EQUITY - Components of OCI, Net of Taxes (Details) - USD ($) $ in Millions		3 Months Ended	12 Months Ended
		Dec. 31, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Change in net unrealized gains (losses) on investments:
Net unrealized gains (losses) arising during the period			$ 192	$ (495)	$ (90)
(Gains) losses reclassified into net income (loss) during the period			4	6	(3)
Net unrealized gains (losses) on investments			196	(489)	(93)
Adjustments for policyholders’ liabilities, insurance liability loss recognition and other			0	9	(2)
Change in unrealized gains (losses), net of adjustments (net of deferred income tax expense (benefit) of $33, $(25) and $(25))	[1]		196	(480)	(95)
Change in LFPB discount rate and MRB credit risk
Change in market risk benefits - instrument-specific credit risk (net of deferred income tax expense (benefit) of $(137), $0 and $0)			(513)	1	0
Changes in liability for future policy benefits - current discount rate (net of deferred income tax expense (benefit) of $1, $0, and $0)			4	0	0
Other comprehensive income (loss), net of income taxes			(313)	(479)	(95)
Deferred income tax expense (benefit) for change in unrealized gains (losses)			33	(25)	(25)
Deferred income tax expense (benefit) for market risk benefits - change in instrument-specific credit risk			(137)	0	0
Deferred income tax expense (benefit) for liability for future policy benefits - change in current discount rate			1	0	0
Establishment of valuation allowance		$ 81
Valuation allowance		$ 85	5	85
Reclassification adjustment			(1)	(1)	1
Cumulative effect, period of adoption, adjustment | Accounting Standards Update 2018-12
Change in LFPB discount rate and MRB credit risk
Other comprehensive income (loss), net of income taxes			0	0	57
Net of deferred income tax expense (benefit) for long duration targeted improvements			0	0	15
Cumulative effect of period of adoption, adjusted balance | Accounting Standards Update 2018-12
Change in LFPB discount rate and MRB credit risk
Other comprehensive income (loss), net of income taxes			$ (313)	$ (479)	$ (38)

[1] See Note 14 of the Notes to these Consolidated Financial Statements for details of change in unrealized gains (losses), net of adjustments.