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Derivative Financial Instruments - Narrative (Details) $ in Millions | 3 Months Ended |
--- | --- | ---
Mar. 31, 2024 USD ($) contract | Dec. 31, 2023 USD ($) contract
All Counterparties Except Merrill Lynch |  |
Derivative [Line Items] |  |
Counterparties, collateral required threshold | 0.00% |
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 | $ 968 | $ 775
Maximum amount of loss due to credit risk | 46 | 39
Call options | Derivatives for Trading and Investment | Not Designated as Hedging Instrument |  |
Derivative [Line Items] |  |
Collateral posted | 968 | 775
Maximum amount of loss due to credit risk | 46 | 39
Call options | Cash and Cash Equivalents | Not Designated as Hedging Instrument |  |
Derivative [Line Items] |  |
Collateral posted | $ 740 | $ 588
Futures contracts |  |
Derivative [Line Items] |  |
Number of instruments held | contract | 379 | 439
Collateral held | $ 4 | $ 4

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