Condensed Consolidated Balance Sheets Parenthetical - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024
Statement of Financial Position [Abstract]
Fixed maturities, amortized cost	$ 21,465	$ 19,743
Debt Securities, Available-for-Sale, Allowance for Credit Loss, Excluding Accrued Interest	11	30
Securities pledged, amortized costs	947	1,223
Reinsurance Recoverable, Allowance for Credit Loss	$ 0
Common stock, par value	$ 50
Common stock, shares authorized	100,000
Common stock, shares issued	55,000
Contract with Customer, Asset, Allowance for Credit Loss	$ 0
Less: Allowance for credit losses	$ 24	$ 19