Schedule V - Valuation and Qualifying Accounts (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Allowance for losses for commercial mortgage loans, beginning balance	$ 26
Allowance for losses for commercial mortgage loans, Charged to Costs and Expenses	1	$ 11	$ 3
Allowance for losses for commercial mortgage loans, ending balance	24	26
Allowance for credit losses on available-for-sale fixed maturity securities, beginning balance	17	12	58
Credit losses on securities for which credit losses were not previously recorded	22	10	11
Write-offs/Payments/Other	(1)	(5)	(57)
Allowance for credit losses on available-for-sale fixed maturity securities, ending balance	38	17	12
Allowance for credit losses on reinsurance recoverable, beginning balance	28	32	24
Reinsurance Recoverable, Credit Loss Expense (Reversal)	(12)	(4)	8
Reinsurance Recoverable, Allowance for Credit Loss, Period Increase (Decrease)	0	0	0
Allowance for credit losses on reinsurance recoverable, ending balance	16	28	32
Allowance for credit losses on deposit asset, Beginning balance	1	1	0
Charged to cost and expenses	0	0	1
Reinsurance, Loss on Uncollectible Accounts in Period, Amount	0	0	0
Allowance for credit losses on deposit asset, Ending balance	1	1	1
Commercial Portfolio Segment
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Allowance for losses for commercial mortgage loans, beginning balance	26	18	15
Allowance for losses for commercial mortgage loans, Write-offs	(3)	(3)	0
Allowance for losses for commercial mortgage loans, ending balance	24	26	18
Valuation allowance on deferred tax assets
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Valuation allowance on deferred tax assets, beginning balance	95	70	63
Charged to Costs and Expenses	1	(1)	(7)
Write-offs/Payments/Other	0	26	0
Valuation allowance on deferred tax assets, ending balance	$ 96	$ 95	$ 70