DERIVATIVES AND HEDGING - Primary Risks Managed by Derivatives (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Fair value, assets	$ 380	$ 418
Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross Notional Values/Units	24,667	24,075
Fair value, assets	739	667
Fair value, liabilities	(759)	(1,075)
Retained Business
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Fair value, assets	156	183
Retained Business \| Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross Notional Values/Units	19,602	14,300
Fair value, assets	515	432
Fair value, liabilities	(658)	(602)
Retained Business \| Interest Rate Swaps \| Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross Notional Values/Units	15,856	12,131
Fair value, assets	312	228
Fair value, liabilities	(520)	(553)
Retained Business \| Foreign Currency Swaps \| Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross Notional Values/Units	103	100
Fair value, assets	9	11
Fair value, liabilities	0	0
Retained Business \| Credit Default Swaps \| Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross Notional Values/Units	520	520
Fair value, assets	8	5
Fair value, liabilities	0	0
Retained Business \| Equity Futures \| Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross Notional Values/Units	(2,002)	(1,737)
Fair value, assets	0	46
Fair value, liabilities	(57)	0
Retained Business \| Total Return Swaps \| Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross Notional Values/Units	1,079	0
Fair value, assets	2	24
Fair value, liabilities	(47)	(49)
Retained Business \| Equity Options \| Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross Notional Values/Units	4,046	3,286
Fair value, assets	184	118
Fair value, liabilities	(34)	0
Ceded Business
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Fair value, assets	224	235
Ceded Business \| Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross Notional Values/Units	5,065	9,775
Fair value, assets	224	235
Fair value, liabilities	(101)	(473)
Ceded Business \| Interest Rate Swaps \| Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross Notional Values/Units	1,160	2,517
Fair value, assets	50	48
Fair value, liabilities	(16)	(117)
Ceded Business \| Foreign Currency Swaps \| Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross Notional Values/Units	46	48
Fair value, assets	4	6
Fair value, liabilities	0	0
Ceded Business \| Credit Default Swaps \| Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross Notional Values/Units	70	71
Fair value, assets	2	1
Fair value, liabilities	0	0
Ceded Business \| Total Return Swaps \| Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross Notional Values/Units	24	0
Fair value, assets	0	0
Fair value, liabilities	0	0
Ceded Business \| Equity Options \| Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross Notional Values/Units	3,765	7,139
Fair value, assets	168	180
Fair value, liabilities	$ (85)	$ (356)

Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

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Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

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Nominal or face amount used to calculate payment on derivative.

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