INCOME TAXES - NARRATIVE (Details)	1 Months Ended	12 Months Ended
	Jul. 31, 2021 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2010	Dec. 31, 2009	Jan. 30, 2009 right
Operating Loss Carryforwards [Line Items]
Carryback of net operating losses to years with a higher statutory corporate rate pursuant to provision of the CARES Act		$ 0	$ 0	$ 34,000,000.0
Tax refund due to CARES Act	$ 80,000,000
Net deferred tax assets		$ 1,157,500,000	112,200,000
Loss limitation based on income of life insurance company, percent		35.00%
Loss limitation based on loss of non-life entities, percent		35.00%
Federal long-term tax exempt rate		3.29%
Ownership change threshold restricting NOL usage		50.00%
Ownership percentage threshold relating to company 382 provision, ownership percentage at which transfers of common stock become void (less than)					4.99%	5.00%
Number of rights for each share | right							1
Ownership percentage threshold relating to company 382 securities							4.99%
Net state operating loss carryforwards		$ 2,500,000	2,300,000
Unrecognized tax benefits		0	$ 0
Internal Revenue Service (IRS)
Operating Loss Carryforwards [Line Items]
Net operating loss carryforwards		$ 800,000,000
Tax Year 2018 And Later
Operating Loss Carryforwards [Line Items]
Acceleration of the utilization of life NOLs				375,000,000
Restoration of non-life NOLs				130,000,000
Tax Years Before 2021
Operating Loss Carryforwards [Line Items]
Acceleration of the utilization of life NOLs				105,000,000
Restoration of non-life NOLs				$ 35,000,000