DERIVATIVES AND HEDGING - Primary Risks Managed by Derivatives (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Other invested assets (includes $141 and $430 of assets measured at fair value at December 31, 2023 and 2022, respectively)	Other invested assets (includes $141 and $430 of assets measured at fair value at December 31, 2023 and 2022, respectively)
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Other liabilities	Other liabilities
Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross Notional Values/Units	$ 38,283	$ 24,075
Fair value, assets	811	667
Fair value, liabilities	1,302	1,075
Retained Business \| Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross Notional Values/Units	34,513	14,300
Fair value, assets	638	432
Fair value, liabilities	1,246	602
Retained Business \| Interest Rate Swaps \| Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross Notional Values/Units	31,096	12,131
Fair value, assets	580	228
Fair value, liabilities	(923)	(553)
Retained Business \| Interest Rate Options \| Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross Notional Values/Units	215	0
Fair value, assets	10	0
Fair value, liabilities	(15)	0
Retained Business \| Foreign Currency Swaps \| Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross Notional Values/Units	102	100
Fair value, assets	5	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	0	520
Fair value, assets	0	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	(2,025)	(1,737)
Fair value, assets	0	46
Fair value, liabilities	(71)	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	0	24
Fair value, liabilities	(143)	(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	43	118
Fair value, liabilities	(94)	0
Ceded Business \| Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross Notional Values/Units	3,770	9,775
Fair value, assets	173	235
Fair value, liabilities	56	473
Ceded Business \| Interest Rate Swaps \| Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross Notional Values/Units	605	2,517
Fair value, assets	22	48
Fair value, liabilities	(12)	(117)
Ceded Business \| Foreign Currency Swaps \| Not Designated as Hedging Instrument
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Gross Notional Values/Units	37	48
Fair value, assets	3	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	0	71
Fair value, assets	0	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	281	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	2,847	7,139
Fair value, assets	148	180
Fair value, liabilities	$ (44)	$ (356)

Indicates line item in statement of financial position that includes derivative asset.

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- Definition

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