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Derivative Financial Instruments - Narrative (Details) $ in Millions | 9 Months Ended |
--- | --- | ---
Sep. 30, 2021 USD ($) contract | Dec. 31, 2020 USD ($) contract
Embedded derivatives |  |
Derivative [Line Items] |  |
Term of contract, term one | 1 year |
Term of contract, term two | 2 years |
Term of contract, term three | 3 years |
Term of contract, term four | 5 years |
Call options | Not Designated as Hedging Instrument |  |
Derivative [Line Items] |  |
Collateral posted | $ 582 | $ 491
Maximum amount of loss due to credit risk | 40 | 58
Call options | Derivatives for Trading and Investment | Not Designated as Hedging Instrument |  |
Derivative [Line Items] |  |
Collateral posted | 582 | 491
Maximum amount of loss due to credit risk | 40 | 58
Call options | Cash and Cash Equivalents | Not Designated as Hedging Instrument |  |
Derivative [Line Items] |  |
Collateral posted | $ 429 | $ 415
Futures contracts |  |
Derivative [Line Items] |  |
Number of instruments held | contract | 354,000,000 | 384,000,000
Collateral held | $ 3 | $ 4

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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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