INVESTMENTS - Summary of Gross Gains (Losses) from Sales of Fixed Maturity and Equity Securities (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Debt Securities, Available-for-Sale [Line Items]
Proceeds from sales of fixed maturity securities - available for sale	$ 59	$ 245	$ 109	$ 511
Gross gains from dispositions	1	3	4	6
Gross losses from dispositions	(8)	(13)	(12)	(21)
Proceeds from sales of equity securities			46	425
Equity securities
Debt Securities, Available-for-Sale [Line Items]
Proceeds from sales of equity securities	0	343
Gross gains from dispositions	0	4	7	8
Gross losses from dispositions	$ 0	$ (34)	$ 0	$ (46)