FAIR VALUE OF ASSETS AND LIABILITIES - PREDECESSOR COMPANY- Quantitative Information Regarding Internally-Prices Level 3 Assets and Liabilities (Details) $ in Millions	12 Months Ended
	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
LIABILITIES
Policyholder account balances	$ 0	$ 11,750
Level 3 | Minimum
LIABILITIES
Policyholder age		45 years
Level 3 | Minimum     | Future policy benefits
LIABILITIES
Mortality rate		0
Level 3 | Maximum
LIABILITIES
Policyholder age		90 years
Level 3 | Valuation, income approach | Minimum     | Internal pricing | Future policy benefits
LIABILITIES
Lapse rate	0.01	0.01
Spread over Libor	0.0000	0.0003
Utilization rate	0.925	0.39
Mortality rate	0	0
Equity volatility curve	0.195	0.16
Level 3 | Valuation, income approach | Minimum     | Internal pricing | Policyholders' account balances
LIABILITIES
Lapse rate	0.01	0.01
Spread over Libor	0.0000	0.0003
Utilization rate	0.925
Mortality rate	0
Equity volatility curve	0.195	0.06
Level 3 | Valuation, income approach | Minimum     | Corporate Securities | Internal pricing
ASSETS
Discount rate		0.0234
Level 3 | Valuation, income approach | Minimum     | Asset-Backed Securities | Internal pricing
ASSETS
Discount rate	0.0719
Level 3 | Valuation, income approach | Maximum     | Internal pricing | Future policy benefits
LIABILITIES
Lapse rate	0.20	0.20
Spread over Libor	0.0243	0.0113
Utilization rate	1	0.96
Mortality rate	0.16	0.15
Equity volatility curve	0.26	0.25
Level 3 | Valuation, income approach | Maximum     | Internal pricing | Policyholders' account balances
LIABILITIES
Lapse rate	0.20	0.42
Spread over Libor	0.0221	0.0117
Utilization rate	1
Mortality rate	0.16
Equity volatility curve	0.26	0.31
Level 3 | Valuation, income approach | Maximum     | Corporate Securities | Internal pricing
ASSETS
Discount rate		0.1017
Level 3 | Valuation, income approach | Maximum     | Asset-Backed Securities | Internal pricing
ASSETS
Discount rate	0.0851
Level 3 | Valuation, income approach | Weighted Average | Corporate Securities | Internal pricing
ASSETS
Discount rate		0.0282
Level 3 | Valuation, income approach | Weighted Average | Asset-Backed Securities | Internal pricing
ASSETS
Discount rate	0.0794
Level 3 | Valuation, market approach | Minimum     | Corporate Securities | Internal pricing
ASSETS
EBITDA multiplier		6.5
Level 3 | Valuation, market approach | Maximum     | Corporate Securities | Internal pricing
ASSETS
EBITDA multiplier		12.4
Level 3 | Valuation, market approach | Weighted Average | Corporate Securities | Internal pricing
ASSETS
EBITDA multiplier		8.8
Level 3 | Valuation, cost approach | Minimum     | Corporate Securities | Internal pricing
ASSETS
Liquidation value		0.6258
Level 3 | Valuation, cost approach | Maximum     | Corporate Securities | Internal pricing
ASSETS
Liquidation value		0.6258
Level 3 | Valuation, cost approach | Weighted Average | Corporate Securities | Internal pricing
ASSETS
Liquidation value		0.6258
Recurring
LIABILITIES
Future policy benefits		$ 4,060
Policyholder account balances		2,041
Recurring | Level 3
LIABILITIES
Future policy benefits		4,060
Policyholder account balances		2,041
Recurring | Level 3 | Internal pricing | Future policy benefits
LIABILITIES
Future policy benefits	$ 2,941	4,060
Recurring | Level 3 | Internal pricing | Policyholders' account balances
LIABILITIES
Policyholder account balances	2,605	2,041
Recurring | Level 3 | Corporate Securities | Internal pricing
ASSETS
Marketable securities		163
Recurring | Level 3 | Other assets | Internal pricing
ASSETS
Other invested assets - Policy loans		400
Recurring | Level 3 | Reinsurance recoverables | Internal pricing
ASSETS
Reinsurance recoverables	$ 235	$ 1,881
Recurring | Level 3 | Minimum     | Internal pricing | Future policy benefits
LIABILITIES
Withdrawal rate assumption	0.77	0.76
Recurring | Level 3 | Maximum     | Internal pricing | Future policy benefits
LIABILITIES
Withdrawal rate assumption	1	1