INCOME TAXES - Unrecognized tax benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Unrecognized Tax Benefits	$ (4)	$ (3)	$ (18)
(Additions) reductions for tax positions related to current year	(6)	(1)	(2)
Reductions for tax positions related to prior years	0	0	0
Transfer of tax positions related to prior years to Parent	0	0	17
Unrecognized Tax Benefits	$ (10)	$ (4)	$ (3)