Income Taxes - Temporary Differences (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Income Tax Disclosure [Abstract]
Insurance reserves	$ 276	$ 407
Investments	6	26
Loss carryforwards	112	165
Deferred Tax Assets, Tax Deferred Expense, Other	59	64
Deferred Tax Liabilities, Intangible Assets	49
Deferred Tax Assets, Tax Credit Carryforwards	76	80
Other assets	5	9
Total gross assets before valuation allowance	727	859
Deferred policy acquisition costs	(192)	(175)
Other liabilities	(22)	(22)
Total gross liabilities	(214)	(197)
Deferred Tax Assets, Net	513	662
Federal net operating loss carryforward	535	788
Tax Credit Carryforward, Amount	76	80
Deferred Tax Assets, Tax Deferred Expense, Reserves and Accruals, Reserves	73	48
Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Compensation	71	60
Valuation allowance, deferred tax assets	0	0
Deferred Tax Assets, Net of Valuation Allowance	727	859
Accumulated other comprehensive income (loss)	$ (1,134)	$ (1,644)	$ (1,531)