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Market Risk Benefits - Reconciliation of Asset and Liability (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Market Risk Benefit [Line Items]
Market risk benefits assets	$ 189	$ 88
Market risk benefits liability	549	403
Direct
Market Risk Benefit [Line Items]
Market risk benefits assets	128	88
Market risk benefits liability	549	403
Reinsured
Market Risk Benefit [Line Items]
Market risk benefits assets	61	0
Market risk benefits liability	0	0
Indexed Annuities
Market Risk Benefit [Line Items]
Market risk benefits assets	189	88
Market risk benefits liability	548	402
Indexed Annuities | Direct
Market Risk Benefit [Line Items]
Market risk benefits assets	128	88
Market risk benefits liability	548	402
Indexed Annuities | Reinsured
Market Risk Benefit [Line Items]
Market risk benefits assets	61	0
Market risk benefits liability	0	0
Fixed rate annuities
Market Risk Benefit [Line Items]
Market risk benefits assets	0	0
Market risk benefits liability	1	1
Fixed rate annuities | Direct
Market Risk Benefit [Line Items]
Market risk benefits assets	0	0
Market risk benefits liability	1	1
Fixed rate annuities | Reinsured
Market Risk Benefit [Line Items]
Market risk benefits assets	0	0
Market risk benefits liability	$ 0	$ 0

X

- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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