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Fair Value Measurements - Fair Value Option (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Fair Value, Option, Quantitative Disclosures [Line Items]
Fixed maturities, at fair value using the fair value option ("FVO Securities")	$ 263		$ 263		$ 327
Changes in fair value of assets using fair value option	5	$ 16	2	$ 5
Collateralized Loan Obligations [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Fixed maturities, at fair value using the fair value option ("FVO Securities")	$ 152		$ 152		$ 167

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- Definition

Fair Value, Option, Fixed Maturity Securities

+ References

No definition available.

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- Definition

For each line item in the statement of financial position, the amounts of gains and losses from fair value changes included in earnings.

+ References

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-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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