612
Derivative contracts, at fair value (liability) |  | 713 | 787
Investment Segment |  |  |
Derivatives Not Designated as Hedging Instruments, Fair Value |  |  |
Collateral for derivative positions |  | 1,045 | 1,906
Investment Segment | Not designated as hedging instrument | Other assets [Member] |  |  |
Derivatives Not Designated as Hedging Instruments, Fair Value |  |  |
Asset derivatives, Gross |  | 1,573 | 1,143
Derivative, Fair Value, Amount Offset Against Collateral, Net | [1] | (74) | (532)
Unrealized Gain On Derivative Contracts | [1] | 1,499 | 611
Investment Segment | Not designated as hedging instrument | Accrued expenses and other liabilities |  |  |
Derivatives Not Designated as Hedging Instruments, Fair Value |  |  |
Liability derivatives, Gross |  | 787 | 1,317
Derivative, Fair Value, Amount Offset Against Collateral, Net | [1] | (74) | (532)
Derivative contracts, at fair value (liability) | [1] | 713 | 785
Investment Segment | Not designated as hedging instrument | Equity Contract | Other assets [Member] |  |  |
Derivatives Not Designated as Hedging Instruments, Fair Value |  |  |
Asset derivatives, Gross |  | 870 | 68
Investment Segment | Not designated as hedging instrument | Equity Contract | Accrued expenses and other liabilities |  |  |
Derivatives Not Designated as Hedging Instruments, Fair Value |  |  |
Liability derivatives, Gross |  | 787 | 1,317
Investment Segment | Not designated as hedging instrument | Credit Risk Contract | Other assets [Member] |  |  |
Derivatives Not Designated as Hedging Instruments, Fair Value |  |  |
Asset derivatives, Gross |  | $ 703 | $ 1,075
[1] | Excludes netting of cash collateral received and posted. The total collateral posted at September 30, 2022 and December 31, 2021 was $1,045 million and $1,906 million, respectively, across all counterparties, which are included in cash held at consolidated affiliated partnerships and restricted cash in the 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 Unrealized Gain On Derivative Contracts. + 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=125515794&loc=SL5624258-113959 + Details
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- Definition Fair value, before 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 elected not to be offset. Excludes assets not subject to a master netting arrangement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226052-175313 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 55 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=99393222&loc=SL20226000-175313 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 20 -Section 50 -Paragraph 4D -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=121570589&loc=SL51823488-111719 Reference 5: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (a),(c) -URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5624163-113959 + Details
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