Income Taxes - Temporary Differences (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Deferred tax assets
Federal and state loss carryforwards	$ 1,421	$ 1,489
Net unrealized investment losses	522	484
Compensation and benefits	161	190
Current discount rate	165	187
Tax credits	154	131
Insurance Reserves	0	9
Investments	47	5
Other assets	175	165
Total gross assets before valuation allowance	2,645	2,660
Less: Valuation allowance	96	95
Assets, net of valuation allowance	2,549	2,565
Deferred tax liabilities
Deferred policy acquisition costs	(324)	(358)
Insurance reserves	(24)	0
Other liabilities	(67)	(47)
Total gross liabilities	(415)	(405)
Net deferred income tax asset (liability)	2,134	2,160
Business Acquisition [Line Items]
Net Deferred tax assets	2,134	2,160
Valuation allowance	96	95
Accumulated other comprehensive income (loss)	(2,462)	(2,400)	$ (3,055)
Accumulated other comprehensive income (loss)	(2,462)	(2,400)	$ (3,055)
Fixed maturities
Business Acquisition [Line Items]
Accumulated other comprehensive income (loss)	(2,500)	(2,300)
Accumulated other comprehensive income (loss)	$ (2,500)	$ (2,300)