INVESTMENTS - Schedule of Components of Net Investment Income (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Debt Securities, Available-for-Sale [Line Items]
Gross investment income before adjustments	$ 1,477	$ 890	$ 1,208
Funds held interest income (expense)	10	2	12
Future policy benefit reserve income (expense)	(1)	0	(1)
Gross investment income	1,486	892	1,219
Investment expenses	53	62	54
Net investment income	1,434	830	1,165
Fixed maturities
Debt Securities, Available-for-Sale [Line Items]
Gross investment income before adjustments	1,153	742	561
Equity securities
Debt Securities, Available-for-Sale [Line Items]
Gross investment income before adjustments	3	16	17
Short-term investments and cash
Debt Securities, Available-for-Sale [Line Items]
Gross investment income before adjustments	140	28	1
Limited partnerships
Debt Securities, Available-for-Sale [Line Items]
Gross investment income before adjustments	122	75	565
Other
Debt Securities, Available-for-Sale [Line Items]
Gross investment income before adjustments	$ 59	$ 29	$ 63

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