REVENUE - Interest Revenue Earned And Interest Expense Paid From Fully-paid Securities Lending (Details) - Fully Paid Securities Lending - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Revenue from Contract with Customer [Abstract]
Interest revenue	$ 44	$ 11
Disaggregation of Revenue [Line Items]
Interest on corporate cash and investments	44	11
Interest expense	(7)	(2)
Fully-Paid Securities Lending, net	$ 37	$ 9