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Fair Value Measurements - Fair Value Option (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Fair Value, Option, Quantitative Disclosures [Line Items]
Fixed maturities, at fair value using the fair value option ("FVO Securities")	$ 191		$ 191		$ 308
Changes in fair value of assets using fair value option	7	$ (5)	(10)	$ (2)
Collateralized Loan Obligations [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]
Fixed maturities, at fair value using the fair value option ("FVO Securities")	191		191		308
Fair Value, Option, Residual Interest of Securitizations	$ 191		$ 191		$ 197

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

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