INVESTMENTS - Trading Securities (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Investments, Debt and Equity Securities [Abstract]
Net investment gains (losses) recognized during the period on securities held at the end of the period	$ 0	$ 4	$ 15	$ 17
Net investment gains (losses) recognized on securities sold during the period	0	(1)	0	(2)
Unrealized and realized gains (losses) on trading securities	0	3	15	15
Interest and dividend income from trading securities	4	2	5	4
Net investment income (loss) from trading securities	$ 4	$ 5	$ 20	$ 19