Income Taxes - Significant components of deferred tax assets and liabilities (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Deferred tax assets:
Federal net operating loss carryforwards	$ 2	$ 12
Insurance claims and reserves	255	249
Employee benefits	108	112
Other, net	24	26
Total deferred tax assets before valuation allowance	399	408
Valuation allowance against deferred tax assets	(16)	(25)
Total deferred tax assets	383	383
Deferred tax liabilities:
Investment securities	(52)	(200)
Deferred policy acquisition costs	(66)	(61)
Insurance claims and reserves transition liability	(12)	(17)
Real estate, property and equipment	(23)	(29)
Total deferred tax liabilities	(153)	(307)
Net deferred tax asset	230	76
Deferred Tax Assets, Operating Loss Carryforwards, Foreign	$ 10	$ 9