Income Taxes - Temporary Differences (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Insurance reserves	$ 0	$ 112
Investments	57	9
Compensation and benefits	63	60
Loss carryforwards	211	0
Other assets	0	35
Total gross assets	331	216
Net unrealized investment (gains) losses	(463)	(645)
Insurance reserves	(23)	0
Deferred policy acquisition costs	(71)	(10)
Other liabilities	(1)	0
Total gross liabilities	(558)	(655)
Net deferred income tax asset (liability)	(227)	(439)
Operating Loss Carryforwards	1,668
Federal net operating loss carryforward	$ 1,006	$ 0