DERIVATIVES AND HEDGING - Impact of Derivatives by Operating Segment (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, gain (loss)	$ (238)	$ 7
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Investment gains (losses), net	Investment gains (losses), net
Investment gains (losses), net
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, gain (loss)	$ (240)	$ 7
Other income
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, gain (loss)	2	0
Retained Business
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, gain (loss)	(352)	(100)
Retained Business | Investment gains (losses), net
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, gain (loss)	(354)	(100)
Retained Business | Other income
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, gain (loss)	2	0
Ceded Business
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, gain (loss)	114	107
Ceded Business | Investment gains (losses), net
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, gain (loss)	114	107
Ceded Business | Other income
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, gain (loss)	0	0
Interest Rate | Retained Business
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, gain (loss)	(74)	115
Interest Rate | Retained Business | Investment gains (losses), net
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, gain (loss)	(74)	115
Interest Rate | Retained Business | Other income
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, gain (loss)	0	0
Interest Rate | Ceded Business
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, gain (loss)	2	31
Interest Rate | Ceded Business | Investment gains (losses), net
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, gain (loss)	2	31
Interest Rate | Ceded Business | Other income
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, gain (loss)	0	0
Currency/Interest Rate | Retained Business
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, gain (loss)	2	0
Currency/Interest Rate | Retained Business | Investment gains (losses), net
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, gain (loss)	0	0
Currency/Interest Rate | Retained Business | Other income
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, gain (loss)	2	0
Credit | Retained Business
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, gain (loss)	2	0
Credit | Retained Business | Investment gains (losses), net
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, gain (loss)	2	0
Credit | Retained Business | Other income
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, gain (loss)	0	0
Equity | Retained Business
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, gain (loss)	(282)	(215)
Equity | Retained Business | Investment gains (losses), net
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, gain (loss)	(282)	(215)
Equity | Retained Business | Other income
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, gain (loss)	0	0
Equity | Ceded Business
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, gain (loss)	112	76
Equity | Ceded Business | Investment gains (losses), net
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, gain (loss)	112	76
Equity | Ceded Business | Other income
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Derivative, gain (loss)	$ 0	$ 0