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INVESTMENTS - Summary of Gross Gains (Losses) from Sales of Fixed Maturity and Equity Securities (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Debt Securities, Available-for-Sale [Line Items]
Proceeds from sales of fixed maturity securities - available for sale	$ 300	$ 405	$ 468	$ 1,177
Gross gains from dispositions	4	5	21	33
Gross losses from dispositions	(23)	(58)	(42)	(98)
Proceeds from sales of equity securities			126	1,030
Equity securities
Debt Securities, Available-for-Sale [Line Items]
Proceeds from sales of equity securities	80	592	126	1,030
Gross gains from dispositions	2	60	8	67
Gross losses from dispositions	$ 0	$ (2)	$ 0	$ (53)

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Amount of realized gain on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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