INVESTMENTS - Schedule of Components of Net Investment Income (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Debt Securities, Available-for-Sale [Line Items]
Gross investment income before adjustments	$ 1,989	$ 1,477	$ 890
Funds held interest income (expense)	26	10	2
Future policy benefit reserve income (expense)	(1)	(1)	0
Gross investment income	2,013	1,486	892
Investment expenses	59	53	62
Net investment income	1,954	1,434	830
Fixed maturities
Debt Securities, Available-for-Sale [Line Items]
Gross investment income before adjustments	1,481	1,153	742
Equity securities
Debt Securities, Available-for-Sale [Line Items]
Gross investment income before adjustments	3	3	16
Short-term investments and cash
Debt Securities, Available-for-Sale [Line Items]
Gross investment income before adjustments	195	140	28
Limited partnerships
Debt Securities, Available-for-Sale [Line Items]
Gross investment income before adjustments	206	122	75
Other
Debt Securities, Available-for-Sale [Line Items]
Gross investment income before adjustments	$ 104	$ 59	$ 29

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