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Investments - Investments - ACL on Fixed Maturities (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Debt Securities, Available-for-sale, Allowance for Credit Loss, Beginning Balance	$ 16	$ 14	$ 16	$ 16
Credit losses on fixed maturities where credit losses were not previously recorded	0	0
Net increases (decreases) in allowance on fixed maturities that had an allowance in a previous period			0	(2)
Collateralized Loan Obligations [Member]
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Debt Securities, Available-for-sale, Allowance for Credit Loss, Beginning Balance	2		2
Credit losses on fixed maturities where credit losses were not previously recorded	0
Net increases (decreases) in allowance on fixed maturities that had an allowance in a previous period			0
CMBS
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Debt Securities, Available-for-sale, Allowance for Credit Loss, Beginning Balance	14	14	14	13
Credit losses on fixed maturities where credit losses were not previously recorded	$ 0	$ 0
Net increases (decreases) in allowance on fixed maturities that had an allowance in a previous period			0	1
Corporate
Debt Securities, Available-for-sale, Allowance for Credit Loss [Line Items]
Debt Securities, Available-for-sale, Allowance for Credit Loss, Beginning Balance			$ 0	3
Net increases (decreases) in allowance on fixed maturities that had an allowance in a previous period				$ (3)