INVESTMENTS - Trading Securities (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Investments, Debt and Equity Securities [Abstract]
Net investment gains (losses) recognized during the period on securities held at the end of the period	$ (9)	$ (8)	$ 8	$ (53)
Net investment gains (losses) recognized on securities sold during the period	(1)	1	(3)	0
Unrealized and realized gains (losses) on trading securities	(10)	(7)	5	(53)
Interest and dividend income from trading securities	1	1	6	6
Net investment income (loss) from trading securities	$ (9)	$ (6)	$ 11	$ (47)