FAIR VALUE OF ASSETS AND LIABILITIES - Quantitative Information Regarding Internally-Prices Level 3 Assets and Liabilities (Details) $ in Millions		3 Months Ended	9 Months Ended	12 Months Ended
		Mar. 31, 2022	Sep. 30, 2022 USD ($)	Dec. 31, 2021 USD ($)
Assets
Asset-backed securities	[1]		$ 5,565	$ 8,771
Liabilities:
Policyholders' account balances			$ 0	11,750
Asset-backed securities
Assets
Asset-backed securities				1,062
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 | Retained business
Liabilities:
Lapse rate			0.01
Spread over SOFR			0.0018
Utilization rate			0.77
Mortality rate			0
Equity volatility curve			0.22
Level 3 | Valuation, income approach | Minimum     | Internal pricing | Ceded business
Liabilities:
Lapse rate			0.01
Spread over SOFR			0.0000
Utilization rate			0.77
Mortality rate			0
Equity volatility curve			0.22
Level 3 | Valuation, income approach | Minimum     | Internal pricing | Future policy benefits
Liabilities:
Lapse rate		0.01
Spread over Libor		0.0003
Utilization rate		0.39
Mortality rate		0
Equity volatility curve		0.16
Level 3 | Valuation, income approach | Minimum     | Internal pricing | Policyholders' account balances
Liabilities:
Lapse rate		0.01
Spread over Libor		0.0003
Equity volatility curve		0.06
Level 3 | Valuation, income approach | Minimum     | Corporate Securities | Internal pricing
Assets
Discount rate		0.0234
Level 3 | Valuation, income approach | Minimum     | Corporate Securities | Internal pricing | Corporate Debt Securities, One
Assets
Discount rate			0.0385
Level 3 | Valuation, income approach | Minimum     | Corporate Securities | Internal pricing | Corporate Debt Securities, Two
Assets
Discount rate			0.0511
Level 3 | Valuation, income approach | Minimum     | Asset-backed securities | Internal pricing
Assets
Discount rate			0.0335
Level 3 | Valuation, income approach | Maximum     | Internal pricing | Retained business
Liabilities:
Lapse rate			0.20
Spread over SOFR			0.0285
Utilization rate			1
Mortality rate			0.16
Equity volatility curve			0.30
Level 3 | Valuation, income approach | Maximum     | Internal pricing | Ceded business
Liabilities:
Lapse rate			0.20
Spread over SOFR			0.0196
Utilization rate			1
Mortality rate			0.16
Equity volatility curve			0.30
Level 3 | Valuation, income approach | Maximum     | Internal pricing | Future policy benefits
Liabilities:
Lapse rate		0.20
Spread over Libor		0.0113
Utilization rate		0.96
Mortality rate		0.15
Equity volatility curve		0.25
Level 3 | Valuation, income approach | Maximum     | Internal pricing | Policyholders' account balances
Liabilities:
Lapse rate		0.42
Spread over Libor		0.0117
Equity volatility curve		0.31
Level 3 | Valuation, income approach | Maximum     | Corporate Securities | Internal pricing
Assets
Discount rate		0.1017
Level 3 | Valuation, income approach | Maximum     | Corporate Securities | Internal pricing | Corporate Debt Securities, One
Assets
Discount rate			0.0889
Level 3 | Valuation, income approach | Maximum     | Corporate Securities | Internal pricing | Corporate Debt Securities, Two
Assets
Discount rate			0.0733
Level 3 | Valuation, income approach | Maximum     | Asset-backed securities | Internal pricing
Assets
Discount rate			0.0847
Level 3 | Valuation, income approach | Weighted Average | Corporate Securities | Internal pricing
Assets
Discount rate		0.0282
Level 3 | Valuation, income approach | Weighted Average | Corporate Securities | Internal pricing | Corporate Debt Securities, One
Assets
Discount rate			0.0600
Level 3 | Valuation, income approach | Weighted Average | Corporate Securities | Internal pricing | Corporate Debt Securities, Two
Assets
Discount rate			0.0622
Level 3 | Valuation, income approach | Weighted Average | Asset-backed securities | Internal pricing
Assets
Discount rate			0.0484
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
Assets
Asset-backed securities			$ 5,565	8,771
Deposit asset			859
Net modified coinsurance receivable			70
Liabilities:
Retained business			6,304
Future policy benefits				4,060
Policyholders' account balances				2,041
Recurring | Asset-backed securities
Assets
Asset-backed securities			662	1,062
Recurring | Level 3
Assets
Asset-backed securities			521	265
Deposit asset			859
Net modified coinsurance receivable			70
Liabilities:
Retained business			6,304
Future policy benefits				4,060
Policyholders' account balances				2,041
Recurring | Level 3 | Asset-backed securities
Assets
Asset-backed securities			155	23
Recurring | Level 3 | Internal pricing
Assets
Other invested assets - Residential mortgage loans			71
Deposit asset			859
Net modified coinsurance receivable			70
Recurring | Level 3 | Internal pricing | Asset-backed securities
Assets
Asset-backed securities			155
Recurring | Level 3 | Internal pricing | Retained business
Liabilities:
Retained business			3,019
Recurring | Level 3 | Internal pricing | Ceded business
Liabilities:
Ceded business			3,285
Recurring | Level 3 | Internal pricing | Future policy benefits
Liabilities:
Future policy benefits				4,060
Recurring | Level 3 | Internal pricing | Policyholders' account balances
Liabilities:
Policyholders' account balances				2,041
Recurring | Level 3 | Corporate Securities | Internal pricing
Assets
Marketable securities				163
Recurring | Level 3 | Corporate Securities | Internal pricing | Corporate Debt Securities, One
Assets
Marketable securities			334
Recurring | Level 3 | Corporate Securities | Internal pricing | Corporate Debt Securities, Two
Assets
Marketable securities			32
Recurring | Level 3 | Other assets | Internal pricing
Assets
Other assets				400
Recurring | Level 3 | Reinsurance recoverables | Internal pricing
Assets
Reinsurance recoverables			$ 220	$ 1,881
Recurring | Level 3 | Minimum     | Internal pricing | Future policy benefits
Liabilities:
Withdrawal rate assumption			0.76	0.76
Recurring | Level 3 | Maximum     | Internal pricing | Future policy benefits
Liabilities:
Withdrawal rate assumption			1	1

[1] As of April 1, 2022 we have elected the fair value option for these financial statement line items. See Note 2 for further discussion.