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Market Risk Benefits - Reconciliation of Asset and Liability (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023	Dec. 31, 2022
Market Risk Benefit [Line Items]
Market risk benefits asset	$ 103	$ 88
Market risk benefits liability	459	403
Net	356	315
Fixed Rate Annuities
Market Risk Benefit [Line Items]
Market risk benefits asset	0	0
Market risk benefits liability	1	1
Net	1	1	$ 1
Indexed Annuity
Market Risk Benefit [Line Items]
Market risk benefits asset	103	88
Market risk benefits liability	458	402
Net	$ 355	$ 314	$ 164

X

- Definition

Amount, before effect of reinsurance and after accumulated increase (decrease) in instrument-specific credit risk, of contract or contract feature in long-duration contract issued by insurance entity that both protects contract holder from other-than-nominal capital market risk and exposes insurance entity to other-than-nominal capital market risk.

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Amount of asset position for contract or contract feature in long-duration contract issued by insurance entity that both protects contract holder from other-than-nominal capital market risk and exposes insurance entity to other-than-nominal capital market risk.

+ References

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Amount of liability position for contract or contract feature in long-duration contract issued by insurance entity that both protects contract holder from other-than-nominal capital market risk and exposes insurance entity to other-than-nominal capital market risk.

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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