DERIVATIVES AND HEDGING - Primary Risks Managed by Derivatives (Details) - Not Designated as Hedging Instrument - USD ($) $ in Millions	Mar. 31, 2024	Dec. 31, 2023
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross Notional Values/Units	$ 33,966	$ 38,283
Fair value, assets	721	811
Fair value, liabilities	(1,093)	(1,302)
Retained Business
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross Notional Values/Units	30,224	34,513
Fair value, assets	454	638
Fair value, liabilities	(1,046)	(1,246)
Retained Business \| Interest Rate Swaps
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross Notional Values/Units	27,932	31,096
Fair value, assets	364	580
Fair value, liabilities	(749)	(923)
Retained Business \| Interest Rate Options
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross Notional Values/Units	215	215
Fair value, assets	0	10
Fair value, liabilities	0	(15)
Retained Business \| Foreign Currency Swaps
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross Notional Values/Units	101	102
Fair value, assets	6	5
Fair value, liabilities	0	0
Retained Business \| Equity Futures
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross Notional Values/Units	(2,015)	(2,025)
Fair value, assets	3	0
Fair value, liabilities	(46)	(71)
Retained Business \| Total Return Swaps
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross Notional Values/Units	1,079	1,079
Fair value, assets	2	0
Fair value, liabilities	(110)	(143)
Retained Business \| Equity Options
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross Notional Values/Units	2,912	4,046
Fair value, assets	79	43
Fair value, liabilities	(141)	(94)
Ceded Business
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross Notional Values/Units	3,742	3,770
Fair value, assets	267	173
Fair value, liabilities	(47)	(56)
Ceded Business \| Interest Rate Swaps
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross Notional Values/Units	505	605
Fair value, assets	16	22
Fair value, liabilities	(10)	(12)
Ceded Business \| Foreign Currency Swaps
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross Notional Values/Units	37	37
Fair value, assets	4	3
Fair value, liabilities	0	0
Ceded Business \| Total Return Swaps
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross Notional Values/Units	399	281
Fair value, assets	0	0
Fair value, liabilities	(3)	0
Ceded Business \| Equity Options
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross Notional Values/Units	2,801	2,847
Fair value, assets	247	148
Fair value, liabilities	$ (34)	$ (44)

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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