INVESTMENTS - Schedule of Components of Net Investment Income (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Debt Securities, Available-for-Sale [Line Items]
Gross investment income before adjustments	$ 533	$ 541	$ 1,109	$ 1,031
Funds held interest income (expense)	5	2	9	14
Future policy benefit reserve income (expense)	0	0	0	0
Gross investment income	538	543	1,118	1,045
Investment expenses	15	11	28	22
Net investment income	523	532	1,091	1,023
Fixed maturities
Debt Securities, Available-for-Sale [Line Items]
Gross investment income before adjustments	411	396	804	782
Equity securities
Debt Securities, Available-for-Sale [Line Items]
Gross investment income before adjustments	1	1	3	2
Short-term investments and cash
Debt Securities, Available-for-Sale [Line Items]
Gross investment income before adjustments	29	33	56	82
Limited partnerships
Debt Securities, Available-for-Sale [Line Items]
Gross investment income before adjustments	61	88	180	113
Other
Debt Securities, Available-for-Sale [Line Items]
Gross investment income before adjustments	$ 31	$ 22	$ 68	$ 52

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